With the following information I am >trying to calculate if I infact have an increased Gross Weight >considering the increased wing span and increased HP? >Keith and Brent Wiese +++++++++++++++++++++++++++++++++++++++++++++++++++++++
I haven't seen a reply to your question so I'll throw out some general observations. I'm sure someone will correct me if I'm wrong. First, if the aircraft has never been inspected and certified, you can assign any gross weight you want as you are considered the builder. Please understand though that the heavier you fly your KR the G rating of the structure decreases. At 1100 pounds you are in the 5 G area. (Design G ratiing is plus/minus 7 G's at 800 pounds = 5600 divided by 1100 = 5 G's) Take off another 1/2 G if you have the longer wings generally refered to as the Diehl skins. I think they extend the wings another 14 to 18 inches. I fly my KR much of the time between 1050 and 1125 pounds BUT I have a 100 horse engine, a 24 inch fuselage stretch, plans built wing, and ALL fuel in the outboard wings which helps to unload the wing attach fittings. I have flown on 4 or 5 occasions at probably 1250 pounds with no problems. To date, I have probably not stressed my KR beyond maybe 3 G's at 1100 pounds so take it for what it's worth. Second, flying at your desired 1115 pounds with a 75 horse engine will give you less than spectacular performance. If you're running a header tank your CG will move aft with fuel burn. It is generally accepted among KR "fliers" that you will want to stay out of the last two inches of the CG envelope on a plans build KR for stability reasons. Your bird ,with you as a 170 pound pilot, should be a fun airplane. If you're able to fit your 212 pound friend in with you and stay in the proper CG range, you will probably have a dog on your hands, performance wise. Other KR fliers jump in here if necessary......... Larry Flesner
