Quote... If the engine was not developing full thrust, this would have a significant impact.
Not too sure about that.... On the downward part of the loop gravity plays a very important role, and the aircraft will pick up speed at about 20kts per second. Also the higher the speed the more the radius of curvature increases. So applying power whilst descending could create a bigger radius. Even gliders can perform loops and they have no power at all.
For what its worth, the climb and descent each took about 10 seconds.
The following reference gives details of the take-off distance of the RR Avon 207 variant (10150lbs st.)at MAUW, of 1090metres.
The T7 version, with the RR Avon 122 only has 7750 lbs st. The 02/20 runway at Shoreham is just 1036 metres.
see...
http://www.hunterteam.com/hawker_hun...tech_specs.htm
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