Several causes of flutter. However, any malformation of the elevator, depends on the malformation. Exceeding Vne coupled with excess loading factor and all bets are off.
----- Original Message ----- From: "larry flesner" <fles...@midwest.net> To: "KRnet" <kr...@mylist.net> Sent: Thursday, March 18, 2004 5:14 AM Subject: KR>aircraft performance / balanced elevator > I am interested in what speeds > >aircraft are attaining with out mass balancing of the elevator as my > >elevator is built and what peoples oppions are as flutter can be destroy an > >aircraft inflight! > >Ross > ++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > Ross, > > I think a lot of apples and oranges are being mixed here. > > Flutter can happen at any speed and is not JUST speed related although > speed can be a major factor. The engine size is irrelevant to flutter other > than it's relation to speed and finally, balancing the elevator has nothing > to do with aircraft stability other than the probably modest affect on CG. > > I"m using an 0-200 and because of several variables my KR is slower than > most using that engine. Without wheel pants I'm getting a solid 150+ mph > cruise. I'm in the middle of the CG envelop with me ( 200 lbs) and full > fuel (25 gal in wings, no header). My plans size trim tab seems to be > suffecient in the CG range I'm flying in but a similar KR which flies in > the forward part of the CG range runs out of trim authority with a standard > size tab. I think the standard size KR2 with an 0-200 is probably getting > close to an honest 180 mph cruise and the 0-200 will probably burn > 5.5 to 7.5 gal per hour, depending on the power setting. > > The elevators can be externally balanced and made to look good. > Weights can be added to the ends of the elevator and extend > forward along the edge of the horizontal stab. > > As to the Vne, I'd guess there are more factors limiting the Vne than > elevator flutter but hey, I'm not an engineer. > > I almost forgot, I did balance my elevators. > > Larry Flesner > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
