Balloon kite flight
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Yesterday Dudu inflated both of the new balloon kites in the shop and left them overnight to insure that there were no leaks. Today we inflated one with helium and launched it outside.
Balloon KITE DATA:
Diameter of Burger: 2000m
Height to Diameter ratio: 0.6
Height of Burger: 1200mm
Volume of an ellipsoid: 4/3 * PI * a*b*c
(a,b,c are each radii, so a=b and c=height)
Volume of our Burger: 4/3 * PI * 1*1*0.6 = 2.5 cubic meters
1 cubic meter = 35 cubic feet
Volume of Burger: 88 cubic feet
We used the 110cubic feet tank of helium to fill and there was some left.
Our 3D gas kite improved the shape of the ballon by making the radial panels from a 3D lofting calculation.
LIFT
We did measure the pull of the kite during time intervals:
– right after flying the kite – friday end of day 760 grams
– Saturday night – 730g
– Monday morning – 760g (!!)
– Monday night – 710 g
– Tuesday morning – 690 g
– Wed. morning – 675g
– Thu. morning – 645g
– 5+ days – Tuesday morning – 535g
this balloon looses about 20g of lift per day
We lifted a GO PRO camera with mount
GOPRO + mount = 302g
GOPRO = 170g
GOPRO with no case = 98g
More: Kite Tests on Land and Water