In the seventies there used to be what were called 'Border Closures'. This was when the Royal Engineers placed a steel tank across a road which was a, 'Non Approved Crossing' between Northern Ireland and Eire.
The tank was about 8''x2'' and for most roads this required two of them. The trick was to place two of these across the road, suitably protected by loads of sqaddies at every angle and them your trusty Pumas would come and pour concrete into the tanks.
A secure site some five or so minutes away would be the secure Redimix lorry site and the skips. each holding about a cubic yard of concrete, would be filled and hooked on the a six foot strop. Then we would fly to the border road, be talked on to the tank straddling the road and some lunatic would stand on the tank and pull the skip lever that would release a ton of concrete into the tank. The tank was on the border, we were invariably positioned so we were facing south or east so the skip was on the border and the cockpit was in Eire.
We could do a turnaround in about five minutes so 12 tons/hour was the filling rate which covered a normal closure.
Last edited by Fareastdriver; 5th Aug 2019 at 07:25.
Reason: Keep SASless happy.