Hi Mark, What is the design spec range for the CG..should be xx to yy from some datum. Were you in this range on first flight? Good luck..I know SId had some CG issues r/Bernie ________________________________ From: KRnet <[email protected]> on behalf of mark jones via KRnet <[email protected]> Sent: Wednesday, May 20, 2026 1:02 PM To: KRnet <[email protected]> Cc: mark jones <[email protected]> Subject: KRnet> Weight and Balance
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]<mailto:[email protected]> www.flykr2s.com <http://www.flykr2s.com>
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