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ymb1
ymb1
3:56 AM
Interesting that the 330 was artificially limited and accounts for much of the increase. Deflection (and weight) of a cantilever beam varies with the cube of its length, not the simple length. What does that do to the rest of the calculation? — Pilothead 3 hours ago
I'm not sure I follow, are you talking about the weight of the wings?
if I understand you correctly, it won't change the calculations, taking the A340 with its higher torque up/down as a baseline is for that simple model sufficient to note the gap in the same area on the A330 (two areas: torque from lift → how much potential is left, and torque from engines → how much the 330 doesn't inherently have)
this is assuming for the simple model that both wings are identical, in reality they are near identical
I can move the loads to the end of the cantilever beam (keeping the same net torque) and compare the PL^3 deflections -- this is what you have in mind?
 
 
1 hour later…
ymb1
ymb1
5:37 AM
ok, I've done the above, the original result was 16.32651685 -- the PL^3 result 16.32651685 tonnes deficit, so no difference
applying the same net torque at the cantilever beam's end and seeing the deflection is the same as checking the difference in net torques at the different load stations
 

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