ORIGINAL: mpascual
I'm very impressed with the performance and reliability of this engine. It can turn little props at hi rpm. (> 16.000) or a big 14x7 prop at more than 9.000 rpm without overheating.
Almost 14.000 rpm with 11x6MA.
Looks *very* similar to the OS AX series (a copy perhaps?)
Do you have figures for the APC 12x4 prop -- since I fly mainly 3D this is my benchmark.
A good TT46Pro with Tower/GMS47 muffler will turn one of these at a hair over 14,000 RPMs on 5% nitro.
I expect that the 12x4 APC is a similar load to the 11x6MA -- if that's the case then the figures you quote aren't too impressive for a.56-sized engine. My ASP52 turns a 12x4 at about 14,400 RPMs on 5% nitro.