W00
We used to drop underslung vehicles from the Hastings. The Army Heavy Air Despatch unit at Abingdon possessed an endless supply of battered Austin Champs, which we used to deposit on Watchfield with varying degrees of success. That's when I discovered a Champ can be reduced to 12" high if the parachutes fail to open! It was also possible to drop (small) field guns and trailers, but I never saw it done.