777, 767,757,747, etc. Elevators and VR
Dec 14, 2010 | 8:11 pm
#1
Original Poster
Join Date: Jul 2002
Location: Seattle
Programs: Alaska Airlines
Posts: 1,570
777, 767,757,747, etc. Elevators and VR
So, I've watched many YouTube videos of the aforementioned favorite planes...and I rarely see the elevators deflect upwards to assist with the rotation/lift of the plane.
I mean, I know that as the plane is accelerating down the runway that pressure under the wing is doubling as the speed increases which will undoubtedly cause the plane to lift.
However, the pilot always has to pull back on the yoke which then controls the elevators, so why do I not notice any movement of the elevators?
I mean, I know that as the plane is accelerating down the runway that pressure under the wing is doubling as the speed increases which will undoubtedly cause the plane to lift.
However, the pilot always has to pull back on the yoke which then controls the elevators, so why do I not notice any movement of the elevators?
Dec 14, 2010 | 8:15 pm
#2
Join Date: Jan 2006
Location: ZRH
Programs: DL DM, LX SEN, AA Plat Pro, TSA Disparager Gold
Posts: 1,432
My understanding is it is a very small deflection which is not visible to the naked eye at such a distance.
Once the plane begins to rotate, the angle of attack on the wing increases resulting in additional lift produced. Depending on the stability characteristics of the plane, it can hold an attitude with the control surface in a neutral position. The airplane can be trimmed to maintain a particular attitude and airspeed.
Once the plane begins to rotate, the angle of attack on the wing increases resulting in additional lift produced. Depending on the stability characteristics of the plane, it can hold an attitude with the control surface in a neutral position. The airplane can be trimmed to maintain a particular attitude and airspeed.
Dec 14, 2010 | 8:34 pm
#4
Join Date: Aug 2008
Location: Wilmington, NC
Posts: 504
So, I've watched many YouTube videos of the aforementioned favorite planes...and I rarely see the elevators deflect upwards to assist with the rotation/lift of the plane.
I mean, I know that as the plane is accelerating down the runway that pressure under the wing is doubling as the speed increases which will undoubtedly cause the plane to lift.
However, the pilot always has to pull back on the yoke which then controls the elevators, so why do I not notice any movement of the elevators?
I mean, I know that as the plane is accelerating down the runway that pressure under the wing is doubling as the speed increases which will undoubtedly cause the plane to lift.
However, the pilot always has to pull back on the yoke which then controls the elevators, so why do I not notice any movement of the elevators?
**The horizontal stabilizer is the large surface on the tail of the plane. The elevators are on the trailing edge of the stabilizers. The control yoke moves the elevators and the stabilizer trim moves the entire horizontal stabilizer.**
I hope this helps. I added the ** parts just in case someone wasn't clear how the system works
