7 votes
Accepted

Did SR-71s have a switch for seat height adjustment for the pilot or were there strict height requirements in order to fly it?

According to the POH the pilot could indeed move the seat up and down (source) Its worth noting that the SR-71 was a spy plane and visibility from the cockpit was not necessarily a critical aspect of ...
Dave's user avatar
  • 101k
2 votes

why lift coefficient decreases at supersonic flow?

As you probably know already, the 2D lift curve slope in supersonic flow is $$C_{L\alpha} = \frac{4\cdot\alpha}{\sqrt{Ma^2 - 1}}$$ when calculated by potential flow theory. But I guess you would like ...
Peter Kämpf's user avatar
2 votes

How to compute final aircraft attitude, if we know starting attitude and degrees of rotation around each axis? (Specific example)

First off: for your specific example, no calculus is required (but quite a bit of linear algebra), since you only rotate around one axis at a time. If you start doing complex maneuvers, combining ...
Sanchises's user avatar
  • 12.9k
1 vote

why lift coefficient decreases at supersonic flow?

Let's consider a flat plate and let it fly both at subsonic and at supersonic speeds. Let's start with the subsonic case and let's see how the airflow looks like around the flat plate (picture source)...
sophit's user avatar
  • 10.9k
1 vote

Pitch=Flight Path Angle + Angle of Attack if bank angle=0?

I think there's simply a typo in the last sentence of the slides: a "and $\beta$ is null" is missing where it said "If bank angle $\phi$ is null, then:". Or it has been implicitly ...
sophit's user avatar
  • 10.9k
1 vote
Accepted

Pitch=Flight Path Angle + Angle of Attack if bank angle=0?

You are correct, at least in theory. In order for the rule to be correct, we need to add one more criterion: that the sideslip angle is zero (or negligible). Here is an even more extreme example. ...
Tanner Swett's user avatar
  • 5,771
1 vote

How do engine doors work?

You typically have doors in the cowling forward of the compressor that are spring loaded closed and are pulled in by low pressure inside the inlet to allow more outside air into the compressor. Inlet ...
John K's user avatar
  • 130k

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