Russ, I will take a stab at this for you. Yes, I did move my firewall forward by adding two inches. I added one inch to each bay closest to the main spar. I also wound up with a firewall which is two inches wider than stock. I also added 1 3/4" to the height of my turtle deck so my headset would clear the canopy by a 1/2" or so. My fuselage is 39 3/4" at the shoulders and a little wider up at the main spar. That was my bad as I did not intend for that to happen. You want the widest at the rear spar. >From the main spar to the tail my plane is stock. If I were building another, I would not hesitate to add a couple more feet to the length. I would also stick with the new tail feathers design which Langford supplied us. As my plane is set up, the CG came out, with full fuel and me in the plane, 2.1 inches aft of the forward most CG limit. From full fuel to empty, the CG moves forward 9/10ths of an inch. If I add a 200lb passenger, at full fuel, the CG moves back another 2.4 inches and moves forward 1/2" when empty fuel. All this keeps me in the safe CG range. Now, if I had the extra two feet on the rear of the fuselage, I am sure these numbers would change which would result in possibly weight adjustments to get the safe CG range.
Mark Jones (N886MJ) Wales, WI My Web site: http://www.flykr2s.com/ Mailto:flyk...@wi.rr.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Russ Kendall Sent: Monday, February 12, 2007 12:02 AM To: KRnet Subject: KR> Balance-lenthening fuselage Hi everyone, I've been reading everything I can find in the archive in regards to moving the firewall forward to give me more leg room, (I'm 6'3"). From what I gather, moving the firewall forward is risky. I'll be going with Diehl trigear, corvair, wing tanks, my weight is 200 lbs. frequently fly with passenger. I read where Mark Jones moved his firewall forward 2". I'm considering extending the rear of the fuselage back another 14" more than what the KS plans call for, as Mark L. suggests. How do you think this would affect a KR2S in trigear configuration? Or, should I just go with the enlarged horizontal stab., which I'm thinking would weigh more? I realize every plane is different, but I'd really appreciate your thoughts. Thanks Russ Kendall _______________________________________ 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
