OK - let me see if I can help. I have a standard KR-2 with flaps. First off the flaps as built per plans will not pitch the nose down! They do not have the area to being even close to doing that - about the only thing they can do for you is marginally help stabilize your air speed on final. I haven't found any help in deploying them on take-off, the only benefit I have found is that two notches will help you get the tail up when operating at gross. Now all that being said I was able to make a rather simple modification that probably made my installation twice as effective and that was to add a center section flap that fills the gap between the flaps across the bottom of the fuselage. I can supply pics if you wish but it's simplify a piece of reinforced 1/8" ply that is hinged off of the flaps inboard hinge points with a third center point added. The ply has tabs on the ends that the flaps engage and the center section flap is deployed along with the flaps. I get about a 6 kt reduction in stall speed with the flaps fully deployed. Larry is right on his post the only good numbers that are meaningful are going to be ones you generate in your Phase I testing - Best advice I can give is to do you initial testing on a 4,000 foot field - I prefer turf myself it's more forgiving. Then once you have a feel for the airplane shorter fields become a possibility.
My apologies for not trimming the original note - but it's seems pertinent to leave it in its entirety. Rick Human N202RH Houston, Tx -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of Dave Dunwoodie Sent: Saturday, August 21, 2010 6:02 PM To: kr...@mylist.net Subject: KR> Flap Effectiveness - 2nd Pass Many thanks to everybody that responded! However, I didn't really get the information I was after. I am looking for pitch up, pitch down information when the flaps are deployed, as well as effective slowing numbers correlated to percentage of flap deployed, stall speed changes, recommended flap settings for takeoff from short field, etc. For example, with full flaps deployed, doing slow flight, what stall speeds are you getting? How effective are the flaps for landing, and what are the numbers? Would you use no flaps, or 1-2-3 notches of flap for takeoff from short field? If you used flaps for takeoff, at what speeds would you being them back to zero? In my Warrior, I have all sorts of numbers available to me to make decisions with, but in the KR2, I have nothing! In the Duchess, I have the same information available, but again, in the KR2, I am trying to "write the book", so I really need input! Thanks everyone! Dave. _______________________________________ 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
