Hey, you're gonna have to heat the diesel fuel to keep it from gelling so
why not use the fuel as a coolant. If the tanks are of the wet wing type,
you're almost home free. (I actually had a guy ask me how that would cool
the engine if I ran out of fuel.)

Bill Daniels


"Morgans" wrote in message
...

wrote

It might even be possible to just ignore the radiator completely and
turn the skin of the aircraft into the heat sink. Basically you'd route
several flows of 3/8" aluminum tubing strategically about the airplane.
You could end up with a deicing system instead of a radiator! It would
probably take more line/water than was in the radiator, but it might
make up for it in aerodynamics. (No radiator hanging in the breeze) I'd
have to crunch the numbers, it probably isn't feasable, but it's a
thought.

Before you get carried away with that idea, there are a lot of problems
with
that idea. You can google the threads on them, but I'll point out a few
of
the problems with the idea.

1. A cooling system has to be reliable, to the max. Adding a bunch of
lines and fittings is a good place to have problems pop up.

2. Weight. You add all of the lines, and fluid, and you have added a
bunch
of weight.

3. De-ice takes a lot of heat to do a decent job. Even if you used all of
the BTU's from burning 100% of the gas that the engine would be burning,
there is not enough heat in the gas to thaw out a wing. Take the
approximate 50% heat output of the engine, subtract the realistic
efficiency
of getting all of that heat to the wing, (you would have to bond that tube
to the wing mechanically) and you have cut the amount of heat trying to
melt
the ice by even more.

4. Heat transfer from the hot wing skins to the air is really poor. This
is because of the stagnant layer of air sitting right on the surface of
the
wing. Simply put, the air is not carrying the heat away from the wing
very
well, at all.

Those are just the high points. Think of it this way; if this idea would
work well, lots of planes in the past and present would have been using
them. They are not.
--
Jim in NC