hi there that is what happens but the needle is open about 7 full turns from closed, tahs a lot aof turns,
is it posible that when in horizontal fuselage psotion it drwas enough for good all speed out and when nose up, it does not get as much fuel and dies very quickly, can it be a resricion of some strage sort , i have clenaed and checked al conections on fuel lines , can i open up the fuel niples at rear needle.?????

i have seen other people using this engine with this same prop that is teh 11 x 6

i will thinker a bit more with it today will let you know how it goes
reagrds
david