Full of fuel and me in my KR2 puts the C of G 2.29mm (0.09in) in front of the forward C of G range, this is not a problem at I normally fly with a water pack weighing 2kg in the luggage compartment. The other option is to leave 3.5 Litres of fuel out (about 15 minutes of fuel). All this said I have flown with the C of G as far forward as possible and cannot tell the difference. I have placarder my KR2 with a minimum cockpit weight of 80kg.
I would not fill the tank and test fly to see the problems (if there are any). Once happy, fill the tank a little more and test fly again, remeber as the fuel burns off if comes back into the C of G range. A forward C of G is normally only a problem on landing, you cannot round out and end up flying onto the strip a bit hard (so I found out in a glider). regards Barry Kruyssen Cairns, Australia RAA 19-3873 k...@bigpond.com http://www.users.bigpond.com/kr2/kr2.htm ----- Original Message ----- From: larry flesner To: KRnet Sent: Thursday, June 16, 2005 4:00 AM Subject: KR> Re: Weight and Balance > I just finished up checking the W/B on 357CJ . It did not work >out to bad. My question is that in the most forward loading situation the >calculations show the loading between 1/4" and 3/8" forward of the >forward C/G range. > Is this realistically enough to worry about or should I >move things to get it right on?? >Joe Horton, +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ If that's your worst case with lightweight pilot, full fuel, full oil, etc., then I doubt if it's really going to be a problem. The greatest percent of your flight time will be with less than full fuel. If you had build a real airplane [ with a tailwheel :-) ] you wouldn't be having this problem !! Run the numbers with maybe 2 or 3 pounds of lead at the very rear of the fuselage and see what the numbers do. It won't take much at that moment arm. I installed a 2 pound lighter tailwheel and I seem to recall it moved my CG forward approx 1/2". Your 2S is somewhere between a standard KR and my 24" stretch so it should be close. If you do place some lead back there, secure it well. You don't need a projectile in case of a sudden stop !!! Your first flights will be with maybe half fuel so I'd test fly it for now and see how it handles. Forward CG is better than aft, within reason. As long as your inspector buys the numbers, I'd say you're in good shape to get started and tweak it as you go. Larry Flesner _______________________________________ 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
