TSR2 Chute
The TSR2 had a reefed chute. Efficiency of the chute as a slowing device is obviously related to V squared. If you pop a big one out at high landing speeds, it would need to be of v strong stuff. So TSR2 designers had a big chute which was "reefed" on initial op and at some lower-than touchdown-speed, was unreefed and allowed to develop its full area. (Not sure how the auto-reefing bit worked)