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Old 22nd Jun 2020, 06:57
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Dan Winterland
 
Join Date: Jun 2001
Location: Fragrant Harbour
Posts: 4,787
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And as for elevator movement, it really depends on the type. When the Bulldog entered RAF service, it used the Beagle Pup's recovery (Similar to the Chipmunk's) which was reasonable considering it the Bulldog was designed from the Pup. However, they were very different types. the Bulldog was heavier, had more span and that enormous canopy. And several were lost in spinning accidents quite soon after it entered service. It was only after one recovered after the canopy was jettisoned that it was realised that the huge canopy was blanking the rudder. From then, the recovery was changed to a very positive elevator input described as "move the control column firmly forward until the spin stops" which was almost akin to a bunt. This fixed the issue by forcing the rudder into the clear slipstream.

The danger of using the wrong techniques is highlighted by the accident report into a Slingsby Firefly being flown by two current Tucano students where it was postulated they failed to recover from a spin by the application of a technique which wasn't the one recommended in the Firefly POH.
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