Why do jets leave a white trail behind them.

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