DB605AS info - need to determine WHERE and WHEN?

[George Hopp]

I have a test dated 17.4.44 on a Bf 109G W.Nr. 26108, SL+RR, powered by DB 605 A-So (sic) W.Nr. 10100702626 (sic). They were testing the effectiveness of the underwing radiators with the top 21 percent of the radiators blocked off. When blocked, the efficiency of the radiators dropped by 5 percent, from 91% to 86%.

Out of curiosity, does anyone know, and would they mind posting, the code numbers for the various companies building the DB 605? Thanks.

All the best,
George

[Tomislav Haramincic]

Hello again,

George, your test report just confirmed what Hilmar from the LBB Forum explained to me - there was no DB 605 ASO!
The designation "ASO" is in fact "ASo" indicating a normal AS engine. In the official Daimler-Benz correspondence, both the "ASo" designations and the "AS" were used.
The "So" has its roots in the Sonderausführung (german for special edition), the same as the "S" only the second letter was sometimes added. It is just a different stamping but meaning the same - an DB 605 A with an enlarged supercharger intake.

@ George
In what codes are you interested in? The three-letter producer codes or the three-number producer codes incoorporated into the engine serial number?

best regards,
Tomislav

[harrison987]

Just to confirm then...

There is no MW50 correct?

I am working with the re-build of a 109 and need to make suer that no MW50 is needed or was installed on the AS-O



Mike

[Tomislav Haramincic]

Originally Posted by harrison987

Just to confirm then...

There is no MW50 correct?

Correct!

[John Beaman]

The later AS engines and D engines used a special device to quickly change the timing of the engine to accomodate whatever octane fuel the unit could get or was delivered to them.

Back in the "old days" of working on Chrysler "hemi" engines we could do the same thing by adjusting the distributer position.

[Harold Lake]

Tomislav,

If your interpretation of the meaning of the "O" suffix is correct, i.e. "SOnder," then how do you explain the examples cited by S. Sheflin in which the "O" appears after the "M" as in "ASMO" ? Something is wrong here. It seems to me, for your explaination to be valid, then the order of letters should have been "ASOM", but that's not what happened.

Hal

[Revi16]

Not sure if this will help or add to the confusion?

[the_ivan]

I still think the dataplate means AS0 (zero number), designating the build-series.

So far I've seen DB 605 A-0, A-1, A-2, AS-0, AS-1, D-0, D-1 and D-2, as well as DB 603 A-0, A-1, A-2 and A-3.

Just MHO

[George Hopp]

Tomislav:
Since the Germans often printed zeroes as lower case Os, I would take the A-So to mean AS-0.

I am interested in the 3-number zero within the engine serial number for the DB 605. I have those for the DB 603 and would be happy to pass them on. Compared to the DB 605 there aren't many.

All the best,
George

[Tomislav Haramincic]

Originally Posted by George Hopp

Since the Germans often printed zeroes as lower case Os, I would take the A-So to mean AS-0.

I am interested in the 3-number zero within the engine serial number for the DB 605.

Hello,

The possibility that the ASO or ASo is in fact AS-zero ist still high. That would also then explain the ASMO - being ASM0. I'm trying to get an official list of subvariants of the DB605 from Daimler-Benz. If I recieve anything I will post it here. Perhaps then we will know more.

@ George
Here are the known codes:

002 - still unknown (DB 605A)
012 - still unknown (DB 605D)
112 - still unknown (DB 605D)
004 - Carl Fickert Maschinenfabrik, Schwarzenbach/Saale (DB 605) ?!? - unconfirmed
011 - Henschel-Flugmotorenbau GmbH, Kassel (DB 605A & D)
111 - Henschel-Flugmotorenbau GmbH, Kassel (DB 605D)
007 - Daimler-Benz Motoren GmbH, Genshagen Kreis Teltow (DB 605A)
117 - Daimler-Benz Motoren GmbH, Genshagen Kreis Teltow (DB 605D)
019 - Steyr-Daimler-Puch A.G., Werk Steyr (DB 605A)
119 - Steyr-Daimler-Puch A.G., Werk Steyr (DB 605D)

regards,
Tomislav