At the same ground speed and otherwise comparable conditions, which longitudinal wind increases relative air speed and tends to raise fuel consumption through aerodynamic drag?

Question

sacatelcarnet · Accepted Answer

A headwind.. A headwind. Increased relative speed between vehicle and air tends to raise aerodynamic drag and the energy needed to maintain the same ground speed. This does not mean crosswinds can never raise drag or consumption, or that every wind guarantees a fuel-consumption change in every situation.

sacatelcarnet · Answer

A tailwind, as the cause of increased relative air speed in that case.

sacatelcarnet · Answer

Neither: air never resists the vehicle.

At the same ground speed and otherwise comparable conditions, which longitudinal wind increases relative air speed and tends to raise fuel consumption through aerodynamic drag?

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