Sweet! It's good news for us still building.
Fred Johnson Reno, NV -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of Mark Langford Sent: Tuesday, March 13, 2007 7:45 PM To: KRnet Cc: Corvair engines for homebuilt aircraft Subject: KR> 3100cc vs 2700cc Corvair engines VairHeads, Yesterday was a calm day, so I did a four way GPS run at 7500' at wide open throttle to see what the new 3100cc engine would do. Bottom line was 172 mph at 3740 rpm, which agrees nicely with indicated airspeed after pressure and temperature correction (TAS). If nothing else, this proves my airspeed indicator is deadly accurate, since I got this same number this weekend without the GPS. I found a similar run done last April using the 2700cc engine, where I got 160 mph at 3390 rpm. That's a 12 mph difference (which is about what I'd expect) and a 350 rpm gain.
