HI Larry, Not sure what you mean by "the KR is not a design that call for spoilers"? They definitely kill LIFT which takes care of the "floating problem" of the KR.. They would work on any airplane when placed in the proper location.
I've got several Moni motorgliders which utilize them and they will float like a KR if you don't use them. Originally a set of doors were installed on both sides of the main wheel pant, but the most it did was cause a nose down pitch attitude. Spoilers were the solution. If you're using spoilers, you don't have to "point the nose down to dirty up the air flow".. They will stop the wing from "flying" very effectively. In a lot of cases you actually have to keep power in to cut down on the descent rate to keep the plane flying. I know there are other homebuilt designs using spoilers. One type raises up out of the wing like a pair of scissors. The ones on my airplanes deploy like a belly board except they are on top of the wing. You don't need very big ones to kill the lift. Normally installed outside the prop diameter in the root portion of the wing for best lift killing.. All these designs work well. You just need to figure out which one you want to use, how easy they are to build/install and enjoy! Just my .02. Ron -------------------------------------------- On Tue, 1/13/15, Flesner via KRnet <krnet at list.krnet.org> wrote: Subject: Re: KR> Flaps versus belly board versus spoilers To: "KRnet" <krnet at list.krnet.org> Date: Tuesday, January 13, 2015, 6:11 PM +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Spoilers are used primarily on gliders to kill excess lift in order to steepen the approach to landing and also on large commercial aircraft to kill lift after touchdown to transfer the weight to the landing gear.? The KR is not a design that call for spoilers.? The only shortfall, if you can consider it a shortfall, is the need for deployable drag in the landing approach.? It is a very slick design that makes speed control in landing? a bit tricky.? It will also float after the flare if too much speed is carried on the approach. Effective flaps or a speed brake are both proven solutions to speed control on landings.? The speed brake is probably the simplest to build but effective flaps may offer other benefits beyond simply adding drag.? If you're building to fly, go with what's proven.? If you want to experiment and try new things, go for it............. Larry Flesner _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
