I installed gap seals, and would have to agree; I saw no aerodynamic benifit, but in my case they flutter at stall speed and so they are now my stall warning device. You results my vary. :-)
----- Original Message ----- From: "Larry&Sallie Flesner" <fles...@verizon.net> To: "KRnet" <kr...@mylist.net> Sent: Friday, May 25, 2007 4:59 AM Subject: Re: KR> gap seals > > Larry said: but I recall that there is no aerodynamic gain in covering the > >opening with the RAF48 airfoil. > > > >It is my understanding that regardless of airfoil, that the primary benefit, > >and reason for the wing gap seals for ailerons is for the benefit to climb > >rate. > >Colin Rainey > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > What I said was: > > "The bottom needs to be open when using the piano hinge > to get the correct downward deflection. Some have covered > the opening with a gap seal (easily done) but I recall that > there is no aerodynamic gain in covering the opening with > the RAF48 airfoil." > > It's the bottom opening that I was talking about. The hinge > closes the top and provides the aileron gap seal to eliminate > airflow from bottom to top or vise versa at the wing trail edge. > > I recall someone testing both the RAF48 and the new airfoil > and found no aerodynamic benefit when closing the bottom > aileron gap on the RAF48 airfoil. There was, as I recall, a > benefit with the new airfoil in the climb rate. > > It's been a while so I could be in error. If so, someone will > correct me. > > Larry Flesner > > > > > > >
