Now the grammar gremlin got to me. I mean't "I'm"......
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Jim Nichols" <jhnichols@xxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Friday, August 26, 2011 12:23 AM
Subject: Re: [OM] Titanic, was More from the Airport
> Chris,
>
> I trying to recall something I read a number of years ago. In an upper
> corner of the flight envelope, the cruise AoA can approach the stall AoA.
> Think of it this way: The aircraft weight does not change, except for the
> fuel that is burned off. As you climb to jet cruising altitudes, the air
> density falls rapidly, so the dynamic pressure, or "q", falls off as well.
> This means that, in order to support the weight, the wing requires higher
> and higher angles of attack. When the flight AoA approaches the stall AoA
> for the flight Mach number, it takes very little stick force to get into
> trouble. For crews flying fly by wire systems with computers in the loop,
> they very seldom experience the subtleties of hand flying in this regime.
> Loss of pitot pressure on a dark night under such conditions is a
> worst-case
> scenario.
>
> I've heard the term "departure" used to describe the loss of flying
> ability
> in such cases. I think I first heard of it in reference to the early Lear
> jets.
>
> Jim Nichols
> Tullahoma, TN USA
> ----- Original Message -----
> From: "Chris Barker" <ftog@xxxxxxxxxxxxxx>
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Thursday, August 25, 2011 11:43 PM
> Subject: Re: [OM] Titanic, was More from the Airport
>
>
>> Jim
>>
>> It would be bad if there were no indication of AoA, but I don't know for
>> certain what they have.
>>
>> Chris
>>
>> On Thursday, 25 August 2011, Jim Nichols <jhnichols@xxxxxxxxxxxxx> wrote:
>>> Piers,
>>>
>>> Thanks for the link. As an aeronautical engineer with a career in wind
>>> tunnel testing, and as a civilian pilot, that was interesting reading.
>>>
>>> I noted that the Company's actions did not make reference to the
>>> recommendation of an AOA indication in the cockpit in view of the
>>> pilots.
>>> Some other articles I have read recently have considered this to be a
>>> worthwhile addition in many aircraft. I have seen sensors on several
>>> business jets, but have no idea how the data are used or displayed.
>>>
>> --
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>>
>
>
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