The cause of this is the aft shift of the wing aerodynamic centre due to the large bending deformation coupled with the sweptback wing
configuration; because of the sweep angle, the outboard wing sections undergo a significant aft motion and their moment arms with respect to the CG increase, leading thus to an increase in [C.sub.M,[alpha]].
The more sweptback wing
was not quite as good for turning-and-burning in combat, so the leading-edge root extensions were redesigned.
1/ successfully completed our compressor stall investigation, 2/ tested new CD nozzle engines making us the fastest aircraft in the world, 3/ flown to 75,000', making us the highest flying aircraft, 4/ contributed to the knowledge of pitch-up in aircraft designed with sweptback wings
and T-tails, helpful for later fighter as well as similarly designed civil aircraft.
Grainy footage of Sir Freddie Laker, with a fine pair of sweptback wings
, appeared on TV at the weekend.
In that same year the SS range was upgraded, with more powerful engines, longer chassis and sweptback wings