Researching the DB605 DM

[Kurfürst]

Originally Posted by schwarze-man

Hi again Kurfurst,
I read your post again. Thanks for the thoughts. So, I wonder, are you trying to say that you know of a DB 605 D Flugmotor Handbuch? I agree that this could exist as, there were advanced plans to produce the the basic DB 605 D in early 1944. If this is so, I would be very interested!

Cheers

SM

Unfortunately no, I am only aware of the (Entwurf) 9-605 DB u. DC. Ausgabe C, 1 Dezember 1944 and the 'Kennzeichen des Baumusters DB605 D 5 Dezember 1944'. I am afraid I have never seen a complete 'Handbuch' or 'Motorenkarte in the manner of those produced for the 605A series.

I know of course of the early DM document referenced in the K-4 Handbuch but have never seen it myself.

There is also a hint from MTTAG record of meeting from 20 December 1944 bei DB-UT, which instructs crews to mark engines set to 1.8 ata with a big white 'B' next to the D letter on the Kurbelgehäuse, and a big white 'C' in case of 1.98ata setting. In case of changing the manifold pressure the markings are to be correspondingly modified. Also some GLC datasheets from show only '605D', next to be both 1.8/1.98 ata power curves.

So I am fairly certain the entire D series is the same engine, which saw some minimal changes, boosts.

Herr Baumgartl has an interesting reference in his book 'Lehrunterlangen für die Baumuster DB 601 E-G u. 605 A-D, Flieger-tech. Schule 3 München 67, T.S. 3-2024a, Teil 1. Baumuster Beschreibung für die DB 601 E-G, DB 605 A-B, AS-BS, AM-ASM, D-E, DM. from DBAG Flugmotoren Bd. 149.' This seems to be a rather complete, common manual for these engines on various technical aspects as he references it a lot.

I can't recommend highly enough getting Herr Baumgartl's book as he has done excellent research. The chapters 34-35 of 50 pages is exclusively dedicated to DB 605D development and improvement of performance, which I am sure you would find highly interesting.

[schwarze-man]

Originally Posted by Kurfürst

Unfortunately no, I am only aware of the (Entwurf) 9-605 DB u. DC. Ausgabe C, 1 Dezember 1944 and the 'Kennzeichen des Baumusters DB605 D 5 Dezember 1944'. I am afraid I have never seen a complete 'Handbuch' or 'Motorenkarte in the manner of those produced for the 605A series.

I know of course of the early DM document referenced in the K-4 Handbuch but have never seen it myself.

There is also a hint from MTTAG record of meeting from 20 December 1944 bei DB-UT, which instructs crews to mark engines set to 1.8 ata with a big white 'B' next to the D letter on the Kurbelgehäuse, and a big white 'C' in case of 1.98ata setting. In case of changing the manifold pressure the markings are to be correspondingly modified. Also some GLC datasheets from show only '605D', next to be both 1.8/1.98 ata power curves.

So I am fairly certain the entire D series is the same engine, which saw some minimal changes, boosts.

Herr Baumgartl has an interesting reference in his book 'Lehrunterlangen für die Baumuster DB 601 E-G u. 605 A-D, Flieger-tech. Schule 3 München 67, T.S. 3-2024a, Teil 1. Baumuster Beschreibung für die DB 601 E-G, DB 605 A-B, AS-BS, AM-ASM, D-E, DM. from DBAG Flugmotoren Bd. 149.' This seems to be a rather complete, common manual for these engines on various technical aspects as he references it a lot.

I can't recommend highly enough getting Herr Baumgartl's book as he has done excellent research. The chapters 34-35 of 50 pages is exclusively dedicated to DB 605D development and improvement of performance, which I am sure you would find highly interesting.

Hi Kurfurst,
Thank you for info. Yes, I have these documents. However, I do not think that I have all of the book by Herr Baumgartl. Is it possible that you can give me a help to get this book or a copy. I would appreciate it if you can!
As regards the versions of the D, DM, DB and DC being the same, there are several changes of components that I know of. However, I can agree the basic versions of those engines produced after July '44 are very similar, although with minor changes.
Cheers

SM

[schwarze-man]

Just to up-date this thread.
Having obtained a copy of the excellent book "Das Jagdflugzeug Messerschmitt Bf 109. Technik / Eigenschaften / Leistung / Stückzahlen / Bewährung" by Michael Baumgartl, I can confirm that the background information regarding the development of the DB 605 D versions is fully covered in that great book!
However, I still feel that the technical documentation of the late DB 605 D engines that is known to exist today is incomplete. Considering that the DB 605 D engine was in production from early 1944, at several major factories and in fighting service from Autumn 1944, there must have been technical documentation for the troops. So, I remain searching for the Handbuch and other documents for the DB 605 D and any information that anyone knows of would be gratefully received!

SM