Oldbaldfella

Once again, many thanks all!!! The 1050kv is now installed and successfully maidened yesterday. There have been some staggering amounts of thermal lift down here recently which hopefully will continue.

Thanks for all that. I have just installed a 1050kv and a mate at the club has a watt meter which we can try so........ I have to say, the lower kv motor seems to be pulling much stronger. Weird! Much obliged.

Posted by Allan Bennett on 22/07/2013 08:44:11: Posted by Oldbaldfella on 21/07/2013 10:10:29: ... I bought the Phoenix 2000 electric glider airframe from HK, a 1450kv brushless outrunner to power it, a 25-30a esc and a 1500mah 11.1v lipo. On the end of it is a 10" folding prop as supplied. ... Thanks Allan. Can I go back to ic, please? You've got good advice so far, but you also need to be aware of the volt and amp rating of your motor. There's quite a few 1450kv motors around, and there may be some that can handle your 10" (10" by what?) prop on 3S supply. though lower kv would be better, as has been mentioned. For any given motor, battery voltage and prop size (diameter and pitch) are the factors which determine how many amps the motor will draw. Usually you can get a good idea of the right prop either from the motor manufacturer's page (if they quote a range of sizes, and a range of volts, the largest prop will correspond to the lowest voltage), from calculators, or from other users. But you should always check your actual setup with a wattmeter, for manufacturing tolerances in motors and props can make a difference.

Posted by Frank Skilbeck on 21/07/2013 23:57:35: I've also posted this link before, it's a free (yes free) motor/prop/battery calculator, if it doesn't have you exact motor in the database then just pick one with the same Kv you can then get an idea of the motor rpm and amps it will draw. I have found the results to be pretty close to actual readings on my combos. But a 1450kv motor on a 3s lipo will be trying to turn prop at over 14,000 rpm, would be like having a pylon racing 40 in the nose of you electric glider.

Many thanks

Thanks Phil. If I remember right, smaller kv for a bigger prop? What kv would you recommend for that size prop? Cheers.

Hi, recently took the plunge with my first effort at putting my first electric powertrain together. Unfortunately all I ended up with was a smoking engine! I bought the Phoenix 2000 electric glider airframe from HK, a 1450kv brushless outrunner to power it, a 25-30a esc and a 1500mah 11.1v lipo. On the end of it is a 10" folding prop as supplied. Giving it a trial blast in the garden, not many seconds of full power resulted in a smoking engine. I do not believe they are meant to do that! Where did I go wrong, please?

Posted by Garbo on 11/11/2012 08:46:34: I found it titillating and a little cheeky

Go for it with the WT! they are (from what I have learned on this forum) almost indestructible!