Author Topic: Proof of MW50 in... (Read 693 times)

MiloMorai · « **Reply #30 on:** June 16, 2002, 04:48:57 AM »

Henning, don't be so damn technical.

" Don't forget that MW50 is not pure water, though - a 50% methanol-water-mixture should be a bit lighter than water, about 0.895 kg/dm^3 I'd estimate."

The point tried to make was - still alot of weight behind the CG without any compensation in front for balance. Just trying to make some of them think.

********
my understanding:
The cooling of the mixture in the intake manifold was the first step in the process of obtaining more power. If the mixture's temperature was not brought down, the dieseling or pre-ignition occured. The cooler charge allowed an increase in boost pressure with its accompaning added heat.

cheers Milo

Wilbus · « **Reply #31 on:** June 16, 2002, 05:23:22 AM »

Milomarai, the weight is not much different from the AUX tank being filled with fuel, and when it is, the plane is stable.

MiloMorai · « **Reply #32 on:** June 16, 2002, 10:48:09 AM »

Wilbus, afaik the A-4 did not have this AUX tank.

Wilbus · « **Reply #33 on:** June 16, 2002, 11:48:53 AM »

Not most of them no. But I don't Otto Stammberger is a lier, thus he might very well have used it. Acording to my sources it was first beginning to be tested for the A4, then more on the A5 and finally being fully ready for the A8 and later.

HoHun · « **Reply #34 on:** June 16, 2002, 12:04:28 PM »

Hi Milo,

>Henning, don't be so damn technical.

LOL! I'll try to strike a better balance in the future :-)

>The point tried to make was - still alot of weight behind the CG without any compensation in front for balance. Just trying to make some of them think.

Worthy of consideration! But the center of gravity was dependend on the load-out, so it might have been possible to fill the MW50 tank as long as no bomb was carried, or something. (As I understand it, the point about the A-5 was eliminating centre of gravity problems for all possible load-outs.)

>The cooling of the mixture in the intake manifold was the first step in the process of obtaining more power. If the mixture's temperature was not brought down, the dieseling or pre-ignition occured. The cooler charge allowed an increase in boost pressure with its accompaning added heat.

Actually, cooling the charge "shrank" the intake air, increasing its density so that every intake stroke would draw an increased air mass into the engine. More air, more oxygen, more power :-) The anti-detonant effect was due to methanol being less volatile than 100 octane.

Methanol injection was pioneered in the USA, by the way, where it was employed in Indianapolis racers in the 1930s.

Regards,

Henning (HoHun)