My what a big motor you have

"Jayhawk Jake" (jayhawkjake)
11/10/2013 at 11:02 • Filed to: None

Soon....for reference, the motor on the right is going on a 15 pound biplane, where it's predicted to put out on the order of 3.35 horsepower.

DISCUSSION (19)

Agrajag > Jayhawk Jake
11/10/2013 at 11:25

Go on, tell us more.

Sun-Tzubaru - With Zoom-Zoom > Jayhawk Jake
11/10/2013 at 11:30

Was building a quadcopter last spring, the brushless motors i was working with were alot smaller but damn did they terrify me when I got the props spinning

Eazy-O > Jayhawk Jake
11/10/2013 at 11:35

Did you get the power projection from the 2700W input *0,93 efficiency * 1,34 for horsepower conversion? :)

This is fairly interesting to me, as I was looking at some motors designed for electric bikes, and they're more along the lines of 250-500-1000W, I believe. As for price, this BigFoot160 seems to go for around 55$ on sale or 90$ regular price, which is still cheaper than the bike motors. Sure, those come in a hub, ready to go, but still...

Jeremy Bloyd-Peshkin > Eazy-O
11/10/2013 at 11:44

I've done kart builds with R/C airplane motors for power. You can get a surprising amount of power out of them. I do know that a lot of people use them in ebike builds. If you haven't already, you should check out the endless sphere forums.

Jayhawk Jake > Eazy-O
11/10/2013 at 11:50

No, I used a calculator online called ecalc. It does more than just power estimation and takes battery and prop size into account. For my planned setup it's predicting right around 2500 watts

Jayhawk Jake > Sun-Tzubaru - With Zoom-Zoom
11/10/2013 at 11:52

I've got 4 electric airplanes now, but even then this guy is a bit intimidating, in every way. 18 inch prop, 37 volts at 80 amps, 2.5 kW of power....safety will be paramount.

Jayhawk Jake > Agrajag
11/10/2013 at 11:54

Eazy-O > Jeremy Bloyd-Peshkin
11/10/2013 at 11:54

Very interesting, will look into the stuff. Thanks for the info! :)

Eazy-O > Jayhawk Jake
11/10/2013 at 11:55

Ah, nifty. Should come in handy, thanks. :)

Jayhawk Jake > Agrajag
11/10/2013 at 11:56

Well, thanks kinja...

Here's the plane it's going on with a gas motor, next to another one of my planes, the Believable Hulk

Agrajag > Jayhawk Jake
11/10/2013 at 12:08

Those are cool invisible planes.

I feel kinja has got the better of you today.

Jayhawk Jake > Agrajag
11/10/2013 at 14:07

Kinja'd!!!

One more try

Agrajag > Jayhawk Jake
11/10/2013 at 14:42

That's awesome. You should put a purple accent on the Believable Hulk somewhere to represent the shorts.

tromoly > Jayhawk Jake
11/10/2013 at 22:12

Gotta love brushless outrunners. What voltage are you planning to run it at?

Jayhawk Jake > tromoly
11/10/2013 at 22:52

10S1P, so 37 volts

tromoly > Jayhawk Jake
11/10/2013 at 22:54

Gotcha, that's one big LiPo pack.

Post a picture when done, this sounds killer.

Jayhawk Jake > tromoly
11/10/2013 at 23:00

It'll be 2 5 cells in series

tromoly > Jayhawk Jake
11/10/2013 at 23:04

SAE Aero Design competition, by chance? We don't have it at my school, have always been curious about what all it entails.

Jayhawk Jake > tromoly
11/11/2013 at 00:33

No, just for fun.

Some people I knew did sae aero design while I was in school, but it was internal combustion at the time. I did AIAA design build fly which was a whole other animal.

As I recall, aero design is all about designing a plane that fits a certain set of dimensions and carrying as much weight as possible. In that case power to weight doesn't need to be nearly as extreme as my sport planes, this motor could probably lift 30-40 pounds with the right design.