BastOn as usual is quite right that when we went through training, the 3 had a straight boom & the 7 drooped plus different hydraulics & engines. Maybe when they converted that Whirlwind, they did the droop mod too.
In OZ I'm aware the 76 on two occasions managed to strike the fin with the blades. Just shows you how much they can stretch as if you just pull it down, the blade won't reach the fin!
