Hi Gary, I can only answer for myself but mine was being built to the KR2S plans and it was only by a mistake when installing the tail post that I ended up with about 1 1/2" extra in the last bay. I would not add more to the fuselage on the foreword side of the main spar for W&B reasons as I think that at least three of us have that corvair tucked as far back against the firewall as we can get it. In addition to the W&B issues consider that every inch you add in either direction to a KR2S model is likely worth an additional pound per inch of length for no appreciable performance gain. The plane flies great at the 2S dimensions. ?? ?There are certainly other factors that drive this discussion. Are you planning on balancing the elevator? Couple pounds there. elevator trim motor. some more weight. tail light, bigger surfaces. All these things are likely to get done, you just don't know it yet and then add another bay to the back??? more weight more moment arm.... it just never ends... pretty soon you have a better boat than plane. Just trying to make it rational for you not emotional decision. I am pretty certain that Jones is really pretty stock over all size, Langford's I think is the about the same, Rob Schmidit's I think is stock 2S. I think in the final analysis that Jeff Scott's and Larry,s are also very close to the stock. maybe 6" over all longer. Jeff Lange is flying a 2S that he acquired that I think is also pretty stock. Never heard nothing but great reports on handling for pitch and roll. ?? ? ? I am going out on the proverbial limb here but I think that the W&B raises it ugliness closer to full gross. This is hearsay but I understand that Larry is less comfortable with his at full gross, Mark has told me a story about being light in the nose. I have turned around on taxi once that I felt wrong at full gross and taken the passenger back to the ramp. I only make mention of these to say that I don't know what would happen for sure adding additional length to the rear beyond the 2S. (waiting to hear Roberts answer to his over all length) ?? ? ? ?I would be willing to bet that the plane built with an additional inch or 2 foreword and an extra bay to the rear could or would fly just fine. It certainly would look larger on the ramp. It will weigh more. I am having a lot of trouble rationalizing the pain for the perceived gain. ? Well so much for being politically correct. So if I hurt anyone just ask yourself if he should be drinking with that pain medication. Joe Horton, Coopersburg, Pa
----- Original Message ----- From: "Gary Wold via KRnet" <krnet at list.krnet.org> To: "KRnet" <krnet at list.krnet.org> Cc: "Gary Wold" <pilotgary at charter.net> Sent: Friday, February 12, 2016 10:19:52 AM Subject: Re: KR> Preparing for KR2S build - again Thanks for all of the input to my question regarding KR2S modifications. ?I am, however, a little confused (doesn't take much) about adding length to the KR2S plans fuselage and could use help with some clarity. ? Joe Horton said: ? ?I am flying my first KR2S and it is longer than a KR2 and mine is 1 1/2" longer than the KR2S plans? ? Larry Flesner said: ? "Starting over I'd go with the standard KR2S length..., and the two inches forward of the spar" ? Robert Pesak said: ?"I added 3 inches forward of my main spar and 14 inches aft of the main spar, and it flies just fine with a 0200 continental." ? Wayne DeLisle said: ?" the KR2S already has an extra 2" added in the cowl area. No need to add more." ? Mark Jones said: ?".... is exactly the way my KR2S is built. Two inches forward of spar." ? >From Mark Langford's KR2S fuselage website: ??What would I do differently >given the opportunity? I'd probably use all of the 14 feet of longeron >material that Wicks Aircraft sent me, by adding 2.75" to each of the seven >bays AFT of the aft spars, yielding a plane 19.25" longer. Another option is >to add another bay back there, with the same dimensions as the others.? ? ? I realize this is not an exact science but from the 'average' of this experienced input, it sounds like the better way to go would be to add another 2? forward of the main spar and leave the aft portion per the KR2S plans. ?This, with using a Corvair engine, tricycle gear, and the ?stock? horiz stab length (with new airfoil) would work out okay. ?Am I missing something? ? Thanks ? ? ? ? Gary Wold EAA Lifetime member Eagle Scout ? "When once you have tasted flight, you will forever walk the earth with your eyes turned skywards, for there you have been, and there you will always long to return." ? - Leonardo da Vinci ? ? _______________________________________________ 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
