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NAME_________________________________ CLASS____________________
DATE____________
Trimmed Aircraft Worksheet
- An airplane in trimmed flight has a wing lift (W) of 30,000
Newtons. It has a wing distance (dw) of 2 meters and a
tail distance (dt) of 10 meters, both located aft
(behind) cg . (Assume direction aft of cg is
positive.)
- What is the magnitude of the the tail lift (T)?
___________________________
- Is the tail lift positive or negative?
___________________________
- What is the total lift of this trimmed aircraft?
___________________________
- You must design an airplane with a wing that has a lift (W) of
40,000 Newtons, a tail lift (T) of - 8,000 Newtons, and a wing
distance (dw) of 3 meters aft of cg.
- What is the total lift?
___________________________
- Aft of cg, what must the distance of the tail
(dt ) be?
___________________________
- Your customer now wants a wing distance (dw ) of
2 meters aft of cg. Aft of cg , what must
the tail distance (dt ) be?
___________________________
- Your customer wants the tail in this design placed forward of
the center of gravity (a canard configuration).
- Is the canard lift in this design positive or
negative?
___________________________
- Forward of cg , what must the distance of the
tail (dt ) be?
___________________________
- Is the canard distance (dt) from the
cg positive or negative?
___________________________
- What is the total lift for this canard configuration?
___________________________
- How does the total lift differ from the conventional
design?
___________________________
- What type of tail design did the Wright Brothers' Airplane
have?
___________________________
- A cargo plane trimmed for normal flight has a total lift of
120,000 Newtons. This aircraft's Wing lift (W) is 150,000 Newtons,
and it has a wing distance (dw) of 5 meters behind
cg. What is the tail distance (dt) behind
cg?
- The airplane in the previous problem had some of it's cargo
shift aft. This caused it's cg to shift 2 meters aft.
- What is dw now?
___________________________
- What is dt now?
___________________________
- With no adjustment by the pilot, what will the airplane do?
___________________________
- If wing lift (W) remains constant, to what must the pilot
adjust tail lift (T) to maintain trimmed flight?
___________________________
Please send any comments to:
Curator:
Tom.Benson@grc.nasa.gov
Responsible Official:
Kathy.Zona@grc.nasa.gov