ORIGINAL: daven
the low rate so that the barrel closes just enough to keep you under the limit, then when you are in the air you flip to high rates where the barrel opens wide.
LOL! Like the F1 rule that the cars had to be at (or above) a specific ground clearance when leaving the pit area.
The verbage "when leaving the pit area" was to indicate that the spec was to be met with new tires and a full fuel load.
This was interpereted by the crews to mean "when leaving the pit area".
They found that by installing a hydraulic system not unlike that on a low rider, they could drop the car to minimal clearance AFTER leaving the pit area. The improved aerodynamics more than made up for the added weight of the lift system.