CFI Pop Quiz #322 - Stall

[Chris Burgess]

Which is true concerning retreating blade stall?

A) Aircraft will pitch up and roll to the right at the onset of the stall.
B) Nose of the aircraft will pitch down and may roll in either direction at the onset of the stall.
C) When operating at high forward airspeeds, turbulent air or steep and abrupt turns can cause a retreating blade stall.

[Aussie_Paul]

Which is true concerning retreating blade stall?

A) Aircraft will pitch up and roll to the right at the onset of the stall.
B) Nose of the aircraft will pitch down and may roll in either direction at the onset of the stall.
C) When operating at high forward airspeeds, turbulent air or steep and abrupt turns can cause a retreating blade stall.


C) for me on this one. First cab off the rank this time!!!!

Aussie Paul.:)

[Friendly]

I would say C

[EI-GYRO]

I agree with the cabbie. (C)

[B8MFlorida]

C............................

[Paul_Zurawski]

(Charlie) (C)

[skypuppy]

If we are talking about helicopters, retreating blade stall will produce a low frequency vibration, pitching up of the nose, and a roll in the direction of the retreating blade. Retreating blade stall is also encountered at lower forward airspeeds as altitude increases. For gyroplanes, the stalled portion of the rotor disc is inboard rather than near the tip, you may not not experience a large pitch or roll.

[mark treidel]

Going with 'C' as most correct. Gyros dont stall - but the retreating blade sure will when disrupted at high speeds.

[birdy]

If you havent backed off when the stick starts kickn, your a tempory earthling.

[Chris Burgess]

"C" is the most correct answer. Which is true concerning retreating blade stall? (C) When operating at high forward airspeeds, turbulent air or steep and abrupt turns can cause a retreating blade stall. Reference FAA-H-8083-21

I felt onset of retreating blade stall while flying a Huey in Vietnam. It was a hot, humid day and we were loaded with combat equipped troops. I was trying to get to the drop zone ASAP, pushing somewhere around 120 knots plus. The aircraft "talks" to you. It vibrates and tries to pitch up. If you are stubborn enough to keep pushing forward and pulling collective, it would progress into full blown retreating blade stall. Slow down. That's what the aircraft is "telling" you. Pay attention.

[bartc150]

A is incorrect because not all rotorcrafts rotors spin in the same direction.