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Good ALTITUDE questions/answers

A1FlyBoy

Well-known member
Joined
Jan 11, 2002
Posts
682
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Enough
Time to update some of the material...

Whose got some good / unique questions and answers for students on topics ranging from:

Density Altitude
Pressure Altitude
Performance
etc.....................




:eek:
 

jaybird

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Joined
Nov 25, 2001
Posts
523
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3.0+
I love asking those kinds of questions.

1) At the same BHP as you go up in altitude what happens to fuel flow?

2) As temp. increaces what happens to TAS?

3) (For commercial students) Where would you want your C.G. to be (within limits) on a cross country?

4) How can you figure out P.A. and D.A. without a flight computer?

5) (For people who only train at sea level airports) What will your manifold pressure guage read if takeing off in Denver as apposed to sea level?
 

Andy Neill

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Nov 26, 2001
Posts
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6200
Question: How could you calculate Density Altitude without using an E-6B (manual or electronic)?

Answer:

DA = FE + 1000 *(29.92 - QNH) + 120*(T-ST)

Where

DA = Density Altitude
FE = Field Elevation
QNH = Local altimeter setting
T = OAT in degrees centigrade
ST = standard tyemperature for the Pressure Altitude as derived from the first part of the equation (FE + 1000 *(29.92-QNH))

For instance, if
FE =2900 feet
QNH = 29.82
T = 26
PA = 2900 + 1000*(29.92-29.82) = 2900+100=3000
ST = 15-(3000/1000)*2=9
DA=PA + 120*(15-9)=3000+120*6=3720.

How close did I get?
 

jaybird

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Nov 25, 2001
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Thats the formula I except 110(T-ST) in the last part.
 

Hugh Jorgan

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Nov 25, 2001
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50
Okay jaybird,
You win the best avatar award! reminds me of the old joke with the punch line: "...Why do you ask, Two-Dogs-Humping?"
 

jaybird

Well-known member
Joined
Nov 25, 2001
Posts
523
Total Time
3.0+
I used the jpeg shrinker so now you can see the whole picture.
 
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