That's the one Jerry. And the wonderful F-16 and F-18 will develop a sheet
of moisture over the whole surface of the wing (and the fuselage for the
F-16) because they have relatively efficient lifting surfaces that wash out
little lift towards the wingtip.
Chris
--
><> Chris Barker
mailto:cmib@xxxxxxxxxxxxxxx
----------
>From: "W. J. Liles" <wliles@xxxxxxxxx>
>To: olympus@xxxxxxxxxxxxxxx
>Subject: Re: OT!! RE: [OM] Notes on the road
>Date: Thu30 Dec 1999 23:54
>
> Acer V wrote:
>>
>> <snip>
>> Jerry, condensation? On one hand, it makes sense (how else would "vapor"
>> be visible?), so the reduced air pressure causes the air to cool, which
>> causes condensation?
>
> Acer
> That's correct. An expanding gas, in this case air, will cool. If it
> cools below the dew point it will cause the water vapor in the air to
> condense. Air flowing over the top of a wing experiences a drop in air
> pressure (that is it expands) and therefore it cools. The amount of
> pressure drop will vary depending on how much lift is being generated.
> At take off and in high speed manoeuvers the pressure drop is greatest
> and , therefore, that is when you are most likely to see "vapor" over
> and behind the wing and tail surfaces.
>
> Jerry Liles
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|