Marc, Please do a bit more research as to the placement of the mains than "not falling on it's tail any more". It has to be a certain distance behind the CG and center of momentum to have the correct benefit of nose wheel aircraft.
M. ________________________________ From: KRnet <krnet-boun...@list.krnet.org> on behalf of Marc Baca via KRnet <krnet@list.krnet.org> Sent: Wednesday, August 17, 2022 3:36 PM To: krnet@list.krnet.org <krnet@list.krnet.org> Cc: Marc Baca <mbf...@yahoo.com> Subject: Re: KRnet> Tri wheel conversion Hello All; I have an aluminum gear on my KR-2 (N13UG) in tail dragger configuration ... and despite all the advice against making it tri-gear, ... I intend to simply flip the mounts to the back of the forward spar, and mount the nose gear... then install hydraulic brakes while I'm in there. If the plane tilts backward with me in it.. I will consider installing rearward facing extensions on the gear to put the wheels an inch or two back. Picture taken at Chino Gathering ... sitting next to Colin Hale's former plane. Marc Baca Chino, CA On Wednesday, August 17, 2022 at 09:42:17 AM PDT, Mark Langford <m...@n56ml.com> wrote: Sid Wood wrote: ....the new airfoil developed for the KR-2S is about 1-inch thicker at the root section. The extra thickness requires an extra tall spar at the center spar location; keep that in mind when bolting gear leg brackets to the center spar. You may be referring to the AS5048 airfoil, rather than the AS5046 airfoil, which was intentionally designed to leave the main spar at stock dimensions with respect to the main spar. >From the "new airfoil" website at http://www.krnet.org/as504x/templates.html The AS5046 profile is a best fit for stock KR2S spars. If your spars are already built, you would want to use the AS5046 airfoil. It uses a stock aft spar and a slightly taller main spar, which could be heightened by laminating an extra .125" thick strip of spruce to the spar cap. The aft spar would also need to be moved up about an inch with relation to the fuselage due to differences in the RAF48 wing shape and the lower incidence that is optimal for the wing. Each airplane varies, and correct incidence will only be achieved using the level lines on the templates, rather than measuring up from the longerons. Several people have cut their aft spars out and raised them, and I'm told it's about a 3 hour job. Adding an eighth of an inch of leftover spruce spar material to the top of the main spar is not a show stopper, by any means... Mark Langford m...@n56ml.com<mailto:m...@n56ml.com> http://www.n56ml.com Huntsville, AL -- KRnet mailing list KRnet@list.krnet.org<mailto:KRnet@list.krnet.org> https://list.krnet.org/mailman/listinfo/krnet
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