Why do jets leave a white trail behind them.

"Morgans" wrote in message
...

To the other person that said there is not enough left over H to make
water with the O in the air, sorry, incorrect. Water and heat are two
byproducts of combustion. I wish I remembered enough chemistry to balance
the equation. No, I don't! g
--
Jim in NC

HnCm + (n/4 + m)O2 = (n/2)H2O + mCO2

where n and m are the number of H and C atoms in your fuel molecule.

--
Geoff
the sea hawk at wow way d0t com
remove spaces and make the obvious substitutions to reply by mail
Spell checking is left as an excercise for the reader.

"Matt Whiting" wrote in message
...
If jet fuel is full of water, how do you get it to burn? When I took
chemistry, hydrocarbon fuels contained .... drum roll please ... carbon
and hydrogen. No water of any level of significance.

For it to burn, there must be oxygen present, right? And hydrogen and
oxygen give you what?

I did not mean to say that the entire tank was heated [poor
choice of words on my part] but they do heat the area near
the fuel pickup/screen or use PRIST.


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"Bob Moore" wrote in message
. 121...
| "Morgans" wrote
|
|
| "Jim Macklin"
wrote in
| message news:kbWzf.66479$QW2.33865@dukeread08...
| Most jet aircraft have heated fuel tanks and or use
PRIST.
| The fuel control units are heated by engine oil or
electric
| elements so the screens stay ice free.
| \\
| Yes, I do know all of that, but do smaller jet fueled
planes
| (Malibu and smaller) have heated tanks?
|
| I don't know about the Malibu, but the large jet
transports that I
| have flown, B-707, B-727, certainly did not have heated
fuel tanks.
| Yep, the fuel filters had a heating capability using bleed
air from
| the engine compressors.....flightcrew controlled. At
higher Mach
| numbers (.80+), the temperature ram rise at the wing
leading edge
| kept the fuel from waxing under most circumstances.
|
| Bob Moore

AliR,

if you want some fun, look under chemtrails, too. But don't believe
what you read, please.

--
Thomas Borchert (EDDH)

On Thu, 19 Jan 2006 20:47:25 -0000, Skywise
wrote:

Well, they must have been doing this since at least WWII, if not
sooner, as I regularly see footage of WWII bombers making trails
over Europe on various cable/sat documentary channels.

Before the bombers there were the fighters in the Battle of Britain.
Really crazy-quilt vapor trails.


-- all the best, Dan Ford

email: usenet AT danford DOT net

Warbird's Forum: www.warbirdforum.com
Piper Cub Forum: www.pipercubforum.com
In Search of Lost Time: www.readingproust.com

On Thu, 19 Jan 2006 18:31:45 -0500, "Morgans"
wrote:

Jet fuel, kerosene, diesel fuel, are all hygroscopic. That means that they
have an affinity for absorbing water. Great amounts of it. If they absorb
enough, then it will not burn.

I suppose that's how algae(?) gets to grow in fuel tanks? A friend has
a boat with one diesel tank that's full of gunk; he can't get it out.
And I recall that years ago Pease Air Force Base nearby was bedeviled
by stuff growing in some of its jet-fuel tanks.


-- all the best, Dan Ford

email: usenet AT danford DOT net

Warbird's Forum: www.warbirdforum.com
Piper Cub Forum: www.pipercubforum.com
In Search of Lost Time: www.readingproust.com

Grumman-581 wrote:
"Matt Whiting" wrote in message
...

If jet fuel is full of water, how do you get it to burn? When I took
chemistry, hydrocarbon fuels contained .... drum roll please ... carbon
and hydrogen. No water of any level of significance.


For it to burn, there must be oxygen present, right? And hydrogen and
oxygen give you what?

Hint: the oxygen doesn't come from the fuel. Hence the fuel isn't full
of oxygen. The fuel is full of hydrogen. That is only half of what you
need to make water.


Matt

PRIST is a chemical used to kill fungus in kerosene based
fuels and also prevents ice formation. It is pre-blended in
some jet fuel or added at the pump nozzle. It has to be
mixed with the fuel, not just poured in the tank.

It is poisonous. http://csdinc.org/prist/


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.




"Cub Driver" usenet AT danford DOT net wrote in message
news | On Thu, 19 Jan 2006 18:31:45 -0500, "Morgans"
| wrote:
|
| Jet fuel, kerosene, diesel fuel, are all hygroscopic.
That means that they
| have an affinity for absorbing water. Great amounts of
it. If they absorb
| enough, then it will not burn.
|
| I suppose that's how algae(?) gets to grow in fuel tanks?
A friend has
| a boat with one diesel tank that's full of gunk; he can't
get it out.
| And I recall that years ago Pease Air Force Base nearby
was bedeviled
| by stuff growing in some of its jet-fuel tanks.
|
|
| -- all the best, Dan Ford
|
| email: usenet AT danford DOT net
|
| Warbird's Forum: www.warbirdforum.com
| Piper Cub Forum: www.pipercubforum.com
| In Search of Lost Time: www.readingproust.com

Darkwing wrote:

Here is the deal on "chemtrails". Ever notice on a nice day with no low,
medium or high clouds that jets also leave no vapor trails? Why?

Because it's too hard to hide them on clear days!


-m
--
## Mark T. Dame
## VP, Product Development
## MFM Software, Inc. (http://www.mfm.com/)
"Artificial intelligence researchers were, at times, paradoxically
regarded as both the elite and the "lunatic fringe" of computer
science."
-- Artificial Intelligence Using C, Herbert Schildt

You guys really need a refresher course in chemistry. When hydrocarbons
burn, the Hydrogen atoms are split off of the carbon. The hydrogen then
combines with Oxygen forming water. The carbon combines with Oxygen to form
CO2. All of this creates lots of heat. There is no "unclaimed" hydrogen.

Also, normal fuel is NOT hydroscopic. Water and fuel don't mix. That's why
you drain it out of the sumps. The water occurs in fuel tanks from
condensation from air in the tanks. It then settles to the bottom of the
tank, as it is heavier than fuel. If there is any significant amount of
water in the fuel, you've got very BIG problems (either your trying to burn
pure water, or you've got frozen fuel lines).

As a side note, some aircraft engines have used water injection as a method
to increase power output during takeoffs.

Mike Schumann

"Morgans" wrote in message
...

"Matt Whiting" wrote

If jet fuel is full of water, how do you get it to burn? When I took
chemistry, hydrocarbon fuels contained .... drum roll please ... carbon
and hydrogen. No water of any level of significance.
\\
Combustion leaves some hydrogen unclaimed, and the oxygen is really happy
to claim it, and when it combines two H's, and one O, you get water.

Weren't awake during that day of chemistry, were you, Matt? g
--
Jim in NC