R/C Drag Racing

[00G]

Nitroman, how many amps does the motor pull at full load? I think I can draw a schematic that uses the servo driver to activate a transistor for instant on/off motor control. It would even have a BEC of sorts. Let me know what you think, I can draw one up.

I am planning to lighten an RS4 for drag racing. As soon as I get back home (May 29), I am going to try the transistor on/off using the servo driver. I'll let you know how it works out. It could be made to have braking/on also.

As for the brushless with a microswitch, I don't think it will work. Brushless motors need either a DC version of 3phase power or alternating coil control. They can't run on straight DC since there are no alternating contacts for the permanent coils. They need their own "special" driver....

[Nitro_Man]

We set our motors to pull 12 to 13 amps under no load. We have tried higher and lower numbers, but 12 to 13 seemed to work best for us.
As for the brushless motor thing, I really have no idea if it will work or not.

Later
Jared

[Soya]

Where can I find microswitches?

[nitropowered]

Couldn't you just use a big capacitor instead of 10+ cells? 1000mAh is about 37310 microfarads and you could get a capacitor w/ a capacitence around 100000 µf @25 volts for around $20. The capacitors are 40mm in diameter and 80 mm long.

[T9D]

The unit of capacitance is a farad. A one farad capacitor can store one coulomb (coo-lomb) of charge at 1 volt. A coulomb is 6.25e18 (6.25 * 10^18, or 6.25 billion billion) electrons. [One amp represents a rate of electron flow of one coulomb of electrons per second, so a one farad can hold one amp-second of electrons at 1 volt.] It is very hard to make a one farad capacitor, so you typically see capacitors measured in microfarads (millionths of a farad).

To get some perspecive on how big a farad is, think about this. A typical alkaline AA battery holds about 2.8 amp-hours (see this page for a chart). That means that the battery can produce 2.8 amps for an hour at 1.5 volts (about 4.2 watt-hours -- a AA battery can light a 4-watt bulb for a little more than an hour). Let's call it 1 volt to make the math easier. To store that much energy in a capacitor, you would need 3,600 * 2.8 = 10,080 farads to hold it, because an amp-hour is 3,600 amp seconds. Obviously it is impractical to use capacitors to store any significant amount of power unless you do it at a high voltage.

-howstuffworks.com

There's your answer.

[nitropowered]

The latest capacitors hold around 500,000 microfarads @16volts. I think that would be enough to power a drag car for a couple of runs.

[T9D]

µf means nanofarad IIRC

[Soya]

I setting up my Bolink Pro Stock with 2 2400 packs, Aveox RC7 BL motor, and 25/72 gearing. Any ideas how fast it will go?

[T9D]

Fast :D

[Nitro_Man]

Here are a few pic's of my Type 1 Team Walbern car that met the curb yesterday. It was a pretty good wreck, it hit the curb, then flew up in a tree. I was totally pissed, and still am!

[Nitro_Man]

Another of the chassis

[Nitro_Man]

The front of the chassis has a pretty sweet kickup on it now.

[Nitro_Man]

*

[Nitro_Man]

Last one

[Soya]

Neat.

[M.R. Ogle]

LOL!!:p

[Nitro_Man]

Yeah that totally sucked. But Steve Saik hooked me up with an old dragmaster chassis so I am back on the road again!! Thanks Steve Woooooo!!!!

[Soya]

I wouldn't mind having one of his quad-magnet motors:D

[Nitro_Man]

Yeah, when his new Sanitarium motors come out I am gonna get one. They are the best motors out there. If you want to go fast you have to have one of his motors.


Have you guys seen the Immortal Force site? If not check it out, there is a picture of myself and my friend on the home page check it out.

www.immortalforce.com

[M.R. Ogle]

Yeah... I don't even attempt to build drag motors myself anymore. Steve's done his homework on multi-cell drag motors, so I don't have to! :)

[Nitro_Man]

Yeah, I never even tried. The motors are super expensive, but you get what you pay for!!
Steve is going to a race in Dallas with us, we told him about so I am super excited that we will get to hang out. Hopefully I can learn a thing or two from him.

[TimmyRC10T3]

Hey guys looks like you'll all been having some fun. I got a couple things to ask. I want to use 12 cells and sometype of motor. I am first tring some older one I have. It does have bearings. I know I am going to need a mircoswitch to pull this off for cheap. Which one do I need like how many amps/volts does it need to be able to handle. Also I also think there is a way to use one for gas and another for brake instead of just coasting. If anyone had some set-up pics and info that would be great. You can email at Tapviper@aol.com if that is easier. Thanks guys.

[albie]

all you need is a good microswitch that is rated at 25 amps.. albie team grandmotorsports
11 time national drag champion...

[Nitro_Man]

yeah what albie said... Jared, Team who cares, 1000 time national drag champion...:rolleyes:

[albie]

hey nitro man i hope that last remark wasnt ment to be funny and i hope you improved on that 7 cell 2.35 jared... roflmao... albie

[Nitro_Man]

ok dude, how long have i been drag racing oh wait, less than a year. You come to San Antonio and drag race on our surface that is covered in koford glue, and 160'F. That 2.35 was done in a bolink funny car, and a ferrite motor. I had a total of about 275 dollars in that car. I just don't like people who try to impress others, "oh I am so good, I am a 11 time national champ." Who gives a ****?

[M.R. Ogle]

I know of SEVERAL people in this sport who always sign off with their race event win resume. (They're usually not IEDA racers, though because they only crown a "National (Class) Champion" at year's end)
I always think it's pretty darn funny!!!





:D :D :D

[Nitro_Man]

M.R. Ogle,

I guess you are right, I just don't understand people like that, I guess.

[albie]

jared it doesnt matter how long you been racing.. also i have raced on 150+ track temps... also i dont have to impress anybody especially you or mike ogle and im not trying to as i dont see a reason too. im happy with my national wins especially when running in 17 car fields and so on... also mike what do you mean not ieda racers.... im an ieda racer and i know others who do this on there sign off as well........... albie

[M.R. Ogle]

Sorry, Albie. Didn't know you ran IEDA, too.

But how did you win the cumulative-point system National Championship 11 years in a row? Jeezus, Even Saik has only won four or five IEDA Natonal Championships. Frankie Martorelli has won four or five years in ProStock, I think. Kent Vahlsing has only won three or four National Championships (top fuel, funny car), and the IEDA is the only truly "National" organization that has been around (or survived)for over ten years.... Hmmmmmmmm....

It's really eleven EVENT wins you're referring to, isn't it? ;)

[albie]

your right mike its event wins isnt every event a national? i know what you mean about winning the points championship there was 2 times in my career that i only had to show up to the last race of the year and would have won it but there was always family related problems that came up and i was a no show and soi gave up the chance to be points champion.. i was never one to brag about what i can do, sometimes i put the national event wins after my name just to show im not a newbie with false advise.. i didnt come here to argue with the nitro guy just wanted to help someone with a question. and not get into a petty argument with some kid over something stupid... im proud to run for grandmotorsports and think they have one of the best cars out there... just like i feel saiko has some fast motors im not one to point fingers im just here to race and break the sub 2s in supergas...... albie:D :D :D :D

[M.R. Ogle]

Yeah, you're right. It does seem like every event is called a "Nationals" in R/C drag racing, doesn't it?
Anyway, I DO want everybody to know that Albie is NOT a newcomer... he DOES run right on the national record, and knows his you-know-what about R/C drag racing motors. His credentials are quite good to give advice.
I just was curious about the eleven wins.;)

[albie]

mike i thank you for the kind words... hey i love them tc3s in rccar action... i got a killer drag one myself... i mainly use it to terrorize the local serpents with there big block 15s........ mike you gonna be at the worlds? hope to see you there.. albie

[murphy3688]

how long is the rc drag strip? i saw earlier that its 160' ???

[albie]

132ft .....................1/10 of the 1320.albie

[InsaneRc]

If you can get Albie to talk and just listen to what he says you'll go faster, TRUST me!!:) :)

[Nitro_Man]

Insane,
I totally agree, i'm sure he knows more about drag racing than me, but his signature just kinda set me off.

[InsaneRc]

I've known Albie for a few years he's a great guy, very knowlegable.

[M.R. Ogle]

Just got the official word... KZ Speedway(.com) is putting in a permanent R/C drag strip. This should be fun!!!
Wonder how fast I can get there if I leave Associated at 4:15????
MRO:D

[Nitro_Man]

Albie,
Saiko said Randy and Adam Pate put down a 1.97 with a super gas set up. Did you hear about that, i'm sure you did, what do you think about it?

[einal]

I am about to become the owner of an Orion Chrome Modified 6 Turn Double motor. Has anyone had any experience with this motor? Any thoughts on how it might work in a Bolink Funny Car? Thanks in advance for your help.

[jigaman]

I am going to make a nirto dragster form scrach. I would like to make a rail type and would just like to know if any on has plans.
Im goning to use the motor from my rustler which is ported so is should be fast. I you can help please respond.:( :( :(

[albie]

Nitro man im yet to see or even hear about that besides what you have just said... saiko is a cool guy and i have raced against randy pate and he is a nice guy. if they did go 1.9 in 6 cell thats great and i congratulate them for it... i did hear that saiko totalled that funnycar that was in the magazine a few weeks ago... albie

[Nitro_Man]

He totalled a P/S. I'm not sure of the kind of chassis type. I think it was similar to the F/C that he used last year at the worlds. Or it could have been one of the new chassis he has. He was using a digital steering servo in the front, and he thinks that his reciever was low at the end of the track, so the radio lost connection with the car.

[albie]

sorry to hear that any crash for a dragcar is not good especially totalling one.. i hate crashing.. so what class you running now any times???

[Nitro_Man]

Right now I am running TF/FC. Times have been really bad best of a 2.12. I am still shooting from the hip as far as combonations go, motor timing, gearing, roll out etc. My buddy ran a 1.98 with a TF/FC set up. We are both running Dragmaster funny cars so they are obviously overweight. I've got a new car on the way so that will shave off that extra few ounces. I've only been running that set up for a few weeks so i'll get it down with time. I've been thinking about going to the Big Daddy race in Florida. I figure there's plenty I could learn there! Later on

[einal]

I have a Bolink Funny Car with the following specs: Orion Chrome Mod 6T double, 7-cell 2400 pack, Super Rooster esc, Parma rear wheels. Right now I'm using a 64P 125T spur and 16T pinion. I don't have a lot punch off the line and the motor and battery get hot pretty quick. Am I under geared or over geared? I am already using the smallest pinion I can find. Should I try a smaller spur or a larger pinion? I'm not real sure what to try or which way to go. Thanks for the help.

[M.R. Ogle]

First, get rid of that speed control. It's a reversing model, if I'm not mistaken, and because of the nature of that kind of ESC, you're not really getting full power to the motor. A microswitch setup will be much, much better for you.
Second, at 16/125, you're WWWAAAYYYY under-geared. The super-tall Parma rear foam tires (I assume) you're running are helping that ratio out, but you'd be a lot better off in the neighborhood of a 4.25 gear ratio with a 2.35 to 2.55 inch tire.
A six turn motor will have a jillion RPM, but may lack punch off the line. But since you've already said you were running a 7 to one gear ratio, I realy can't explain the lazy leave, except for that speed control.
I have no idea why it's getting hot, as these cars only run for two seconds. Not even the Top Fuel cars' motors really get hot in that time.
Maybe someone with more experience than me with 7-cell setups can get you some better dial-in info. Albie??? :)

[einal]

Mike,
The reason I chose to run an esc is that, right now, I'm just running the car in a local parking lot because we don't have a local track to run on. So, I'm stepping off 132 ft., putting down cones, running the car through the cones and driving it back to the starting line. I thought an esc would be better for this since, the way I understand it, microswitches are either full on or full off. All the driving could be why everything gets so hot, also. I run it full speed through the cones and slowly drive back to the line. It still gets very hot pretty quick, though. I'm going to work on the gearing to get it better. I think I'm going to switch back to 48P gears because that's what I have the most of. What size spur gear would suggest I start with? I know that, right now, I won't be able to get the full potential out of the car, but I know I can get it better than where it's at now. Thanks for the help.
Eddie

[einal]

I forgot to mention that I have a 10 turn motor that I'm not using at the moment. Do you think I would be better off using that instead of a 6 turn? Also, I saw some full size funny cars today that are going to run at a local 1/8 mile track and they had no kickup on the rear spoiler just side panels. I'm using the Protoform Camaro body and it has a big kickup. Do you think I could gain some by cutting it down a little? I thought about taking my car to the local drag strip to see if they would let me run it there. I don't think I would need to use the full strip. An 1/8 mile seems a little long to hold an electric car wide open. I don't even know if the timing equipment would pick it up. It sure would be fun though.

[M.R. Ogle]

If you still want to use a speed control.... at least get one in your funny without reverse. I've had a lot of experience with your ESC, and although it's a fine, durable unit for many things, it's really limiting the performance in your funny. That ESC just can't pass the amperage needed to drag race. Try a forward-only racing-style Novak, LRP, or Tekin that has a good high amp rating. I know it's an expensive fix, but try this.... borrow a different, racing style speed control... and try it for a run or two. I think you'll be really surprised!!!
As to the rear kickup, Well my rule is to run as much rear kickup as you need to keep the rear end from "wagging" down the track. The less kickup you use, the more top speed you'll get, but at the expense of traction and top-end stability. On a well-prepared, VHT-sprayed track, you can get away with almost NO kickup (did you see Steve Saik's "Immortal Force" funny in Car Action?) but on a marginal track, your best bet is to have a big 'ol kickup on the rear spoiler. You can always trim it down, you know!!!
And I still think you're under-geared. The six turn should be fine, although that's probably the culprit as to why it's producing so much heat. It's sucking pretty hard on your batteries through that Rooster, and they don't like it!!!
The 10-turn will be good in some track situations, too. Are you hooking up real good? Are you spinning the middles out of the tires? Is the car just leaving lazy then seems to top out early?

[einal]

Thanks Mike. You're a big help. I'll see if I can a different esc. Can you set up microswitches so they're easy to drive or are they just all go and all slow? I'm going to work on that gearing. Probably gonna go to the LHS today and get a different spur. Traction has not been a problem yet. The car just has lazy leave. Actually, if I give it full throttle at the start, the car stutters a little bit and then takes off. It does that with the wheels off the ground also. Could that be a product of too many amps going to the esc? Also, I did see Saik's car in the mag (sweet paint job by the way). That car is just B-A-D. Thanks again for the help. You're really giving some good info.

[M.R. Ogle]

Yes, the stutter is a product of the 6-turn's tremendous amp draw. A smaller spur or bigger pinion will probably just make the stutter worse!!!
As for a microswitch setup... it's either "on" or "off". There isn't a half-speed on these to get you back to the line.
But, the real advantage of the microswitch setup is the fact that you can use the servo's throw as a kind of delay box, so you can pull full throttle immediately on yellow, and easily adjust the radio's throttle hi-side to give you consistent .4 reaction times.
You're on the right track, though. Boy will you be surprised when you get a racing ESC in that baby. HOLD ON!!!
;)

[bondslex1]

I am new to rc drag racing and purchased a 10 cell saddle pack.
I am currently using an associated 10L3.

Please help with detailed info.

[albie]

hey guys ... well besides 6 cell my favorite class is 7 cell mod.. the 6 turn motor is tooo much for the car i understand you bought it already so get a new arm go with an 8x2.. drop the tire size to a 2.4-2.5 and work from there... get rid of the esc... micro switch all theway............... abie

[M.R. Ogle]

If Albie says go with an 8 double, I'd believe him.

As for the charging question...
I use a regular charger, but do five cells at a time. Try this... bring up five cells to a peak at 3 to 3.5 amps, then do the other five. Let both sides stabilize, letting them sit until they're just about room temp. Then, right before you go run, re-peak each side with 5 or 6 amps quickly in succession. It won't take very long since the cells are pretty much already charged, it will just give them a little "kick" to hike up the front-end voltage. :)

[albie]

shoot i remember reading about m r ogles cars in rccar action years ago most noted is his 3 wheel set up where the 2 front wheels were inside the dragster body hence that funky rail body by protoform... him and kent vahlsing were 2 of astro flights big hitters.. .......... as for the 7 cell ... start out with 4.5 gear and go up or down from there and the biggest thing is batteries... you could have the fastest motor in the world but if the batteries cant feed the monster then the car will run poorly. i was taught there are 3 things that makeup a fast car 1 motor ,2 batteries, and 3 is gearing and tire size , if one of these arent at there optimum then the car wont be fast.... so dont just look at the motor look at all 3 of the pyrmid..... albie

[bondslex1]

How do I put connectors on the battery to charge 5 cells at a time? What do I need?

Thanks very much

[M.R. Ogle]

Bondslex1.... just put alligator clips on the ends of your charger's output wires. Then you can clip right onto the wires or battery bars.
By the way... I don't know where in NC you are, but all the current top R/C drag race guys are going to be in Clinton, NC all this weekend.... get over there if you want to see some great, fast action!!!!

Albie... funny story....that "funky" rail body's mold was actually fabricated by me out of wood and bondo, then I shipped it up to Dale Epp to pull me two or three for myself. He looked at it, asked if I minded if he "cleaned it up" a little bit, and pulled a few. I took it to Clinton, NC later that year, and people realy wanted to buy that body, so ProtoForm gave it a part number, a name (Future Shock) and put into production. So, it was never really meant to be a mass-produced body, but it still holds most of the top speed records(George Esterer's 105.6, Chris Collin's 112.7, etc.)

[einal]

Thanks albie and Mike for the suggestions. Hopefully I'll get to try them out soon. What would be a good application for a 6 double? Oval perhaps?

[NEED4SPEED27]

Hey everybody! I'm gonna build a 12 cell dragster that I want to go 60+mph. I'm gonna use an RC10L3 chassis, a Tekin Speedstar ESC, 2 3000mAH stick packs, and a 12T motor. I need a reciever pack and probably gonna use a JR XR2 radio. can someone tell me what a good gear ratio is for it to go maximum speed! thanks for the help.

[DENTEC36]

Ok I went through this whole post and only recall seeing two places to find a micro switch, I found 15,20,25,30&35amp switch's at a comercial washer and dryer supply house, I went with the 35's at $3.50 each they only had 3 so I bought them all, so check your local yellow pages and your likely to find some

[M.R. Ogle]

You found 30 and 35 amp microswitches??? Wow. Never seen those. Can you post a photo of those heavy-duty mammajammas, or at least the manufacturer and code numbers on the sides? I'd sure love to track down some of those switches. :eek:

[DENTEC36]

I don't have a way to post picture's right now but here's the info////// brand is DECO made in korea PN# VPS31C-0D is rated at 30amp's 250v D/C, the other is DECO PN#VPS32C-0D 35amp's 250v D/C these switch's are made for landury washer's and dryer's they are on the lid's and shut off the washer or dryer when the lid is opened, I found the when trying to come-up with a high amp switch for my drag car and my nephew suggested we pull one out of an old landry dryer he had in his garage and LOL it was a 35amp one!!!!! so I looked in the yellow-page's for supplyer's of comercial washer & dryer part's and there they where!!!!! I have yet to burn one out with 12cell's !!! they are regular 3 post conection's

[M.R. Ogle]

Thanks for the information!!!;)

[Aluma]

My friend got a bolink long dragster. I installed an Mtronics Mcubic esc into it along with a futaba RX, 8turn p94 and 16tooth pinion with the stock spur. anyway, He tried it out in the parking lot and he says it started doing donuts! I still cant imagine a 3foot long car doing donuts, but he said it was just doing that every time he launched it. Anyone have any idea why it would be doing this? How do you properly set up a dragster to launch straight? Bolinks instructions are rather scarce if that... :P

[albie]

first off check the rear hubs... the ones bolink give out with there kits are very flimsy and will launch a car sideways. toss the hubs and get some grandmotorsports hubs and apply some slot car traction to the rear tires and spray some soda or sugar water on the ground and let it get sticky then with the traction goop on the tires and good hubs it will hook and fly.. albie

[4x4rust-o-pede]

hey guys

if anyone is interested i have a bolink funny car with no runs and i will include a micro servo and silver body(stock) i have pics but you will need to email me to get them!
i am asking $95 shipped to your doorstep!

thanks
nate

[Rushack]

are there any limits with gas dragging? im concidering building a dual .21 drag car. would that be leagle for competition, if so in what class.

Think of 2 sirio .21 onroads combined, putting out 5 hp, at 44,000 rpm. eeek.
Later.

[Daveyg]

The I.E.D.A. has an extreme class that it would be legal in.

[dragracer28]

I'm not new to drag racing I have raced with NHRA top fuel and A-fuel cars. I'am new to rc drag racing what kind of car do you think I should start with?

[dragracer28]

Y'all have been very helpful

[BiZzAr0]

you people need to use BRUSHLESS MOTORS.

THEY ARE THE FASTEST!!!

WHY HAVENT YOU THOUGH OF IT!!

[dragracer28]

Lots of people do use brushless motors if you read more of this forum. It sounds like most people don't have an unlimited budget to go brushless though.

[alwayssideways]

hey i just modyfied a taimiya quick drive series car
i pulled out the 380 type motor and put in 17turn mod 12cells in series bulit in packs of 4s and they can all be charged seperatly without using aligator clips i run a micro switch i havent bin able to run it yet because i got to save for new tyres but i think i did alright for a 14 year and i might be getting a job at subway so i can save up for a bolink funny car dragster:) drag on

[Paul Songas]

Hi guys.. I have a new website with some pictures and results.
www.songasracing.20m.com

[alwayssideways]

hey all i just bought new tires im charging my batts rite now so i can send my car of for maiden voyage:D :D

[Fastcar]

I don't know who told you about Randy and adam pate going 1.97 with Super gas Setup, It's not true I emailed him about it and he said he wished he had went 1.97 with super Gas. His best is 2.10.

[Fastcar]

TTT

Come'on guys lets get this forum going again.

[Daveyg]

Cool man,, I'm on board,,

wait where we going ?

[Fastcar]

We are going to get this forum back in line of talk.

All the dragracers out there lets talk abotu rc drag racing.
Post your setups and quickest time chassis motor batteries gearing and all other misc items

I'll start

Chassis:GMS pro Mod
motor: D5 7 turn
Batteries: 6 cells 1700's matched by whiplash
Gearing: 93 spur 17 pinion
Body: Hot bodies Pro Stock avenger
Quickest time: 2.37 @ 53MPH only made 1 run.

Chassis:Walbern/GMS/Dragmaster funny car
motor: G-force Saiko motor 7 turn
Batteries: 10 Sanyo 3000'
Gearing:87 spur 14 pinion
Body: Hot bodies funny car avenger
Quickest time: 2.19 @ 54MPH

So all drag racers post your stats.

[Daveyg]

ok,,here go's


nitro topfuel dragster

chassis=home built
engine=RB .21 collari modifed
clutch=mugen
pipe=prather
2 speed=ofna
body=walbern
quickest et.= 1.76 @ 77 mph

[Fastcar]

Hey Daveyg
I have a nitro fusion with the .21 that came on it. It has a best E.T. of 2.42 @ 55MPH.
I was wondering what it might run with the engine off this fusion on a nitro walbern rail?
What are the 2 speed gears that you run?

[Daveyg]

I run a 14-45 first gear and a 19-40 second. the belt drive is a 18-39.

you could probaly get it in the 1.90's with a good chassis.

[albie]

i always love talking about rc drag..... albie

[wjj]

Has any one tried the lite speed engineering dragster? I was wondering how are they compared to the walbern dragster?

[Fastcar]

If there better than walbern they would have to be nothing but excellent. A guy runs a walbern at my local track, he Runs 2.10's @ 66MPH with ease. My choice would be the Walbern rail just because I've seen on run. I would doubt that if I seen and lightspeed one run it would be just as good if not better.

[Daveyg]

you wont go wrong with either one, I build my own chassis only because I can. If I had to buy one it would be a hard choise between the two.
both have run in the 1.60's

[Fastcar]

Guys check out www.rcdrags.com and register on the forum we need more people.

Here is a major news flash for all RC drag racers on the planet.

The I.E.D.A has been acquired by B&D RC Hobbies and is about to bring some serious excitement back to RC Drag Racing.

Here is the inside scoop:

· 5 or more major national level races, with all the same great classes you love!
· Nitro classes are back racing with a fueled fury!
· Records now based on all time and by the year. All right!!
· No major class rule changes
· Current updates and details on all IEDA events, rules, records, etc. will be made available at:
www.ieda-dragracing.com

If you don’t get your questions answered there just
Call a friendly associate of B&D RC hobbies
At (336) 584-8862.


Get ready for the fastest racing action on the planet to hit hard in 2004.

New faces will be welcomed and records will fall, the only question is will you be part of it all.


Bob at bndrc hobbies has bought the IEDA. Guys get ready for the new IEDA. Check out www.rcdrags.com

[cretin]

when i was bitten by the drag bug a few weeks ago, i looked around for the ieda and coudn't find anything.

[Toyotatogo]

Originally posted by Daveyg
ok,,here go's


nitro topfuel dragster

chassis=home built
engine=RB .21 collari modifed
clutch=mugen
pipe=prather
2 speed=ofna
body=walbern
quickest et.= 1.76 @ 77 mph

wow thats pretty FAST what were your gear ratios and how many feet do you run?

[Fastcar]

Toyotatogo, DaveyG is my buddy, doubt he gets on here much now,
I drag race also

We run 132 feet

And in his earlier post he stated....

I run a 14-45 first gear and a 19-40 second. the belt drive is a 18-39.

guess that answers your question.

[funnycarman]

Any Drag racers still on here?

[Fastcar]

I'm still here

[studysession]

This looks like an old thread with a wealth of information here. I want to get an electric dragster myself - does anyone have pics showing how the steering is setup and connected to the servo?

[murphy3688]

i went and got the ball cups. this is a bolink chassis. bolink supplies crappy bent paperclip-like metal wire and set screws to hold it in. $10 bought me the two ball cups for the wheels and the middle ball cup that goes on the servo. i bought a foot of the threaded wire and just put it all together. took time and a lot of effort to feed it in there, but the steering is much more sensitive now, much faster response. i had to relearn how to drive it, but i love it now. i have a pic, but my comp is crappin up

im sure if you spend the cash on a gms, you wont have this problem.

Our personal dragstrip (http://www.nineveh.itgo.com)

-murphy

[microrcdude]

Cool Dragstrip! I like the custom tree, great substitute than those $1K ones for full size cars.

[DragonRail]

You guys can get all the info you need on RC Drag Racing at www.rcdrags.com and www.ieda-dragracing.com .All of the Associations and most of the tracks are list there , plus tons of video and pics.

Bob B

[botmund]

I am very interested in RC Dragracing. There are no one doing it around here where I live. Looking around the information seems somewhat scarce.

At this stage I'm not looking to race (obviously :rolleyes: ), what I do want is to have my own car that I could trim and experiment with. So following the official RC Dragracing rules and limitations is perhaps not that important at this stage. Wondering if someone could help me find additional information.

I am into brushless & LiPo only.
I am interested in Pro Stock/Pro Mod car type cars, not rails

Where do I find wheels?
Where do I find bodies?
Do I have to have a special chassis for this or can I use any stiff chassis?
Are there any "Getting started with electric RC Dragracing" on the internet?

Thanks!

:)


edit:
and Yes am I currently searching the above mentioned sites for more information. ;)

Found Team Walbern (http://www.teamwalbern.com/electric_funnycars.html)
Grand Motorsports (http://www.grandmotorsports.com) :) :) :)

[Monster Sport]

It's been a long time since I last posted anything......but hopefully one of ya remember my rocket powered dragster I made.....well...I finally got to fire it up yesterday.
I'm still testing before I go to any bigger motors. I started with "C" size just to get an idea of how the car will react. I was surprised at how straight it went. When I have the bugs worked out...I'll strip it down for rewiring and some cosmetic work..mostly new rear wheels and a new body.
BTW....anyone have any chrome wheels from the bolink cars that bolt on the rear they would like to sell for this project? lol
Here is the vid I made...it's not the greatest but you get the idea....Rocket Dragster (http://www.youtube.com/watch?v=8iPLTHlrKlU)

[Monster Sport]

double post

[Budget racer]

Very nice, was that a chute that popped out near the end, how do you stop it? My father and i did a wooden rocket car 20 years ago. Worked great every time but we had no brakes. Nice job and want to see the d motor test too.

[botmund]

It's been a long time ...

Nice vid!!! Post more asap!! I wonder if my LHS keeps rocket... ;)

:D

[griz11]

Litespeed nitro top fuel chassis with a Nova 35plus21 motor
Fastest et and speed 1.71 at 79.4 mph on the standard 132 ft strip.

Walbern pro mod chassis willys pro mod body OS .18tz
2.21 at 59.7 mph

A couple of short vids the first one is a run of 1.81 and the second is a walk around the pits at the IMDRA World finals last Oct in San Antonio. www.imdra.com www.rcdrags.com

http://media.putfile.com/Team-Rat-pack-dragster-wins-again

http://media.putfile.com/A-Stroll-around-the-IMDRA-Worlds-Pits

The big guy with the red hat coming out of the covered pit area is the fastest guy on the planet right now. Rainman went 1.403 at over 100mph recently. Also won last year at the RCCA fastest car challenge. Look out this year the Rainman is coming.


Griz

[Jminor]

So I just picked up a Megatech Dark Thunder, I got it from a buddy of mine for 50 bucks. He gave me two engines both of which came out of 1/8th scale truggies. It is missing a couple of things, the front wing, and the motor mounts. My question is would it be alot of work to fit the .28 into this rig? It seems like it'll fit although I know it originally had a .16 The .16 ended up in his Monster Pirate for some reason, and he sold that to another friend of mine. I think I can get my buddy to swap engines if that's the easiest route. Although I would really like to see this thing scream with big block power. Any info you guys could give would be gratly appreciated. I am moving in 5 weeks and want to get this thing up and running to show it off before I leave.

[griz11]

I tried to put a .21 in that puppy and it broke the tranny every time I tried to run it. I'd stick to a .18. That way its decent fast and it won't eat up the other parts.

Griz

[Jminor]

Well I got the stock engine into the car and I have already broken it. I was getting in some shakedown runs to break the engine in again, more just to tune it and show off, and I ran into the tire of my buddies truck which lifted the rear end of the dragster off the ground and made a horrible "CRUNCH". Upon further inspection I found I had stripped both spur gears and broken a motor mount. The new parts came in today and are already on the rig. Hopefully I'll get some weather nice enough to run it again this weeekend.

[Jminor]

Well I haven't run it yet since I fixed it, but I plan on running it tomorrow and Tuesday. I was wondering has any one tried running sand paddle tires on this car or any other R/C dragsters? I mean like a set of the old Tamiya sand scorcher style that came on the Grasshopper, If you put a sheet of lexan across the bottom of the chassis it just might work? Don't you think? I think I have a summer project for atfer I move to North Carolina in two weeks... If this is a bad idea please let me know I think I can pull it off I've run other vehicles in the sand but if anyone has a good reason why I shouldn't I'd like to hear it before possibly ruining my fu new toy.

[griz11]

I used to run those. They will weld on you and leave you with a car on full throttle. I broke mine in half twice before I quit using them. Better setup nowadays is brushless/lipo anyways. Mamba rules drag racing this year. If you do use the switches wire up two on the throttle side so if one welds you are still going to be able to shut it off. There is a way to wire them up so the brake side will break the circuit to the throttle in case one welds too. They aren't good for that many runs before they will melt or weld on you. Depending on how many batteries and what kind of motor of course. I was running 12 cells on a RAE 2mag Neo motor that drew huge amps.

Griz

[h82b2nd]

I am trying to build a "drag car" for fun on a very tight budget using what I mostly have around. Not for racing, just for fun.

I am starting with a HPI super RS4 (got the car for nothing and a lot of room for batteries).

I have a spare Novak super duty ESC and a 6T motor

I put everything together with 12 cells but I cannot gear it to get the motor cool.

I am looking for advice on what to do or have I started out with car/components that will not work together.

[lil_general_lee]

Well, well well.... Visiting an old thread and came across the rocket powered dragster posted on the last page... I tried to get a new thread going here a few weeks ago pertaining specifically to rocket powered vehicles. I recently finished building a rocket car based off of another car that I built in the 90's (Still have it). It was similar to the one posted on the page before with twin side by side motors, Twin D's.. Or E's if desired. I attached a pic of the mid 90's car at the bottom.

Anyways, The new car is much better in my opinion and is powered by a single C, D, or E.. Or larger if wanted. A single D is plenty to get it down the road. It's all 100% custom made from old parts I had laying around and scrap fiberglass. You can tell from the beat up body (used to be on a 12th scale 10 cell drag car.) It has onboard ignition, parachute, very light and tracks straight as an arrow. .. More pics and info on the Rocket Cars if anyone is interested.

[griz11]

There used to be a few guys that ran rocket cars in San Antonio. Years ago when we were running at the K-Mart. That track was so long that you could run them with no problems. Pretty awesome to see a pair of them running. I saw some drag racing history the other day. The first time someone has run 100mph in Texas. There have been quite a few 100mph or better runs this year with the new rules allowing brushless and lipo in the extreme class. The run in this video was 1.336 at 100.2 mph. He ran a pair of 1.33 runs that day. I think his lowest speed was a measly 94 mph :)

Embedded

www.promofo-racing.org/Dash-SA.html

Download

www.promofo-racing.org/video/LiteSpeed/Dash-SA.wmv

Griz

[tim t]

hey griz..it's funny how soon we start calling 94mph measly isn't it? i get a kick out of bernie wolford asking if we''l see 1.2et's at the world finals. i don't think there is a lowest et limit in sight...maybe tire technology or lack of it right now! i can remember back to my full size drag racing days when all the "experts" said top fuel would never go quicker than gary becks 5.39et. look where we are today! brushless and lipo's are my preferred "fuel" in my GMS cars,but who know???maybe by years end there will be some really trick clutch breakthrough and the nitro engines will rule again! Tim T

[griz11]

A 1 second run is possible if the tire works right and the track is sticky enough. At least that is the talk I hear. Its dropped so fast this year who knows. I'm hearing 4 cars that have run in the low 1.3 second range will be at the World Finals. That should be a killer afternoon watching those guys go at it for the Extreme title. Pro Mod shootout Sat evening. Last year that was intense. And although the electrics will be the highlight this year I'm sure no telling what the T/A and T/F nitro guys are liable to pull off. They have been real quiet lately. Shocked me to see Mr Litespeed himself there with an electric car. And I hear the Schmidt's took delivery of an electric chassis last week. Never thought I'd see that :) I sure wish I had enough money to buy a couple more cameras before the race. I found out last weekend playing around that putting them back to back gets some excellent footage. But it would take 4 to do that for both lanes and I only have a pair. Another way to use them is to put one pair at about 10 ft then the other pair at mid track or the finish line. I'll have 4 days to get shots so I expect I'll film that track from every possible angle. I'm taking 100 tapes. I figure I'll use 60. Running 3 cameras burns through some tape. But with 1.3 second runs you need a bunch of them to make a longer video or a DVD length video. One thing for sure I'm not going to try and follow the extreme cars. I'll set up the satellite cameras to catch the start and I'll be pointed toward the finishline. They are just too fast to follow. I tried to film 3 1.3 runs and only got one and that one isn't that good as I lost the car for a bit. I'd like to have a camera at the catch fence for the extreme round :) Bet there are going to be a lot of cars hitting the blankets.

Griz

[tim t]

some of the guys won't be bringing their short wheelbase cars because of the relatively short shut-down area.if i manage to make it there i'm only bringing my funny car and my extreme dragster....i may as well smack the net like everyone else!!

[griz11]

I didn't have any trouble getting stopped last year at the Worlds. They put down 55 gal of LC-6 for the 3 days. It was super sticky. As long as you don't hit the brakes right where those little bumps are right past the last beam you are cool. I was running a nitro with a real brake though. But I hear the brushless cars have a lot better brakes than the old bang switchers. They will have more layers of blankets for the Worlds as well. And the catch net will be moved back just a bit. There is another 10-15 feet of pavement but that tank outlet on the left side forces you to go to the right to get around it. When the net is set up like that you just steer to the right a bit if you are in the left lane and you'll have more run-off than in that video. Last year they used a layer of blankets to slow the cars down then another foot or so they have another layer of them before they get to the layer on the fence itself. As long as you stay away from that tank on the extreme left side you are ok. There is 6 inches or so of concrete sticking up right there that will disintegrate your car. I should know its happened to me a few times. All in all its a good track. Now that its getting older the shifting ground here has taken its toll. We ran in Lampassas a few months back. Perfectly smooth track there because its a taxiway and its very thick. But the cost for something like that is way out of the ballpark. The on-road track they built in Rendon is having the same problems. They get it all ironed out and smooth and a year later there are new bumps to deal with. Alf ran 3 1.3 second runs Sat so its not a fluke. Kinda adds character to the track. Like the old school east coast tracks. Just something else to figure out for everyone.

Griz

[tim t]

i read the imdra thread about alf running 1.33's. it seems like once nic did it everyone said; yeah, me too! about 12 years ago we were drag racing slot cars and thinking,no one will EVER go sub 1 sec. apparently someone forgot to tell one racer and he went .92 et. a few months later we were doing .82 with our pro stock cars. i think we are headed the same direction with our R/C drag cars. hopefully the LC6 will help stop everyone safely. we were using kofords "bog" at the end of the slot car drag strip to stop our cars and it worked REALLY well. we could stop in 2-3 ft. from 85 mph in a pro stock car! we applied the "bog" with a paint roller!!!

[griz11]

I imagine they will prep it like last year. A powerwash followed by about half a barrel of LC-6 for the practice and qualify then put on the rest of the LC-6 to make it the full 55 gallons for the finals on Sunday. And noone walks on it except at the very top so there are no footprints or anything else to mess up the surface. You'll do ok. You get used to it and its not quite as short as it looks in the vid as I was zoomed up which makes things look compressed. I used to get my top fuel car stopped about midway to the net. Just takes some practice and staying clear of those little bumps. They filled in and sealed the track last year but I don't know whats going to happen this year. I can't wait to get underway myself. I started this video thing after last year's event when the stuff I shot looked so crappy. So going back and doing it this year will be a nice victory and a goal accomplished for me.

Griz

[rocketworks]

hey,just a fan of going in a sraight line,REALLY REALLY FAST,just wondering if anyone is into rocket cars,not hacking,but really building something that looks good and pays homage to the jet cars in drag racing,let me know if there are any fans out there..

[greeter896]

I Have a two engine rocket dragster named "Fire & Smoke II". It is scratch built using fiberglass control rods for RC airplaned and PVC foam board to keep the weight down. I am using th Futurershock dragster body by Mike Ogle and Protoform.

Gary

[rocketworks]

hey just checkin in! finished another car full brakes and chutes,will put up pics shortly car runs on e-motors and goes low 2s,if anyone has pics please post them,there not the fastest out there but if you love jet cars there is no better show!
gordon

[rocketworks]

here is the newest in the stable.
gordon

[rocketworks]

i have some new vids up on youtube www.youtube.com/nitroiggys check em out. go fast and go straight!!
gordon*

[Sorcerer001]

i have some new vids up on youtube www.youtube.com/nitroiggys check em out. go fast and go straight!!
gordon*

Can't begin to tell you how stupid it looks to stand RIGHT BEHIND a rocket car upon ignition. Probably one of the fastest ways to draw negative attention to this aspect of the hobby.

[z-man280]

i think it was just the camera there......

[Sorcerer001]

Nope. Watch more of the videos - the dude couldn't be standing more than a few feet behind the car, and actually recoils and kicks his leg back.

[rocketworks]

well hi there,apparently,you don't have a CLUE!!! these cars are built to be safe,the motors are safe,and i trust everything i build and put my name on and STAND BEHIND ALL OF THEM!!!,come on down and drive one YOURSELF!! as far as this aspect of the hobby as you say,these cars are not a toy car on youtube with a rocket taped on top!!!!go after those idiots! there is a lot that goes into making one go straight safely and and run like they do. i wish this was a part of the hobby but with guys like you around it will never happen!!Can't begin to tell you how stupid it looks to stand RIGHT BEHIND a rocket car upon ignition. Probably one of the fastest ways to draw negative attention to this aspect of the hobby.

[rocketworks]

well if nothin else,,i thank you!!! i have a bunch of orders for new cars!!! thanx again for the publicity and will even send a christmas card this year! by the way the new chassis is on youtube and i'm standin behind that one too!! thanx for helpin out!! and btw if you stood behind a nitro truck on dirt,,,it would be worse than the rocket car.thanx again!!Nope. Watch more of the videos - the dude couldn't be standing more than a few feet behind the car, and actually recoils and kicks his leg back.

[lil_general_lee]

I agree standing behind a rocket car probably isn't the smartest idea, but the flames behind most solid fuel rocket engines are fairly short. My car might not be the most technologically advanced but it's fairly safe and suits its purpose well. It works great plus it's easy and cheap to repair in case of a mishap (which hasn't happened yet).

As with anything of this nature you have to take care when and where you launch rocket cars. It's up the operator to make sure that the surroundings and car are safe to use. Always be prepared for the worst case scenario even though it probably wont happen. If your car starts a fire, damages property or injures someone your liable for it. Rocket cars can be extremely fun and exhilarating, especially because of their unique nature, but safety is paramount.

I've found that a brick behind the car will give the car a bigger kick. Also as you can see the rocket blast on the brick is fairly minimal. The photos of the car are the old style chute before I mounted it under the body.

Might not be the prettiest car around but it's a blast and keeps coming back for more.

[lil_general_lee]

Oh yeah... Forgot to mention the only downside is having to walk to retrieve them after a run :o

[rocketworks]

hey thanx for the support! i do block the car when people are around,don't get me wrong,i'm alittle crazy,not stupid!!lol i've seen youre pics before,it is one of the reasons i started to post here,thanx again and yes it is a drag to chase them down,need to train my dog to fetch!! thanx again
gordon
rocketworks r/c

[Bad boy Hobby]

We really only drag race 1/4 scale and 5th scale RC's, but heres a quick video of a few of us guys 2 weeks ago.

http://www.youtube.com/watch?v=sPuYYHmANKA

[Juiced]

Mmmmmmmmmmmm 1/4 scale drag racing....I will have to look into that!!!!

:):)


Ed

[Bad boy Hobby]

Sure, check out www.rcburnout.com awesome site if your into large scale racing!

[Juiced]

Actually I have stopped into that site, interesting place!


Ed.