So what was done to improve the ballance? Brian Kraut Engineering Alternatives, Inc. www.engalt.com
-----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Joseph H. Horton Sent: Monday, November 13, 2006 12:06 PM To: corvaircr...@mylist.net; kr...@mylist.net Subject: KR> Re: CorvAircraft> Corvair College I hate to correct Mark about his own plane but my under standing was that Marks's balance started out worse than mine and Phil's by 4 times but ended up near perfect at .004inches/second. Mine and Phil's ended at about .028 inches/second knowing that anything under .030 is the threshold for Arnold to consider the job correct. Our planes are still in Florida but we are home safe. Even if I could have gotten home without rain yesterday the surface winds would have destroyed me for sure. Joe Horton On Sun, 12 Nov 2006 21:09:51 -0600 "Mark Langford" <n5...@hiwaay.net> writes: > VairHeads, > > This is a quickie report (I'll let others fill in the details), but > I'm back > from another excellent Corvair College. The new format of WW > building an > engine from start to finish with a running commentary was excellent, > > resulting in a great education for engine builders (see > http://home.hiwaay.net/~langford/corvair/cc2006/061112326m.jpg ). I > wish I'd > listened in on more of it, but also enjoyed talking to other pilots > and > engine builders. I met some more great folks, as usual. I'm sure > Grace > will work up a web page when she gets a chance. Those of you who > missed it > really missed a good one! > > Those who noticed the exhaust leak on my number 4 cylinder may be > relieved > to know that I made it back without succumbing to carbon monoxide > poisoning. > I had a 40 mph headwind much of the way on the way back (and it > would have > been worse had I gone to my usual 10,500'), so it took me 5 hours of > flying > to get back home, although the weather was great otherwise. I > occupied > myself with some testing at 7500', since it was a 59 degree OAT day. > Based > on what I learned today, I'm about ready to claim 162 mph as my > "cruise" > speed at 75% power. > > Something I'm on the hook for is a report on how the > engine/prop/spinner > balancing went. Ever since I put my homemade spinner/backplate on, > I've > wanted to have it balanced. Arnold Holmes hooked up his vibration > equipment > and measured the vibration levels on my engine. He started out at > something > like .500 inches/second (don't ask me to explain this) and ended up > around > .040" (I believe it was). I was skeptical that I'd see much > difference, as > I already thought it was a pretty smooth engine. Once settled in at > > altitude on the way back, it was absolutely amazing how smooth it > was. I > balanced a little flashlight on end on top of the panel, and it > stood there > for two hours until I dropped down into the turbulence to land at > M38. The > exhaust pulses on the bottom of the plane are now the primary source > of > vibration, not the engine. It feels so much better that I flew the > last > hour with the engine wide open, and it was really singing. It was > less > buzzy and really felt happy at any rpm. This is a real improvement, > and I'm > not just saying that. > > Other news is the cat's out of the bag on how bad my landings really > are, at > least with a passenger and full fuel. Fifty witnesses at least. > Nobody saw > the squeaker on this end, however... > > Mark Langford, Harvest, AL > see homebuilt airplane at http://www.N56ML.com > email to N56ML "at" hiwaay.net > > > > > _________________________________________________________ > search the CorvAircraft archives at > http://www.maddyhome.com/corvairsrch/index.jsp > to UNsubscribe from CorvAircraft, send a message to > corvaircraft-le...@mylist.net > Other CorvAircraft list info is at > http://www.krnet.org/corvaircraft_inst.html > > Joe Horton, Coopersburg, PA. joe.kr2s.buil...@juno.com _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html