Well there is a school of thought in CASA that
you can't take off if the environmental
conditions are such that they exceed the
limitations of the type certificate and/or aren't on the P charts.
A lot of German gliders were certificated under
the assumption of 38 Deg C max air temperature
and the assumed duty cycle for loading was that
water would be carried 10% of the time.
The flash point of Jet A-1 is 38 Deg C min, so
you might have a problem if you have an aircraft
with not much fuel in than tanks and sit it out
on the ramp for hours on a very hot day. Even
then I think all that will happen is that a jet engine will start more easily.
Seen US airlines work? They don't make money
while sitting on the ground so turnarounds are
typically short. Any remnant fuel in the tanks
has been where the air temperature is -40 to -60
deg. I don't know the time constant of
temperature response of an airport storage tank
but as they are large and double walled (or so
I've read) I can think it is a long time so the
fuel is unlikely to get to the temperature maxima recorded at the AWS.
JP-4 as used by the USAF in their jets from 1951
to 1995 had a flash point of -18 deg C so the
engines were operating with fuel above its flash point much of the time.
Heavy water? Wimps! Use Tritium water and get
another 10%. Too bad it is much harder to get
than deuterium (heavy hydrogen), has some
"interesting" uses and is radioactive.
Mike
At 06:50 AM 10/30/2017, you wrote:
It is time again for the new Gliding
International and I will, as usual, go looking for the item on Global Warming.
I used to find these articles irritating but now
I have passed to the stage of seeing the
humorous side, especially as the intensity of
the alarmists rhetoric continues to ramp
up.. Since nothing much happens the debate
must be recast, firstly as Global Warming, then
Climate Change and now Climate Disruption!
The Sept/Oct edition did not disappoint with an
article titled; HEAT WAVES MAKE FLYING
WORSE. The article was about a heat wave in
Phoenix Arizona this year which saw some flights
cancelled because of the hot weather, The
story was published in the major USA daily
papers and IÂ first read it in the Washington
Post on June 22, 2017. The Gliding
International version included this startling
addition :"Some jet engines risked catching on
fire in the extreme heat" and it was accompanied
by a graphic proclaiming, "2016 was the Hottest
Year on Record. Blame Humanity, its official".Â
Maybe 2016 was a record hot year somewhere, but
not in Phoenix Arizona where similar or higher
temperatures have been recorded 15 times in the
past and not more than 22 years ago.
<http://www.news.com.au/travel/world-travel/north-america/it-is-so-hot-in-phoenix-that-planes-cant-fly/news-story/dfdcd68490ed9eaf37a5440b69ee56df>http://www.news.com.au/travel/world-travel/north-america/it-is-so-hot-in-phoenix-that-planes-cant-fly/news-story/dfdcd68490ed9eaf37a5440b69ee56df
Also B737 and A320 aircraft continued to operate
from the Phoenix airport though the heatwave.
But that was not all the entertainment to be had
because Myles Hynde, in another article, noted
that some ballasted gliders cannot reach their
maximum rated weight with a light pilot and
proposed filling the ballast tanks with heavy
water, noting that heavy water could be obtained from a sunken ferry in Norway.
This article was clearly not to be taken
seriously and did have some interesting aspects
but I was surprised to read about the water atom
(it is a molecule) and then noted that Myles had
incorrectly identified the Oxygen atom as the Â
one containing the additional neutron in the nucleus.
On Sun, Oct 29, 2017 at 3:33 PM, Gliding
International
<<mailto:[email protected]>[email protected]>
wrote:
The November issue goes in the mail October
31. The Digital issue will be released on November 3.
Â
The issue contains:
Â
1. A review at length on the Twin Shark from
Europe. This two seater has a good future. Â
The test flight report will appear in the following issue.
Â
2. Meantime, we some have great graphics on
the Euro Glider, (many wonât even have heard
about it). Â It will have twin electric motors
and is designed to be a basic trainer, one a
club can use for a whole day (without
recharges). This is all new thinking very interesting indeed.
Â
3, The lead story is about soaring in
Alaska. Bob Adams, the author has over 2000
hours soaring in Alaska. Â He provides some remarkable photography.
Â
4. The FES fire in two sailplanes is a
worry. We provide details of the FES fire in
the United Kingdom with a response from the
manufacturers on the issue. Â You should read
this if you have any plans to buy/fit a FES.
Â
5. A new jet unit has been tested by
Germanyâs Aerospace centre. It is
electrically driven with a promising future.
Gliding is a future consideration for the concept.
Â
6. Aldo Cernezzi puts his thoughts on paper
about the world wide decline in membership.
Â
7. We discovered that the very first aero-tow
was made in 1922. We have a report in detail
as to how/why/where it happened. Supported by
some amazing photos, all taken 95 years
ago. They have reproduced remarkably well.
Â
8. Your tow-plane could be running on fuel
extracted from sugar cane. A new concept worthy of further thought.
Â
9. DOHACKIES is the name coined for the latest
in winglets. Who is going to be the first
manufacturer to fit them to a sailplane?
Â
10. Are you worried about Drones? You should
be! The conference in Switzerland last month
brought forth a paper that declared aviators can
expect to compete with seven million drones with
seven metre wing spans by 2030. Â (400,00 will
be commercial drones). This is news but not good news!
Â
11. Canada seems to be the only ATC
organisation that operates a system at a
fraction of the cost than others. No other
country matches their cost structure and
service! Â They just refunded users with $US60 million.
Â
12. A good report on a happy marriage between
The European Aviation Safety Agency and the European Gliding Union.
Â
13. Some major improvements in battery
technology. Two papers from two different
organisations give readers an insight into the Â
major projects going on at different ends of the globe.
Â
14. Likewise the big money being applied into
electric aircraft and self-launchers research.
Â
15. All this and 30 other stories to inform
the gliding community on the world scene. And we
have just announced a readership promotion. All
new subscribers thorough to December 31 will
receive a free DVD Gladiators of the Skyâ Â
-- the biggest gliding film ever. Â See us at
<http://www.glidinginternational.com>www.glidinginternational.com
Â
Â
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