The Roto 25 I setupwith one of Ed Skorpa's carbon fibre pipes . ESCOMPOSITES
I did not tune for max power -but for a throttlable performance.
the prop I used was 17x6 and ran it around 9000.
IF I use the in air readings the rpm goes way up( engine has a tattletale tach - these guys are way ahead of the crowd on this feature.)
I di not use big props as this was a 3D model and the prop NEVER unloaded much at all -I held speeds very low.
The pipe weighs 3 ounces.
Nobody has anything like it-so tuning lengths would not relate well.
The all up weight was 10 lbs and it took most of the power to to pull away from a hover .
The smoothness was a big factor in using this setup - I beefed up nothing on th model -as it works with 1.2-1.4 YS engines and these can shake far worse.
Power is about (sorta ) like a 1.2 fourstroke YS. So tho the setup will work -it is not a slam dunk , bolt it in n go 3D setup.