550 sized motor with torque and speed

[tl01-freak]

Check it out, this one seems to have both: torque and speed

Kyosho Aquaspeed Marine Stock:

- 550 can-size
- 18 Turn
- 500 g-cm
- Load: 26,000 RPM
- w/o Load: 30,500 RPM
- Voltage: 8.4V Current: 3.2A

It runs with 7-cells and would handle 8-cells also very well. It could do a good job in Stadium- and Monster-Trucks, what do you think?

It has twice the tourque as a 550 sized LRP Big Block:
- 12 Turn
- w/o Load: 32.000 RPM
- 270 Nmm Torque

or more RPM as a 540 sized Tamiya Super Stock TZ:

- 23 Turn
- w/o Load: 26500 RPM
- 500 Nmm Torque

Maybe we dont have to compromise between accelleration and top-speed.

[baih]

where did you see a 550 sized LRP big block ??
are all measurements at 8.4 volts ??

[tl01-freak]

Indeed, the Big Block is a 650 size, so a 550 is 15% and a 650 is 20% longer then a regular 540 and if the datas are measured at the same voltage the LRP would stand with more weight, longer can and worse datas.
Unfortunaltely not all companies say at which Voltage the motors are being tested, thats the reason why iam writing this here, hoping someone with more specific knowledge can bring light into this.

[RrR]

I would go with the Kyosho mill

[ElectricThunder]

How are you comparing Nmm to g-cm? They're two different measurements I thought. Unless you converted them.

Anyways, the kyosho may have more torque at a given amperage because the torque constant is higher because it is a higher turn, but over all, the 12 turn 550 LRP motor will probably draw more amps, and the more amps a motor draws, the more torque it creates. So on the same voltage, the LRP will probably pull more amps, and create more torque. However, you can run the kyosho on more cells and gear a tad lower, and probably get a more efficient setup without all the amps, and still come away with a higher RPM, and equal or more torque.

[tl01-freak]

The Kyosho seems to be tested at 8V, since its a 8,4V motor and would definately require 7 cells to reach those specs.
The LRP is a 7.2V motor and reaches its specs with 6 cells.
The additional weight of the Kyoshos extra cell would be comparable to the bigger 650 can size of the LRP, so the overall weight of the car would be almost the same with both systems.

[timie1]

The Tamiya Super Stock TZ is measured at 7.2 volts. I have one, I know. It would be interesting to see if it was measured at 8.4 volts.

[tl01-freak]

A dyno database where everyone can put in his datas would be great. There are enough people with dyno testers but they only test for themselfes or post it only on specific threads.
Instead of searching all the web we would have all of it on a single page with datas according to the voltage, type of dyno tester and probably multiple datas from different testers on the same motor.