RAF Regiment in training film 1969

[old rockape]

The 40-70 had a barrel of 40mm cal x 70 calibres long as opposed to the older 40-60. It also had a longer higher capacity shell case resulting in much higher velocities. I think the Army used the radar controlled model. To my knowledge the RAF Regiment never used the radar version. The mount was electro hydraulic and the power was balanced by a big box full of valves and things (?). (I was a gunner not a technician) The guns had a nasty habit of going haywire. Basically like a demented carousal on steroids. Fortunately the no 4 had a big red stop button just in case.
Every gun flight had its own Meadows generator, a large trawler engine on a trailer. This was capable of supplying a large village or hospital with power. The gun had a rate of fire of 4 rpm and we normally fired bursts of 4, single shot could also be selected. The range appears to be Manorbier ranges near Tenby. My job as the No 3 was to lay and fire the gun. My head was next to the breech no one use hearing protection and yes I'm deaf.