the early history of RAF helicopters, probably up to about 1980 or so
...well b
gger me gently with the ragman's trumpet
O-D, you've just made me feel old.
"Early history" and "up to ... 1980" indeed. I started (just) in the 1960s - first solo in a Sioux on 5th November '69 - and I thought I was one of the newer fellers.
Still, at least I never had the privilege (sic) of flying the Whirlwind on the front line ...
