I'll get by with a little he4lp from my friends - RCCanada - Canada Radio Controlled Hobby Forum
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Electric Flight Discuss Electric Flight in Canada

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Old 10-19-2009, 05:48 PM   #1
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I'll get by with a little he4lp from my friends

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If it's good enough for Harper it should be good enough for me.
I have tons of questions about electric flight. It seems occult. Nobody seems to speak the same language. I can understand the ESC thing, but motors are a different subject. Does anybody have a site or know of one that will allow me to ramp up on this subject. For instance, I have a PT40 from Great Planes. Can I convert this to electric? I have a Turnigy C3542, specs;
Model: SK35-42 1250
Kv: 1250rpm/v
Turns: 4
Resistance: 30
Idle Current: 1.9A
Shaft: 4mm
Weight: 142g
Rated Power: 630w

Any help would be appreciated. I hate asking for help when I cpould just as well get all the info I need from an Internet site. Thanks
ESC: 45A
Cell count: 3~4 Lipoly
Suggested Prop: 8*7,9*5,10*4
Power equivalent : .30 to .40 glow engine

and a;
TP BSC n65A Speed Controller
Max Current: 65A
FET : 15
Timing : 2/7/15/30
PWM : 8K
BEC: Opto only. No BEC
Battery Size : 4 to 6 cells Lipo.
Weight: 40g

We understand that the label of the ESC shows 70A, however we feel its best not to push this ESC past 65A.
Always run your ESCs below maximum current rating.
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Old 10-19-2009, 06:14 PM   #2
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Re: I'll get by with a little he4lp from my friends

Quick answer....yes, you can convert your PT40 to electric, but no, that motor is nowhere near enough power for you. I'm a bit rushed right now but there are lots of smart guys here to help. try going to the Eflite site...it will help recommend a motor size based on the weight of your plane and the type of flying you hope to do with it...good luck.
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Old 10-20-2009, 11:17 AM   #3
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Re: I'll get by with a little he4lp from my friends

If you want to stick with Turnigy motors then this is the one for a 40 size glow conversion :-
TR 42-50A 700kv Brushless Outrunner / 720W
You can use a 12X6 prop and have gobs of power with a 4S 20C~25C battery. Use the 65A ESC.

If you see me inverted, I'm not doing 3D ....
If you see me 3D flying, something went wrong!
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Old 10-21-2009, 01:40 AM   #4
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Re: I'll get by with a little he4lp from my friends

Mike Anderson is the current Chair of the MAAC electric committee, his address is:
Anderson, Mike
E-mail Address(es):

Mike is from the Ottawa area and is very knowledgeable about Electrics. He also lurks here, give him an enmail and try and connect up with him.
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Old 10-30-2009, 08:25 AM   #5
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Re: I'll get by with a little he4lp from my friends

Also, that ESC, Electronic Speed Control has no BEC, Battery Eliminator Circuit. You'll either have to put in a separate batt. to power the rcvr and servos, or get a UBEC Universal Batt. Circuit that will enable your rcvr,servos to run off the same batt. as your motor. Something like this.
Tried for my kamikazi pilots licence. Flunked the test.
MAAC 5276
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