true.

I am presenting my openion on a few artilces i have read written by Don of Don's hobby shop about RPM and difference between ground and air rpm. It is very insightful and i can not remember what magazine it was in, but it was very informataive. I talked to him ad nausum about it last week and he explained it even further. But it was sited by actual rpms and facts! He had a few ways to measure air rpms accurately vs. thrust ect ect.....

basically when you have wind already flowing over the prop (air rpm) it will allow the spool up to hapen quicker and your peak rpms are always higher in the air PROVIDED THAT YOUR ENGINE IS NOT TOO LEAN TO HELP FUFILL THE GAS NEEDED AT THE HIGHER RPM. So basically my 7000 rpm zenoah should be spinning around 8200 to 8500. I have bought one of the on board rpm meters and will install it to see whay happens.

I am going to try some mufflers (slimline, ect..) to see what happens first. then i will try one of those mejzliks!!!!!

Mr. Cunningham, please do not think i am trying to discredit your work or your findings. . . like i said i would love to send you some engines!!!!! I am more addressing those that worry sooooo much about RPMs and then complain when they do not have a reliable engine to bring the bird home.

i guess it should also be said that i am NOT flying 3D with this engine. . . that is why tuning ext is different. that being said, it is all about 'what you like'.

Evan