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 รท 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 lbsRight Main 325 lbsNose wheel 259 lbsDatum measuring point: Front side prop Crush plateDatum to nose wheel: 21.5"Datum to Mains: 67.5Datum to leading edge stub wing: 46.5Datum to Pilot: 65" with pilot weight 178l lbsThanks for any help.
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