Originally Posted by
clubagreenie
Oh, Oh, sir, sir, can i answer?
The crush can pins are aluminum with a small steel centre pin, designed to shear at <500kg (by my previous testing). Several thousand kilograms of force will be applied through the strap, because of it's elastic nature. The vehicle, most likely being submerged to a degree and the rear recovery point of the vehicle in front will force the strap upwards. In addition to the natural whip of the strap as it goes from slack to full elastic deformation in a matter of a second or two, which will be exacerbated by the additional mass of the connecting shackle. The bridle will whip upwards and the outer skin, which is attached to the deformable structure (steel backing) by adhesive tape, will deform and if not immediately detached will at least be weakened if not cracked.