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Can You Answer These 7 Aerodynamics Questions?

How much do you know about aerodynamics?


  1. 1) Angle of attack is:
    Chad Harwedel

    You got it. According to the Airplane Flying Handbook, angle of attack is the acute angle between the chord line of the airfoil and the direction of the relative wind.

    According to the Airplane Flying Handbook, angle of attack is the acute angle between the chord line of the airfoil and the direction of the relative wind.

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  2. 2) What is the top of the airspeed indicator green arc in a Piper Cherokee?
    Jim Sher

    You got it. The maximum structural cruising speed (Vno) is the top of the green arc.

    The maximum structural cruising speed (Vno) is the top of the green arc.

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  3. 3) In a spin:
    Chistian Bortes

    You got it. Both wings are stalled in a spin. As the airplane rotates around the vertical axis, the rising wing is less stalled than the descending wing creating a rolling, yawing, and pitching motion.

    Both wings are stalled in a spin. As the airplane rotates around the vertical axis, the rising wing is less stalled than the descending wing creating a rolling, yawing, and pitching motion.

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  4. 4) Lowering flaps increases:
    David DeHetre

    You got it. Lowering flaps increases camber, lift and drag.

    Lowering flaps increases camber, lift and drag.

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  5. 5) Maneuvering speed (Va):
    ravas51

    You got it. Maneuvering speed increases as aircraft weight increases. This is because aircraft at higher weights need to fly at a higher angle of attack at a given airspeed to produce enough lift for level flight. Since the aircraft is at a higher AOA, it will more quickly reach the Critical AOA if a full, abrupt control movement is used.

    Maneuvering speed increases as aircraft weight increases. This is because aircraft at higher weights need to fly at a higher angle of attack at a given airspeed to produce enough lift for level flight. Since the aircraft is at a higher AOA, it will more quickly reach the Critical AOA if a full, abrupt control movement is used.

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  6. 6) Ground effect is caused by:
    DewFrame

    You got it. Ground effect is a reduction in induced drag, caused by a reduction in downwash and wingtip vortices when your aircraft is approximately 1 wingspan or less from the ground.

    Ground effect is a reduction in induced drag, caused by a reduction in downwash and wingtip vortices when your aircraft is approximately 1 wingspan or less from the ground.

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  7. 7) What climb rate will a single engine aircraft produce at its service ceiling? (max weight, clean config, max continuous power)
    Josh Beasley

    You got it. Service ceiling is the maximum density altitude where the best rate-of-climb airspeed will produce a 100 feet-per-minute climb at maximum weight while in a clean configuration with maximum continuous power.

    Service ceiling is the maximum density altitude where the best rate-of-climb airspeed will produce a 100 feet-per-minute climb at maximum weight while in a clean configuration with maximum continuous power.

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Not bad, but keep working at it...

You scored % Well, that was tough. But keep working at it, and you'll have your aerodynamics knowledge perfected in no time.

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Nice work.

You scored % You have most of these questions down. Nice work.

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Looks like you know quite a bit about aerodynamics.

You scored % Well done.

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Colin Cutler

Colin is a Boldmethod co-founder, pilot and graphic artist. He's been a flight instructor at the University of North Dakota, an airline pilot on the CRJ-200, and has directed development of numerous commercial and military training systems. You can reach him at colin@boldmethod.com.

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