Re: Origin of "Cool your jets!" ?
- From: John Schilling <schillin@xxxxxxxxxxxxx>
- Date: Mon, 07 Jan 2008 18:31:36 -0800
On Sun, 6 Jan 2008 19:19:34 +0000 (UTC), jdnicoll@xxxxxxxxx (James Nicoll)
wrote:
In article <e097aa57-a3e9-43ce-a016-d86fc1d99ba9@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
T Guy <Tim.Bateman@xxxxxxxxxxxxxxxx> wrote:
(J Larson <seagull...@xxxxxxxxxxxx> ::
Indeed, I have to remind myself every so often that JPL stands for
Jet Propulsion Laboratory and was established by the California
Institute of Technology in the fall of 1936. If they used the term
jet in their name I would think they would expect it to be a known
term, therefore it should have been an established term for more than
a couple of years prior to the founding of JPL.
(T Guy):
And in Great Britain, Frank Whittle tried to interest the Air Ministry
in his invention, the jet engine, in 1931, IIRR.
No, the BBC implies it was 1929 and wikipedia states 1929 with Whittle
either patenting it in 1930 or being convinced to patent it by Johnny
Johnson in 1930. But wiki does also state that he was assessed by the
R. A. F. (as a pilot) as being 'Exceptional to Above Average.'
As stated elsethread, back then (1920s or so) rocket engines were
considered to be or referred to as jet engines, so this might be the
usage Smith is employing.
Henri Coanda was playing around with thermojets in 1910 but
he couldn't find funding, IIRC, and abandoned that line of research.
Except that he apparently did find sufficient funding to build and fly
a thermojet aircraft.
I think the deciding factor on a new line of research, was noticing that
the high-temperature exhaust of his *thermo*jet was not in fact being
ducted harmlessly out to the sides but was very neatly hugging the
sides of the aircraft. Which, while he was pondering the question of
"why is it doing that?", had managed to become somewhat airborne.
Important safety tip, probably even more important for people named
Nicoll than for the Coandas of the world: No matter that every other
airplane you've seen to date has the engine in front, if yours is
A: of wood-and-fabric construction and B: powered by a *jet* engine,
the engine does *not* belong in the front.
Coanda survived the somewhat incendiary crash, and spent the rest of
his career further exploring the "why was it doing that?" question.
Leading to the discovery of the Coanda Effect, of some small aeronautical
importance itself.
Roughly speaking, high-velocity gas streams (like jet engine exhaust)
tend to hug nearby surfaces even if those surfaces curve away from the
stream.
--
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- References:
- Origin of "Cool your jets!" ?
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