Hi Jerry, Pilot is 178 lbs.
Thanks Mark Jones KR2S (N771MJ) Cessna 140 (N1856C) Tampa, FL [email protected] www.flykr2s.com On Wed, May 20, 2026 at 2:05 PM Jerry Pryce via KRnet <[email protected]> wrote: > I come up with a CG of 56.07" using your datum and stations for pilot, and > landing gear. > > Pilot 278# sta 65 mom 11570 > NG 259# sta 21.5" mom 5568.5 > LG 319# sta 67 mom 21532.5 > RG 325# sta 67 mom 21937.5 > --------- ------------- > 1081# 60608.5 > > 60608.5 ÷ 1081= 56.07" > > > Jerry Pryce > > On May 20, 2026 10:02, mark jones via KRnet <[email protected]> wrote: > > HELP......I am so confused. My new KR WunderBird is ready to fly except > for the weight and balance. I have made many runs down the runway and on > one run I lifted the nose and she shot straight up to about 100' and I > could not push the nose down and she stalled on me. I was fortunate enough > to cut power and get her flat before she contacted the ground very hard. > Bent the main landing gear brackets and had to make more. I did some w&b > adjustments, repaired the gear and tried again. Still tail heavy. I am very > lucky I did not destroy the plane on that first flight attempt. So, here is > my challenge to anyone who wishes to figure a weight and balance on this > bird. I just want to compare others with my calculations. Here are the > parameters. > > Weighed with FULL FUEL: 12 gallons each wing. > Left Main 319 lbs > Right Main 325 lbs > Nose wheel 259 lbs > Datum measuring point: Front side prop Crush plate > Datum to nose wheel: 21.5" > Datum to Mains: 67.5 > Datum to leading edge stub wing: 46.5 > Datum to Pilot: 65" with pilot weight 178l lbs > > Thanks for any help. > > Mark Jones > KR2S (N771MJ) > Cessna 140 (N1856C) > Tampa, FL > > [email protected] > www.flykr2s.com > > > > > -- > KRnet mailing list > [email protected] > https://list.krnet.org/mailman/listinfo/krnet >
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