Service ceiling
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Join Date: Mar 2003
Location: uk
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Service ceiling
Hello, I am curently studying aerospace engineering at college, I have 2 questions that i hope someone could help me with;
Q1) With a decrease in outside air temperature, the service ceiling of an aircraft will be :-
a) Reduced
b) Unaffected
c) Increased
Q2) Operation of the ‘stick shaker’ motor during landing :-
a) Reminds the pilot to lower the undercarriage
b) Indicates landing flap is selected
c) Means that the aircraft is near to stalling
Any comment on these questions would be appreciated, thankyou
Q1) With a decrease in outside air temperature, the service ceiling of an aircraft will be :-
a) Reduced
b) Unaffected
c) Increased
Q2) Operation of the ‘stick shaker’ motor during landing :-
a) Reminds the pilot to lower the undercarriage
b) Indicates landing flap is selected
c) Means that the aircraft is near to stalling
Any comment on these questions would be appreciated, thankyou
(1) Increased. For a given pressure altitude, a drop in temperature will increase air density and thus thrust. So, thrust to maintain level flight will be available at a greater pressure altitude.
G
G
Join Date: Feb 2002
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Actually the first question is not too fair. The service ceiling is set by the manufacturer, and is the max alt to which the a/c is certified to fly at. It will usually be set at a lower altitude that the maximum altitude attainable by the a/c to allow for varying temperatures/density/humidity/etc. Soooo, in theory it shouldn't change.
However, I agree with Gengis in that a drop in temp will allow the a/c to operate at a higher altitude.
Badly worded IMHO.
However, I agree with Gengis in that a drop in temp will allow the a/c to operate at a higher altitude.
Badly worded IMHO.
