posted 02-22- 05:35 AM               

li'l b

posted 02-22- 01:02 PM               

quote:

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Originally posted by li'l bastard:
Did we all forget about this? Wouldn't be nice to add this feature to the G and K versions? And what a bout an upgrade of the 109s? Eventually they were the most common german fighters around the WW2 skies...

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Do you mean GM-1 or MW-50, as opposed to glycol?

posted 02-22- 01:56 PM            

Werner

posted 02-23- 03:25 PM               

I know what you mean though Lil'B, and the stuff Maury mentioned is what you mean.

There were various ways of boosting the engines power for a short period. Some use Methanol, some used a fine mist of water ( sounds odd, but it works) and the principle was the same for both. They both cooled the inlet tract as they were injected, cooling the mixture charge too. This increased the air density, and effectively, meant there was more air in the cylinder charge. Inject more fuel, and you could burn it and get more power. Nitrous Oxide does a similar thing, only it provides the oxygen itself, and you just squirt in a dollop of fuel to go with it. If you want to see the effect of this on an internal combustion engine, watch some drag racers.....

Oh yeah....

The engine produces more heat when you burn more fuel.....so if you used it a lot, you got melted pistons....

posted 02-26- 06:36 PM               

quote:

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Originally posted by li'l bastard:
dunno about that techical, Maury, I just mean the glycole adding to the mixture in order to improve the performance of the engine, it could be used only for 10 mins or something, cause it was a kick in the ass and could break the engine!

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Yeah, that's the MW-50. I think you've just get the name confused, glycol is the stuff you put in the radiator of your car (or plane).

MW-50 was a mixture of water and alchohol. It was sprayed into the fuel as it came out of the supercharger (or sometimes between the two stages of the supercharger) and it cooled down the mixture. This increased the density of the fuel/air mix, which means you can pack more of it into the cylinders, and you get more power. The alcohol was mostly a anti-freeze.

The other system was GM-1, which was laughing gas. Basically the idea here is to pump oxygen into the engine when you're up really high and there's not a lot of air left. Laughing gas is a lot more dense than oxygen, so you get more per tank.

In the US and British planes they typically didn't bother with this sort of thing, they simply built better superchargers. The only big exception was the Hellcat which used water injection.

posted 02-26- 10:06 PM            

A 109 fix that would be nice is to fix the LODs so that when you're chasing a 109K the cockpit floor doesn't disappear. Very strange to be looking top down at a 109 and see ground, or in a turning fight, sky (though the top of the pit).

Werner