KRnetters: The 1st Cardinals had laminar flow Wings which gave very little stall warning and the also had problems with an Elevator Stall. however they had a "Flying Tail"
The "Elevator Stall" was cured by an "Mandantory" AD which required the installation of a leading edge slot in the elevator. This might be anothe approach but I do not know and have not been able to find much guidence on slot design for eithe wings or elevators. Don ------------------------------------------------------------------------ countryhomeprint wrote: > KR-netters > > After consulting with the Aerospace Department at Mississippi State > University concerning the pitching up of my KR-2 upon stall approach, a > probable cause has been reached. The Horizontal Stabilizer is stalling prior > to the wing stall. This may be caused by the longer wing by Dan Deihl. This > creates a very dangerous condition. There are three ways to prevent this > condition. (1) Increase the stabilizer area by increasing by several inches > the length of the stab. The standard flat stabilizer is only about 50% as > efficient as a stabilizer with a true airfoil which leads to the 2nd method > of prevention. (2) Change the stab airfoil to a true airfoil which will > increase the efficiency of the stab. And (3), Don't stall the aircraft, keep > the airspeed well above stall. > It has been noticed that some KR-2 builders constructed a true airfoil rather > than the flat stab shown in the plans. Maybe it should be noted to other KR > builders to do the same. > You guys who have true airfoil stabs, where did you get your plans, technical > info., etc. I would like to change my stab to a true airfoil. > > Maybe if I put Armorall on my horizontal stabilizer my problem will be solved. > > I'm still finding dingle berrys after that close call. > > Bill Page > boliverp...@bellsouth.net > _______________________________________ > 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
