How do I get more watts out of my setup?

[Ken Cz]

I am currently benchtesting a new plane to check power output.
Specs as follows:

Battery: Lipo 11.1 v 4200 mAh 15C
Motor: Eflite Power 32 rated for up to 700 watts.
Prop: APC 12x8 E.
Aircraft all up weight: 5.0lbs
ESC: Venom Air Corp 60 amp.

Using the above setup and putting my whatt meter in line I get the following readout at full throttle:

Amps: 30.3
Watts: 320 :mad:
Batt. V: 10.57
Since I was targeting about 100 wats per pound for the performance I want the 320 watt is not even close and comes out to just 64 watts per pound.
Barely enough to make a good trainer and sure not enough to get you out of trouble.

Question is: How do I get more watts since the motor is rated at 700W max??
1. Go to larger prop such as 13x6 or even a 13x8 or larger?

2. Go to a 4S lipo at 14.8V??

3. Other options?

As always, any reply from the more experienced flyers is always appreciated.

Thanks,
Ken :confused:

[aeajr]

Depending on what kind of flying you plan to do you could go to a biger and/or a deeper prop. You don't mention the palne or the type of flying you plan to do.

A larger prop of the same pitch will give you more thrust, more pulling power. Good for towing or for strong verticle climb. A larger prop will pull more power = more watts.

A deeper prop, going from a 6 pitch to an 8 will give you more speed. This will also pull more power = more watts.

Depending on your grond clearence of the landing gear, you might go to a 13 or 14 inch prop or a 9 or 10 pitch, or both.

Usually motor makers provide some guidance as to what size props the motor should use. That should provide some guidance.