20-10-2009, 08:42 PM
On the subject of motor power...
I don't have a wattmeter but I do have a Current Clamp meter - so I ran some tests myself.
My Lark Glider has a Turnigy SK35-36 910KV motor with a 12X6 prop & pulls 26A at Full throttle.
Some quick calculations... 11Volts X 26Amps = 286Watts. Good enough for a 1.5Kg trainer and reasonable battery life.
The other Plane I'm currently converting from Nitro .25 to Brushless on the other hand pulled a few more amps than I expected!
It has a similar motor - SK35-36 1400KV. I went with the faster motor as this plane can only fit a 9 inch prop due
to ground clearance issues (Tricycle gear). I first ran full throttle with a 9X7.5 prop to find it pulling
50 amps from my 2.2 battery & 40A ESC.. oops! Quickly changed to a 9X6 prop and found the amps drop to a more sensible
40 amps (440Watts). I think that should be adequate this other High Wing Trainer with similar dimensions to my Glider.
I think this one may be quick - I'll ask Darren to test fly this one as well (should be ready in a week or 2) and see what he thinks.
I don't have a wattmeter but I do have a Current Clamp meter - so I ran some tests myself.
My Lark Glider has a Turnigy SK35-36 910KV motor with a 12X6 prop & pulls 26A at Full throttle.
Some quick calculations... 11Volts X 26Amps = 286Watts. Good enough for a 1.5Kg trainer and reasonable battery life.
The other Plane I'm currently converting from Nitro .25 to Brushless on the other hand pulled a few more amps than I expected!
It has a similar motor - SK35-36 1400KV. I went with the faster motor as this plane can only fit a 9 inch prop due
to ground clearance issues (Tricycle gear). I first ran full throttle with a 9X7.5 prop to find it pulling
50 amps from my 2.2 battery & 40A ESC.. oops! Quickly changed to a 9X6 prop and found the amps drop to a more sensible
40 amps (440Watts). I think that should be adequate this other High Wing Trainer with similar dimensions to my Glider.
I think this one may be quick - I'll ask Darren to test fly this one as well (should be ready in a week or 2) and see what he thinks.
John Jelovic
Planks: Lark, California 28, Skyartec Cessna 182, Skyfun, Extra-300S EPP 3D, Stinger 64 EDF, Rare Bear 1400mm,
Durafly P51 Mustang, Edge 540T 3D.
Helis: Blade mCPX, Blade 450X, HK450GT V2Belt, Gaui 550 Hurricane.
Spektrum DX9, DX7se & DX4e