Aces High Bulletin Board
General Forums => Aircraft and Vehicles => Topic started by: niklas on February 08, 2001, 02:16:00 PM
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Hi
I read now several times a number for the G10: 685km/h in 7,4km altitude. Nowarra i.e. has this number in his book, and i saw a smiliar number in an english table, too.
I think this paper has the same source, maybe Nowarras number is even based on this document.
(http://people.freenet.de/luftwaffeln/G_685_o.gif)
Note: i deleted the engine and power row (but i donīt think what was written there is correct)
So the big question: Which DB605 engine has for topspeed a rated altitude of 7,4km and pushes a 109 to 685km/h ??
niklas
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I'm going to guess the DB605L.
Here's a neat site I found with a good drawing of a DB605.
http://www.aviation-history.com/engines/db605.htm (http://www.aviation-history.com/engines/db605.htm)
[This message has been edited by Jimdandy (edited 02-08-2001).]
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hmm only 2 Bf109k-14 were equipped with the 605L engine at the end of the war.
Furthermore the 605L had a rated altitude of 10km
no, not the L!
try again (http://bbs.hitechcreations.com/smf/Smileys/default/smile.gif)
niklas
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DB 605DC.
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hmm the 605DC was able to put out 2000hp with mw50. 550kmh would be a little bit slow at sealevel for 2000hp, right?
And it had a rated altitude of 4,9km/1800hp
Another idea?
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write a book?
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btw it is the DC, dunno where you're getting your info.
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See my post below.
[This message has been edited by C_R_Caldwell (edited 02-08-2001).]
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The G-10 construction program was an effort by the RLM to re-build existing airframes to a roughly comparable standard to the K-4.Unfortunately, sufficient DB605D powerplants were not available at 1st, so initially, most early G-10's were produced with the DB605AS powerplant (very similar to the DB605D, it had the DB603's larger supercharger).Later models, however, used the DB605DCM powerplant, as did the K-4.The letter 'C' in the engine nomenclature denotes that the engine is using hi-octane avgas.The 'M' denotes that an MW-50 methanol-water system is in use.So a DB605D using hi-octane gas & MW-50 was known as a DB605DCM.
You may have seen in many publications that the K-4 used the DB605DCM or DB605ASCM. Again, the DB605AS is very similar in output to the DB605D (there isn't a huge deficit in output) & a/c that use it have the same "refined" cowling without the MG 131 bulges.So, a DB605AS using hi-octane gas & MW-50 was known as a DB605ASCM.Also, the 'S'in DB605AS denotes the powerplant is modified & fitted with an enlarged blower. Does that make any sense at all?!?!
Btw, that's why you see the standard 109G-6 listed as using a DB605AM powerplant.It is simply a standard DB605A using MW-50.Several hundred G-6's & an even greater number of G-14's were re-engined with the DB605AS engine, these models being called the 109G-6/AS & G-14/AS respectively.
The DB605L would not have been used in the G-10 at any stage.As mentioned earlier, at most a couple of K-14 prototypes *may* have been built using this engine, but as the factory & test facility building the DB605L was destroyed by Allied bombing several months before the end of the war, no production models were built.Messerschmitt estimated the Me 109K-14's maximum true airspeed as being 452 mph at 37,730 ft.
I hope this was of some use to you.This info has come from various books & publications I own, most notably the Bf/Me 109 "bible" of sorts, William Green's "The Augsburg Eagle".
[This message has been edited by C_R_Caldwell (edited 02-08-2001).]
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ok now this is what i deleted from the picture:
(http://people.freenet.de/luftwaffeln/G_685.gif)
I read in a book that the supercharger of the db605 had at the beginning a rated altitude of 5,7km, later 6,5km.
So was it a 605AC engine, with improved rated altitude? Or had it already the larger supercharger of the 603, and it was a ASC? Or was it (what the author deleted) a early 605D1 engine (1550HP, rated altitude 6500m, Nath did you mean this engine?)
To make it a little bit more confusing. Here is a table of the Macchi 205 series:
(http://people.freenet.de/luftwaffeln/mc205.gif)
you can see that all 205 have the 605A engine with 1475HP, but the altitude where the V has the topspeed is 1000m higher (again 7,5km) than the altitude of the N (6,5km).
Was the 205V equipped with early 605D engines? Or ASC? Did the late 605A engine have a rated altitude of 6,5km? Or are there other reasons?
niklas
[This message has been edited by niklas (edited 02-09-2001).]
[This message has been edited by niklas (edited 02-09-2001).]