ORIGINAL: Adil Nasim
The wings attachment is excellent. The above post that the wing attachment is not adquate is a joke. There are two 1/2 solid CF rods and one of them DOES go through and through. The rear one goes in a phenolic tube about 6" and resides in an AL clamp to retain the wing.
Accually it was not meant to be a joke. Wouldn't be the first plane with catastrophic wing failure.....
I've done the calculations, assuming that the carbon rods are extending halfway into the wing, are solid (error-free) high tension rods with 600MPa bending modulo of 1/2" diameter each, one going all the way through, the other extending 6" into the fuselage.
This setup gives me a burst load of about 140-150lbs, or slightly more than 63kg to be more specific. Estimating an optimistic 22lbs weight, this gives the airplane 6Gs max performance....less than the original had. Everything above 6Gs load will be due to wing mounting....but from an engineering standpoint, this system is bound to fail at a very very optimistic 10G's max, if it were a real airplane it would be limited to 3-4Gs...
These are the textbook numbers i came up with, as an oncoming mechanical engineer in aeronautics, not the opinion of some guy wanting to bash skymaster....it's simply a concern after seeing the setup and going through the numbers.
Best regards
Hank