I just took a look at Rand Robinson "Drawing A" of the fuselage and checked the dimension changes I made and marked on that drawing. I mistakenly said that I added one inch to each bay. In reality, I only added a total of two inches. The changes I made were to increase the distance from A to B to 8.25 inches and increased the distance from B to C to 9 inches. Like Langford just stated in his post, it is not a simple matter. I have a heavy plane. It is 771 lbs empty and my turtle deck is heavy. I don't know how heavy it is but just by looking at it, you can tell it is heavy. I have a lead counterbalance weight in the tail for the elevator. I have a larger horizontal and vertical than stock. I also am a heavy pilot which all together gives me the ballast I need for the added two inches in front of the mail spar. There is only 3/8 of an inch between my starter nose and the firewall so my engine is as close to the firewall as possible. When I did my weight and balance in November 2004 for the FAA inspection, I weighed 246 lbs and that put my CG 2.2 inches aft of the forward limit with 20 gallons of fuel in the wings and the CG moves forward one inch with tanks empty. Now, take Langford's weight of 140 lbs and put him in my plane and the CG is 1/2 inch aft of the forward limit with 20 gallons of fuel in the wing tanks and with the tanks empty it would be 7/10th of an inch forward of the forward CG limit. Therefore, if Langford were the owner/pilot of N886MJ, he would need aft ballast to move the CG back for safe flight. Yep, I got lucky.
Mark Jones (N886MJ) Wales, WI Visit my web site: www.flykr2s.com E-mail: flyk...@wi.rr.com ----- Original Message ----- From: "Ron Smith" <mercedesm...@yahoo.com> To: "KRnet" <kr...@mylist.net> Sent: Wednesday, December 13, 2006 6:23 PM Subject: RE: KR> Extending the Firewall or engine mount to adjust balance > > > Mark Jones <mjo...@muellersales.com> wrote: Hello Brad and welcome, > I have a KR-2S and extended my forward area by adding one inch to each > bay forward of the main spar. > > Hello Mark, > > So that is a total of 3 extra inches forward of the main spar? Did you use > the WW mount? The reason I ask, is that I plan to use the Corvair also > (with Williams mount), and have two extra bays (24") in the tail section. > I'm thinking I may have to lengthen the Motor mount. > > > > > > Ron Smith > Kr2ssxl > Cypress Ca U.S.A. > mercedesm...@yahoo.com > http://ronsmith.myphotoalbum.com/albums.php > > --------------------------------- > Everyone is raving about the all-new Yahoo! Mail beta. > _______________________________________ > 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
