[Diy_efi] Water metanol turbo assist

[Mike]

yes I remember a british pilot saying they used water injection
(at quite a high rate) on the spitfires (1942), but they said it was
only reserved for emergencies and a log needed to be kept of
how often it was used on a particular engine, anyway the pilot
said the effect was dramatc - made a big improvement to engine
output power ! I guess thats not normal WI then,

rgds

mike



At 11:13 AM 1/9/03 -0500, you wrote:
>The SAE published a book by Graham White on WW2 Allied Aircraft piston
>engines.  In it he talks a bit about oil filtration,  they sure were not
>using spin on cartridge filters.
>Some applications used engine driven centrifugal filter.  Their filtering
>requirements included dealing with Aviation gas injected into the oil
>(lowers viscosity) before engine down so it would be easier to start up in
>the cold.  ADI (water/methonol injection) was only for perfomance
>enhanement, to lift an over loaded bomber or help you out run someone who
>was shooting at you. 
>
>> -----Original Message-----
>> From:	arnie [SMTP:arnie_ at charter.net]
>> Sent:	Sunday, January 05, 2003 10:28 AM
>> To:	diy_efi at diy-efi.org
>> Subject:	Re: [Diy_efi] Water metanol turbo assist 
>> 
>> > This is true.  I somehow doubt that very much of the water used
>> > in water injection at even 70% of fuel volume gets into the oil pan,
>> > especially (if it) is properly atomized in the intake.
>> 
>> When 30% of the oil pan contents (by weight) is water, that 'red flag'
>> had better be waivin'.  Adam, I agree the ring material, honing
>> techniques,
>> the oil composition itself, and thus, sealing efficiency of today is
>> superior
>> to the WW2 era, so it is likely that quantity of water found in the pan
>> will
>> be less.  However, I fail to see how the actual amount of cylinder wall
>> washing (or the ability of the water to 'scrub' the walls) will change
>> much,
>> given the superior oil of today.
>> 
>> It strikes me odd, (actually I find it somewhat amusing) that with the
>> amount of emphasis placed on documenting the performance merits
>> of WI observed in the testing, in that (NACA) report, there was a
>> conspicuous lack of attention/concern  given to the water dilution in
>> the oil.  It would appear to me, that objectives had been set, and the
>> 'correct' conclusions were to be achieved, come hell or high water.  :)
>> 
>> Btw, Adam ?, ah, actually I don't subscribe to the 'kinder gentler'
>> America theme.   :)   :D
>> 
>> GAS
>> 
>> ----- Original Message -----
>> From: "Adam Wade" <espresso_doppio at yahoo.com>
>> To: <diy_efi at diy-efi.org>
>> Sent: Sunday, January 05, 2003 3:50 AM
>> Subject: Re: [Diy_efi] Water metanol turbo assist
>> 
>> 
>> > --- arnie <arnie_ at charter.net> wrote:
>> >
>> > > with an unacceptable amount of water finding it's
>> > > way to the pan, relatively speaking, it is STILL a
>> > > HELL of a lot of water.  :)
>> >
>> > This is true.  I somehow doubt that very much of the
>> > water used in water injection at even 70% of fuel
>> > volume gets into the oil pan, especially is properly
>> > atomized in the intake.
>> >
>> > I'd be interested to see the differences in moisture
>> > content between two identical engines, one running
>> > water injection and one not, in the same spot, run
>> > under the same loading, yadda yadda.  I have hunches
>> > about what I'd find, but not well-backed enough to
>> > voice them.  ;)
>> >
>> > Anyone have anything like that?  I'd presume the
>> > results would be improved over those of WWII aircraft,
>> > if only because of the better atomization and tighter
>> > tolerances in modern injectors and engines, respectively.
>> >
>> > Adam Wade
>> 
>> 
>> 
>> 
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