Airplane tail loads are difficult to determine accurately by means of model tests and theoretical analysis. In order to obtain reliable tail load data, it should be determined by flight tests.

But it was a birdlike tail that really amped up the aerodynamics, dampening the drag from the body and wings, as well as boosting the lift that lags under vehicle weight and cargo load.

With material mechanics theory, expounded bolt tail subjected to no center load action and roof bolt broken mechanism while roadway was supported with bolts.