C130 dropping trials circa 1967/68
I was fortunate (?) enough to be the flight engineer on the dropping trials held at Boscombe Down to convince their Lordships at MOD that the Beverley system would work on the Herc.
Early trials were carried out on MSPs with perspex sheets placed along the cargo deck sides and the load was festooned with chinagraph pencils which in theory would give a trace of the attitude of the load as it left the aircraft.
I don't still know what it proved but it frightened us f**tless especially when the loads tended to hang up on the lower cargo door prior to exit. I can still see in my mind's eye a certain wee Scottish captain called S***son standing up and pushing the pole forwards as hard as he could when this happened.
Happy days!