Originally Posted by
parabellum
One of the cheapest instruments to maintain on the Bell47G-3B1 was the Slip Indicator, you need a ball of wool, a pair of scissors and some Cello tape!
A really lovely aeroplane to fly and a good basic trainer too. Would have thought some of the ex British Army ones were still about? A call to Westland Helicopters, near Yeovil, may provide you with some information as they built the Bell under licence.
Not just any old ball of wool ... genuine Merino, if you please !
Only one trip at TH in the 60s - definitely more cyclic 'arm exercise' than the Whirlwind, but the view ...!!! and the (demonstrated) eol, followed by a climb to 10' and a further, controlled landing.! Rotor inertia aplenty !
