Author Topic: Electric Motors (Read 1241 times)

Jim Pollock · « **on:** May 11, 2006, 08:43:19 AM »

In the world of electrics the AXI 2826/10 is the rough equivelant to a RO Jett or PA .40 or OS .40VF engine, correct?

Are there any electric engines that equate to .60/.61/.65 engines?

If so what are they, how much do they cost and how many watts does it take to keep them going for a 6.5 minute flight at a constant level.

I guess curiosity killed my piggy and he was wondering about answers to these questions.

Jim Pollock

frank carlisle · « **Reply #1 on:** May 11, 2006, 09:09:19 AM »

Jim,
My guess is that you may post this on another site and find the link I'm putting here. Whatever the case may be........here is a link to get hold of Will Moore,

wmflyelectric@verizon.net

He'll have your answer.

Igor Burger · « **Reply #2 on:** May 18, 2006, 01:45:21 AM »

It is little bit problem, as producers has a gap in that size, but beside geared two pole motors, you can choose outrunners for the same current as that AXI, but for 6 cells instead of 4 in serie. Means it will take the same current and battery capacity, but 1.5 x higher voltage and so also power. It will bring you from .40 to .60 size airplane.

The example can be 185g (6.5oz) heavy MEGA 600/30/7 with 640rpm/V or 175g (6.25oz) heavy MPJ 28/20-10 with 670 rpm/V. Unfortunatelly both has little more limited current because of more coil turns.

The real problem is, that this setup will need ESC wich will work with 6 cells and still having BEC circuite (not optically separated types withou 5V feeding).

May be better solution can be middle class with 5 cells and motor like 162g (5.8oz) heavy PJS 3D 2500 with 762rpm/V.

Jim Pollock · « **Reply #3 on:** May 20, 2006, 10:43:08 AM »

Igor,

Sooo, what your sayings is use the same AXI 2826/10 engine and give it more juice with a more powerful battery pack? Maybe a slightly larger prop too? Hmmmm, might try it out sometime in the future!

Jim Pollock

Igor Burger · « **Reply #4 on:** May 20, 2006, 12:44:40 PM »

No Jim, I do not think that AXI has chance to give more. It has limited current to 40A and rpm to 12 000 so you cannot go to higher voltage or higher current. I think it will need some of those other motors.

The only theoretical chance with that AXI could be prop 13x6 or so with 5 cells and let it accelerate for necessary power only after launching with some clever timer, so it will really draind maximal 40A whole the flight but it will not be overloaded on ground before. But I am only guessing.

Jim Pollock · « **Reply #5 on:** May 20, 2006, 04:54:35 PM »

Igor,

O.K. use a bigger motor then, right? With more current from the battery pack to fit the motor. Sheesh, i'm haveing a hard time trying to keep up with those electrons!

Also, I find it extremely funny that your listed as a 'new pilot'! I think there should be a "super ace" category for those who have finished in to top 10 at a World Championship!!!

Robert, Igor is a "Super Ace" - not a "New Pilot"

Jim Pollock

Igor Burger · « **Reply #6 on:** May 21, 2006, 01:14:47 AM »

Sometimes I feel myself as a new pilot - at least every spring first flight with shaking knees looking what that model does an unepenced things.