The Lift Dump is deployed when the aircraft touches down. The flaps go to about 75 degrees and the top and bottom spoilers go from about 50 degrees to about 80 degrees. This aids in aerodynamic braking.
Lift dump has to be stowed prior to flap retraction.
A dry landing at a a high weight will require about 4,000 of runway. The aircraft can actually be stopped in 60% of this value. If the flight was conducted under FAR135 then an additional 15% of runway would be needed on a wet surface. The Hawker does have non-FAA approved data for wet and contaminated runway conditions in the Flight Manual Suppliments.
Last edited by fly-efi; 08-08-2008 at 10:00 AM.