On 4/5/2020 8:41 PM, Vern Taylor via KRnet wrote:
For an aircraft designed to withstand repeated g loads od 7 g's, the ultimate
load it should withstand is 14 g's.
With an increase of MTOW, as many KR's have been built, the design g rating
would have to be reduced to cater for this, but by how much would be the
question.
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Math and physics suggest to me that 7G's at 800 pounds would equal 5600
pounds. If I fly my KR at 1200 pounds it would seem I have a 4.6G
structure. (5600 / 1200 = 4.6). Don't worry about the weight of the
fuel in the wings on landing. If you hit hard enough for that to be an
issue you'll not be walking away from the crash anyway. I have 12.5
gallon in each wing. If you go with wing tanks go long and narrow and
keep the fuel as close to the main spar as possible to have the least
possible effect on C.G. with fuel burn. My tanks run the entire length
of the outer wing and 10 inches from spar back. Do the math for the
volume you want and size the tank accordingly.
Larry Flesne
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