Unfortunately, because of the nature of air circulation, any downward-pointing force created aerodynamically generates a backward-pointing resistance in the process just as an increase in the lift of an aircraft wing as the flaps are lowered for take-off or landing creates more drag in the process, forcing the pilot to open the engine throttles to overcome the extra wind resistance.

ECONOMIST: CAR DESIGN

The engine constantly throttles up and down, not only to counter the drag on the satellite from residual air molecules in near space but also to smooth the flight of the vehicle to minimise the noise in the gravity measurements.

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Upon reaching 41, 000 I pulled the Mustang's throttles back to 220 pounds per hour per engine of Jet A fuel.

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Once at 41, 000, I pulled the throttles back to 220 pounds per hour of Jet A fuel per engine.

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