I apologize if you have already addressed this, but how have you defined the aerodynamic loads?
BJC
Sorry do you mean loads for the fuselage, wing, or both? We've been mostly designing things using a conceptual approach and basing things off similar aircraft so far and we're still in the process of mastering all the calculations that go into verifying the safety of the design. We were worried if we started to get too deep into the nitty gritty calculations first, we'd end up calculating a lot of designs that we wouldn't end up using and it would be more efficient to take a TLAR approach and then refine it after we have a full draft. To make it clear, we won't even order parts until we've had at least a couple engineers look it over and we feel comfortable with the validity of all our equations. With that said, here's what we have done so far. I'm also just a CAD junkie and I'm not super involved with the work of our Physics team so I might have left something out. I'll have them chip in here though.
1) We calculated maximum upwards wing loading based on a 45 degree maximum bank angle
3) Drag/shear forces on the wing were calculated using CFD
4) Lift distribution along the wing determined using the Schrenk Approximation and then verified with CFD
Once we have our truss layout finalized, we'll calculate landing loads and verify the column buckling strength of all our beams. We also haven't taken into account any aerodynamic loading on the fuselage itself which I would imagine is quite important. If there's any resources for aerodynamic loading you suggest we study, it would be greatly appreciated if you could point us in the right direction. Also, though we have some numbers in terms of what the expected maximum aerodynamic loading will be on the wing, we are struggling when it comes to finding standard safety factors. Part 25 has some great information on this but I'm not sure how much of it can be applied to ultralight design as transport aircraft are a whole different category all together. Is there somewhere where we can find loading and safety factor standards? Thanks again for all the help.