ORIGINAL: efish
How much AUW should a 26cc plane have for reasonable 3D performance?
It might have been better to put it in a separate post to get more responses.
See Quique Somenzini's report and flight video of his 73" Yak 54 powered by an Evolution 26cc Engine at
http://www.somenzini.com/html/aircraft/yak73report.html .
His plane weighs 11.75 pounds and does 3D very well even though the pull out from a hover is marginal with the standard Pitts style muffler.
My 76-inch Ultra RC Giles 202 weighs 11.5 pounds but has far better pullout with a piped MVVS 26cc (same engine as Evolution 26cc). The pipe makes a significant difference. My tachometer reads 8740 - 8800 RPM with the engine turning an APC 18x6w prop.