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Multiple Choice

Air taxi is how far above the surface and how many knots?

Air taxi is about moving a rotorcraft at a low altitude with enough forward speed to stay stable and maintain lift, for quick point-to-point hops. The 100-foot height gives you a safety margin above obstacles while keeping the flight short and efficient. The 20-knot minimum forward speed provides translational lift, which improves stability and control at low speed and reduces the power needed to hold a hover. Going higher would waste time and fuel for short hops, while being slower would reduce lift and control margin and being much faster isn’t necessary for a quick route and increases exposure. This combination—100 feet and about 20 knots—reflects the typical air-taxi operating envelope.

Air taxi is about moving a rotorcraft at a low altitude with enough forward speed to stay stable and maintain lift, for quick point-to-point hops. The 100-foot height gives you a safety margin above obstacles while keeping the flight short and efficient. The 20-knot minimum forward speed provides translational lift, which improves stability and control at low speed and reduces the power needed to hold a hover. Going higher would waste time and fuel for short hops, while being slower would reduce lift and control margin and being much faster isn’t necessary for a quick route and increases exposure. This combination—100 feet and about 20 knots—reflects the typical air-taxi operating envelope.