Shop our Airplanes Products Drone Products Sales
May 19, 2001, 05:21 PM
Frequent User
yb2normal's Avatar

Great Planes C-20 ESC failure

Wondering if anyone else has had a mysterious failure of their C-20 ESC's. I had flown my little scratch build flying wing through 2 batteries, and was on my third, when something strange happened. I had throttled back after turning the plane to do a low pass, when all of the sudden the plane went to full throttle . A few seconds later the motor cut out all together and I had no control of the plane. Fortunately the elevons twitched themselves into a nice flat gliding circle and I recovered the plane, no damage (it certainly didn't hurt that the wheat it landed in was waist high ). Opening the plane I discovered that something had shorted out on the ESC, unsoldering the batteries negative lead and one of the MOSFETs. Removing the clear plastic cover (which had melted open anyway), showed a few components had also unsoldered.

I know my battery was plugged in correctly, since I had been flying the plane for almost a minute.

Anyone else out there have this happen?
Sign up now
to remove ads between posts
May 19, 2001, 09:52 PM
AMA 697691 / FAA 13675
My C-20s (2 of them) seem ok.

What was your power system (motor, prop, pack) that you were using with it?

Did you install the schotky diode?
Latest blog entry: Greg's Web Hangar
May 19, 2001, 10:13 PM
Frequent User
yb2normal's Avatar
First two packs were 7 cell kr600ae's.
The pack on the fateful flight was 7 cells 1100mah NIMH pack from Hobby Lobby. Motor was a Permax 6v Speed 400 direct drive to an APC 5.5x4.5 "electric prop".

I didn't install the diode because I understood from the directions (and an article here on ezone) that it wasn't required.

Thanks for any advice you can give

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Great Planes C-20 Mini High Frequency ESC w/BEC a2zprod Aircraft - Electric - Airplanes (FS/W) 4 Feb 01, 2003 11:38 PM
Great Planes C-20 ESC problem; did I re-wire it wrong? e-sailpilot86 Power Systems 1 Nov 29, 2002 11:39 PM
FT: Great Planes C-20 ESC 3dben Aircraft - Electric - Airplanes (FS/W) 5 Aug 04, 2002 11:45 AM
FS: Great Planes C-20 ESC (Used) 3dben Aircraft - Electric - Airplanes (FS/W) 1 Jun 17, 2002 09:30 PM
Great Planes C-20 ESC Trouble Sal C Electric Plane Talk 6 Jul 30, 2001 07:52 AM