Danny this is a massive help,thankyou so much! However, the ESC is doing the same on a 1900mAh 8 cell which indicates the battery is not the problem. It's definately the over heating of the ESC though that is causing it to cut, motor and battery aren't even warm at this stage. The ESC takes 40amps continuous and 60amps max, however it is one from an electronics company in hong kong and maybe of inferior quality. A lot of people on this forum and other Magister forums are using the AXi 2810 with batteries like the GP3300 and they are using ESCs like the Jeti 40 or the CC Phoenix 45 with 11x7 props and don't seem to be having problems like me...I really think it's just because I have a budget ESC.

Does a larger prop generally mean the current is higher??

Kind regards
sam