> for the first time our authority has asked me to justify my MTOW > of 1200lbs (545kg).
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ I licensed my KR for 1300 pounds gross. At that weight the design is rated at 4.3 G's (7 G's X 800=5600 pounds / 1300 = 4.3G's). While the structure is designed to handle that weight it may not be aerodynamically capable of flying at that weight because of the CG location at that weight. Do a careful W&B to see what weight keeps you in the CG range. When Mark Langford and I flew to Oshkosh at very near that weight it was as far aft CG as I would care to fly and my KR is a 24 inch stretch. A standard KR is probably not capable of being loaded to that weight due to aft CG range. A KR with fuselage tanks of 16 or more gallon, be careful as CG will shift rearward noticeably with fuel burn. A normal flight for me (500+ hours to date) is in the 1050 to 1100 pound range. My KR has the RAF48 airfoil and is actually 8 inches shorter than planned wing span. Wings with the Diehl wings or wings longer than standard, the design G rating will be slightly less due to the longer span. The KR is one tough bird but it does have it's limits. Check the design CG rating of a Cessna or other spam cans. I think you'll find they are in the 3.5 range or close to that. Ask your authority why they let them fly at the weights they do. :-) Larry Flesner
