> "With all that being said, Dan Diehl once told me that he would build another KR2 and change the angle of attack of the RAF airfoil by 2 degrees, so the speed of the plane would not make it Plow through the air. And increase airspeed by the loss of drag."
Interesting Lee. Without a clear idea of what I'm thinking on this subject, that 2 degree "change" Dan is talking about must be calculated based upon a particular indicated airspeed - probably a number he chose as a "normal" cruise speed for he KR - somewhere around 150 MPH I'd guess. Just thinking out loud here . . . but if angle of attack decreases with an increase of indicated airspeed, and also with a decrease in air density . . . cruising at higher altitudes lowers the AofA for a given indicated airspeed, thus eliminating or minimizing that "plow" effect you mention. Also, I think Dan was referring to angle of incidence (wing chord in relatioship to level fuselage), and not angle of attack. AofA can be all over the place depending on speed and also depending on the angle of incidence and aerodynamic effect of a smaller or larger horizontal stabilizer. ************************ Once I've got my ADS-B stuff installed and am flying again, I'm seriously planning on adjusting my ailerons to trail in the neutral position with a 2 or 3 degree up (negative) angle. Sailplains do it so it should work for KR's too? I'll report on this someday. Surely somebody has played with this idea after all these years? As long as one is playing with ailerons, it sould sure be nice to incorporate the ailerons as flaps, ala the Robertson conversions and the Helio Courier and a number of others. That's a bigger job than I'm going to fool with but adjusting the ailerons to neutralize at 3% up when in trail seems easy enough, at least in my head. Such as it is. Mike KSEE _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/[email protected]/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to [email protected]
