6399U ( KR2S ) has been flying now for 10 years, the first 2 wo the belly board. All I can say is the difference is remarkable, if I need to I can get down on an 1800' runway I can, and wo I used up at least another 500' minimum. With the KR it's all about killing the float. I tried brakes with and wo holes-------I think the holes helped. Kenny Kutztown, Pa
--- On Mon, 9/27/10, laser...@juno.com <laser...@juno.com> wrote: From: laser...@juno.com <laser...@juno.com> Subject: KR> Cruise Speed/Dive Brakes To: kr...@mylist.net List-Post: krnet@list.krnet.org Date: Monday, September 27, 2010, 2:55 AM I've always assumed cruise speed meant, for a normally aspirated engine, full throttle at 7-8 thousand feet. ********* My belly board has holes. It came that way. A long time ago I was wondering if it would be more effective if I filled in the holes and so did some research regarding why WWII dive bombers had holes in their drag surfaces. It turns out that lightening the metal was a consideration, primary however was that without the holes the planes became very difficult to control once in a dive. Putting holes in the metal helped with this control issue, but it also reduced drag. I found that in covering up my holes with tape did make the drag flap more effective. The tape was a periodic hassle to replace though, so until I get around to cutting some wood to exactly match the various-sized holes - that is to say, doing the job correctly - I'm living with the holes. It only goes down about 45º degrees, if that, and does not make a lot of difference. But it helps, so I always use it. Jim Morehead's has the right idea for a drag flap. It is large, goes down to almost 90º, has a very nicely designed deployment lever, and worked beautifully. It really slowed the plane down with no fuss. I would copy Jim's design if I were building a KR with a belly drag flap. Mike KSEE ____________________________________________________________ Moms Asked to Return to School Grant Funding May Be Available to Those That Qualify. http://thirdpartyoffers.juno.com/TGL3141/4ca04025a704b1e6676m04vuc _______________________________________ 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
