A tragedy - a Minden death today!

Except two strokes perhaps.Point taken though.

The only problem is that you need to be able to turn cabin heat off and on
so that would involve high pressure, high reliability valves, two expensive
radiators and high pressure tubing. Perhaps a closed circuit heat exchanger
to a water filled system would work. Now you've added perhaps 3 - 4 kg of
radiator and tubing plus another 4 or 5 litres of water. Hmm, one can see
why the exhaust muff got in there in the first place.

Ian

"Bill Daniels" wrote in message
news:9rjfd.315606$D%.36715@attbi_s51...

"John Sinclair" wrote in message
...
I see the Carat comes with cabin heat. These systems
typically send engine exhaust through a heat exchanger
that heats the cabin air. A crack or leak in this system
can result in exhaust fumes in the cockpit. I would
expect the cabin heat to be in use on this wave flight.
This scenario would square with the apparent total
loss of control while still under full power. Food
for thought.

This is a beautiful sport, but not without its dangers.
My condolences to Alan Pratt's family and friends.
JJ Sinclair


Heating a cockpit with an exhaust muff is one of the dumbest ideas in the
history of aviation. All recips can benefit from an oil cooler so why not
heat the cabin with hot oil?

Bill Daniels

tango4 wrote:

The only problem is that you need to be able to turn cabin heat off and on
so that would involve high pressure, high reliability valves, two expensive
radiators and high pressure tubing. Perhaps a closed circuit heat exchanger
to a water filled system would work. Now you've added perhaps 3 - 4 kg of
radiator and tubing plus another 4 or 5 litres of water. Hmm, one can see
why the exhaust muff got in there in the first place.

The exhaust muff systems don't control the source of heat, they control
the proportion of heated air entering the cockpit. Oil heated systems
would/could use almost exactly the same plumbing and controls.

I think the main objection would be to having a permanent faint whiff of
oil in the cabin air.

Graeme Cant


Ian

"Bill Daniels" wrote in message
news:9rjfd.315606$D%.36715@attbi_s51...

"John Sinclair" wrote in message
...

I see the Carat comes with cabin heat. These systems
typically send engine exhaust through a heat exchanger
that heats the cabin air. A crack or leak in this system
can result in exhaust fumes in the cockpit. I would
expect the cabin heat to be in use on this wave flight.
This scenario would square with the apparent total
loss of control while still under full power. Food
for thought.

This is a beautiful sport, but not without its dangers.
My condolences to Alan Pratt's family and friends.
JJ Sinclair



Heating a cockpit with an exhaust muff is one of the dumbest ideas in the
history of aviation. All recips can benefit from an oil cooler so why not
heat the cabin with hot oil?

Bill Daniels

Except two strokes perhaps.Point taken though.

The only problem is that you need to be able to turn cabin heat off and on
so that would involve high pressure, high reliability valves, two expensive
radiators and high pressure tubing. Perhaps a closed circuit heat exchanger
to a water filled system would work. Now you've added perhaps 3 - 4 kg of
radiator and tubing plus another 4 or 5 litres of water. Hmm, one can see
why the exhaust muff got in there in the first place.

Ian

Not quite so, Ian. The oil cooler would always be cooling the oil,
just what you do with the warm air downstream from it is the issue. A
simple vane valve diverts the warm air either into the cabine or out
into the atmosphere. Simple and light-weight!

Uli

"Ulrich Neumann" wrote in message
om...
Except two strokes perhaps.Point taken though.

The only problem is that you need to be able to turn cabin heat off and
on
so that would involve high pressure, high reliability valves, two
expensive
radiators and high pressure tubing. Perhaps a closed circuit heat
exchanger
to a water filled system would work. Now you've added perhaps 3 - 4 kg
of
radiator and tubing plus another 4 or 5 litres of water. Hmm, one can
see
why the exhaust muff got in there in the first place.

Ian

Not quite so, Ian. The oil cooler would always be cooling the oil,
just what you do with the warm air downstream from it is the issue. A
simple vane valve diverts the warm air either into the cabine or out
into the atmosphere. Simple and light-weight!

Uli

Once while droning through a cold, wet and bumpy night I got to thinking
that of all the things I could be worrying about, the worst was that 2mm of
red hot steel separating hot, poisonous exhaust gasses from the cabin air.
Exhaust muffs are scary.

It's one of the reasons I enjoy flying gliders more than airplanes.

Bill Daniels