Hello Rossan !
A stupid beginner fault. Claude (the guy on photo's and owner of the Predator (RIP)) bought a 2nd hand battery. He did not check it. Result : one cell got a memory effect. An other mistake for me is to fly with 4 cells battery (4,8 v). I better like to use 6,0 v with a volt regulator.
I won't tell you how bad he was feeling after the crash. :bananahea To give him a help, I took his engine home and repaired it.
Voilą, voilą,
Have a look on the photo's...
Salut !
J.-Yves.