OS .46 FX - Weak?
The OS FX.46 I have is by far the most powerful .46 I have. All though I have a tach. I usually use my normark digital fish scale to measure the thrust of the engine. I do this by connecting the scale to rear of the airplane an go full throttle on the engine and measure pull ( thrust) on the scale in lb and oz. With the FX.46 with a master airscrew 11x7 prop I am measuring 6lb 5oz which is over 10oz more then any of my other engines and that was on a very hot day. The other engines I have our tt.46, fox .46abc and a mag .53 they all measure around 5and1/2 pounds of thrust with 11x6 props they won't ever pull a 11x7 with out starting to over heat. The other engine our fine, run great but just don't have the power of the OS.
biker