[MV] water/methanol injection

A.Mehlhorn (a.mehlhorn@t-online.de)
Thu, 12 Nov 98 16:35 +0100

The big German aircraft engines (aircraft are MVs, too!) of
WW2 injected a mixture of methanol and water to get an extra
emergency combat power for a short while. At first they used
laughing gas (NOx?) for this, but the bottle with the
pressurised laughing gas was located behind the pilot's seat.
If this bottle was hit by a round, it exploded like a bomb.
The pilots didn't like that. So they used later the water/
methanol mixture, which was much safer to store.

In a supercharged engine, you have always problems with the
temperature of the fresh air/fuel mixture. Behind the charger
you have high temperatures. The water works like an intercooler.
The methanol works as extra fuel. So a colder mixture (= more
mass of the mixture in the cylinder = more power) and the extra
fuel gave some hundred extra horsepowers for the emergency
combat power.

Regards
Andreas


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