A method of part hanging by permanent magnet is briefly introduced , which has successfully solved the electrostatic powder coating spraying on small parts with no any holes.

To analyze the handling quality of a helicopter with the heavy slung-load, this paper presents a theoretical analysis model.

A six-freedom slung-load model with multi-segments soft tightwir mathematical model is applied, and the sling box is modeled as a cylinder with simple aerodynamics shape, a recoil force model from the experiment is also appended to the slung load.