Gentlemen,
Need some advice on my OS 91 VRDF. Here the facts
Fuel 16 % syntetic oel, no nitro !
Tuned pipe, length 43cm
Prop 11x8 Zinger shorten to 10
RPM 16.600
Transition from idel to max RPM is excellent
I have run the engine a few times on the stand, most likely 30 min in total.
What worries me is
a) The quite low RPM..was expecting to be closer to 18.000 or 19.000
b) the fact that at the high speed needel is only half turn open (never had to close a needle that much to peak an engine)
c) the enormous pressure that the pipe is producing, I was scared my tank will explode
Could it be that the pipe is to small ? that this will cause the huge pressure and this also explains the strange needel setup ?
Please share your thoughts with me.
rgds
Gordon