Joe, I appreciate your detailed response and comments regarding each of the modifications I listed. Mark indicated at the bottom of his website regarding fuselage build ( http://www.n56ml.com/kfuse.html ) that if he had it to do over he probably would use the full 14' longeron material with either another bay or adding a couple inches to each bay behind the rear spar. I too am concerned about the potential balance issue with a longer fuselage although I am planning to use a Corvair engine (assuming I can find one) so a little more weight than a VW.
Regarding the header tank, I certainly can relate to the desire for the 'security' of a header tank for fuel flow but I've also read various bits about weight and balance shift as the fuel level goes down. Am I just over thinking this stuff? Easier to adjust during the build than after. 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 -----Original Message----- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of n357cj via KRnet Sent: Wednesday, February 10, 2016 12:33 PM To: KRnet Cc: n357cj Subject: Re: KR> Preparing for KR2S build - again Hey Gary, This going to be advise from someone that can say I am doing it this way on their second build which I am in the middle of. In addition to the things mentioned below or to clarify. I will make my comments as per the list you have provided below. Number one and number two I have completed Number three - this term has been used in a number of different ways that has always bothered me as for its clarity. I am flying my first KR2S and it is longer than a KR2 and mine is 1 1/2" longer than the KR2S plans. It flys and weight and balance is great even with burning 12 gals out of a header tank. So are they telling you another bay longer than a KR2 or KR2S. There are weight and balance implications to getting the weight too far back also. I think that Larry F has an extra bay above the 2s but I also think he may have added forward of the main spar also???? I am one of the people that think the KR2S elevator and and horizontal stab are more than adequate and perform well on my plane, havin said that the new one has them wider for both and with the airfoil as opposed to the stock slab design. The angle of incidence and the relationship to the wing incidence is of far greater importance here. Number ?four.. increase the vertical height is yes good but I feel it would be more accurate to say how much should the area of the surfaces be increased. I think and will have to double check but but I think that i increased the vertical stab and rudder by 20% over the 2s design. I absolutely need more control for some of the crosswind landings and takeoff's I have gotten away with. Number five - use the larger airfoil- I am Number six and seven ... yes .. I am Number eight.. I find that i can not give up the safety factor of having a header tank that can gravity feed my engine. The argument of fuel in your lap is emotional at best, I do not remember any instance of accidents that the header fuel tank was a factor (i will likely get corrected here) I currently have built and plan to use wing tanks in the outer wings at 10 gal each and am building the header tank that will be the reserve (always) of about 7 to 8 gals. I do not have the fuel pump and line configuration completely figured out yet but am very close. ?? ?Suggestions.... Keep it light... light.... LIGHT! clean off the extra glue -clean up epoxy runs- make sure foam is sanded correctly because everything after the glass is just weight in the form of filler- resist adding additional layers of cloth except the deck cloth which goes a very long ways towards the ultimate finish. There does not need to be beefing up of areas it is already stronger than I have been able to break. I am not installing motors for belly board or trim opting to save that addition of weight for auto pilot servos (which I have installed currently and will not go without again either). I am on the fence about instruments at this point about how much glass is to much but there is certainly a weight savings to be had right in the panel of first guess is the upper side of 5 lbs. Your results will certainly be different, but hope it helps some. Joe Horton, N357CJ (860hrs) in the hanger and unidentified 2S in the shop ----- Original Message ----- From: "Gary Wold via KRnet" <krnet at list.krnet.org> To: krnet at list.krnet.org Cc: "Gary Wold" <pilotgary at charter.net> Sent: Wednesday, February 10, 2016 12:10:35 PM Subject: KR> Preparing for KR2S build - again I feel like I am almost starting over with the KR2S. ?With the end of my caregiving responsibilities, I now have some time to get into the build. ? ? Just started going back through the information on the KR website and the plans to reacquaint myself with the wealth of information. ?While I am doing this, I want to send for an updated quote for the spruce and plywood with the idea of getting it ordered by the end of the month. ?I could, however, use some help with the recommended/suggested modifications before ordering material. ?Following is what I am currently planning: - ? ? ? Add 4" to fuselage width - ? ? ? Move widest point to the shoulder area - ? ? ? Lengthen the fuselage adding an additional bay per Mark's suggestion - ? ? ? Use the stock horizontal stab (per comments at OSH2015 forum) - ? ? ? Increase the vertical stab height - 4" maybe - ? ? ? Use the newer airfoil - wing and stab - ? ? ? Front hinge canopy - ? ? ? Belly board - ? ? ? Wing tanks (only) ? Anything else you would suggest? ? Itching to get started. ? 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 _______________________________________________ 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
