Posted by cptdragn |
Jun 12, 2010 @ 10:29 PM | 12,302 Views
Had a 200% fan fold foam F22 that I have had for about a year now. its my fun plane as its a real floater yet had a bit of speed when needed. I was running a Hobby city 1200 kv motor on it with a 30 amp ESC and a 9x4.7 prop. On 3 cells it flew great with the ESC and motor only slightly warm. I decided to try it on 4 cells but didn't change anything else. It seemed to fly fine for a bit and then during one 5-10 sec WOT I saw a small puff and then the plane just floated down with no inputs able to be seen.
As I was walking to retrieve it, I noticed that it was starting to smoke a bit. This turned into allot of smoke and my first thought was the 4 cell was toasting itself. As I got closer the plane started to burn. By the time I was able to get to it, it had burned a fairly large hole in the electronics area and fried the wiring to everything but the battery. That seemed to come though with nothing more than a few scorch marks. The motor seemed to be ok and the glow wire was alright as well other than the wires being melted and the controller having the wires melted. Spektrum AR6100 Receiver was melted but I removed the case, soldered back the wires and its works as before.The ESC however was toast. it was completely burned up.
I was able to save the motor, battery, glow wire, glow wire controller and all servos. The plane along with the ESC were destroyed. I took a few photos before I striped out what was left of it.
Point of the story is, IF you are going to try a bigger battery, make sure you take into consideration that you DO have to take prop size into the equation.
Had I done so and ran a smaller prop. I would most likely still have the plane intact.