ORIGINAL: dupuisma
I'm using the Evolution EVO30943400 invert wrap around from Horizon Hobby. There is no discernable rpm gain with the silencer removed. I didn't use a tuned pipe because in pusher configuration the pipe would be exhausting forward.
Here are the real life data collected by me, some very interesting info on mufflers and special engine treating .
9100 3266 Skorepa prop, data Dick H
18x6 sko
8300 1:32 3266 tuned pipe, preivers
18x8 APC 13-4-04
7600 3266 tuned pipe
18x8 menz
8700 3266
18x8 proZinger
8200 3266 factory data
18x8 mej
8700 3266 zinger pro, data dick Hansson
18x6 zin P
6400 3270 gaines
16x11x3 mej
7100 3270 gaines
17x12 APC
8400 3270 gaines
17x8 APC
7300 3270 factory data
18x8 mej
6800 3298 factory data
18x8 mej
9200 3M mintor piston top and combustion chamber ceramic coated
17x10 biela
8850 3M mintor without piston top and combustion chamber ceramic coated
17x10 biela
7300 bisson reivers
18x8 mejz
7450 Bisson
18x6Wapc
7800 ks banana "
17x8 apc 28-5-07
8300 scorepa pipe 1 gallon through the engine, 4300ft
18x6 skor
8800 scorepa pipe 1 gallon through the engine, 4300ft
18x6 mej