Ask the Captain: What are those strange sounds on a plane? (USA News)

Inquiry: What is that last pound on the takeoff move that the plane's undercarriage makes about as the plane goes airborne?

- submitted by viewer Larry D Owens, Atlanta

Reply: You are most likely alluding to the principle arriving rigging struts enlarging to their full travel. It is regular to hear a "bang" created by this.

Q: Captain Cox, on CRJ air ship roughly 30-60 seconds preceding touchdown, I regularly hear three short beeps from the heading of the cockpit. Do you know what those beeps demonstrate? These are not the same as the seatbelt or other lodge team indicators. Much appreciated!

- Dan Parker - Madison, Wis.

An: It is conceivable that the clamor you are listening to is the autopilot being separated. Current planes have an aural cautioning when the autopilot detaches or is physically disengaged. This tells the pilot that he or she is currently mindful to physically fly the plane.

Throughout the methodology to arriving, it is standard for the pilots to separate the autopilot. When they do, travelers can hear the disengage cautioning and around a moment from touchdown might not be an exceptional time.

Q: Occasionally, generally throughout taxi, I hear a mechanical sound as though something is turning or pivoting, comparative to the pneumatic torques you hear in auto repair shops. What is this clamor?

- Blake, Louisiana

An: I think you are alluding to the Airbus A320 family when the Power Transfer Unit (PTU) actuates throughout taxi in. The PTU has been depicted as a "canine yelping," "a NASCAR tire haul firearm" or "sawing."

The clamor is the ordinary sound the PTU makes when it powers one of the pressure driven frameworks. Throughout taxi in, one motor is frequently closed down making the PTU power the inverse pressure driven framework.

Q: What is the irregular squeaking clamor that now and again planes make while navigating? I once heard its created when the maneuvering happens under the push of one and only motor for fuel safeguarding. Is it accurate to say that that is correct?

- submitted by viewer Ignacio, New York City

A: You represent a troublesome inquiry in light of the fact that "squeaking commotions" can hail from some sources. There are times when the inside boards squeak when there is a knock in a taxiway, a nose gear strut can squeak periodically, or there could be different causes.

Navigating on one motor does not make a plane squeak. Obviously, you may be utilizing "squeak" to depict the same sound as the past examiner, in which case, see above.