RE: Saito 125 RPM numbers
The 15x8 Graupner will be slighly too big for the YS 91FZ. My 91FZ was only able to take it up to 9100 rpm max on 20/20 fuel, backed down to 8800 rpm for flying. Here is a video of the 91FZ swinging the Graupner 15x8 at full throttle: [link=http://www.warbirdobsession.com/cmp_spitfire/videos/show_pass.wmv]Spit Show Pass[/link]