----- Original Message -----
From: "Edward Swynar" <gswynar@durham.net>
To: "Roger" <sub1@rogerhalstead.com>; "Paul Decker" <kg7hf@comcast.net>
Cc: <amps@contesting.com>
Sent: Sunday, March 28, 2010 7:21 AM
Subject: Re: [Amps] Good engineering
> On 28th March, Roger wrote:
>
> "...I hate to mention this, but as you mentioned it, many airframes are
> life
> cycle limited. So many takeoffs and landings and it's rebuild time.
> Aircraft engines are basically life limited to either so many hours, so
> many
> start cycles, or a combination."
>
> ************************************
>
> Ho Roger,
>
> I guess the point being originally made was the fact that the professor in
> question was espousing an engineering policy of deliberate "...planned
> obsolesence", vs. a "natural" one, i.e. one that follows the laws of
> physics
> & nature, & which can be anticipated & "maintained"...
>
> There's difference between a light bulb burning out after 5 thousand
> hours,
> say, and other things. For instance, can you just imagine the broohaha
> that
> would arise if you were to be on some trans-continental air flight, & a
> voice came over the speaker saying, "Good day, ladies & gentlemen, this is
> your captain speaking. It may interest you to know that somewhere over
> Nebraska the body of this aircraft will have just exceeded the life
> expectancy of its stressed aluminum framework. However, our arrival in LAX
> should not be affected." Hi Hi.
>
> ~73~ de Eddy VE3CUI - VE3XZ
-------------------------cut----------------------------------
Also comforting to our Boeing B52 aircrews as well...
Cecil..
K5DL
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