DB605A late?

Discussion in 'Engines' started by CPWN, Nov 15, 2007.

  1. CPWN

    CPWN Member

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    In some flightsim game discussion,I saw the DB605A was described as below:

    DB605A early →1.42ata 1355HP @ 100% / 1475HP @ 110%

    DB605A late →1.42ata 1300HP @ 100% / 1550HP @ 110%

    But I can't find any other resources or documents to prove it, is that true or false?

    thx for reply:D
     
  2. mad_max

    mad_max Member

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    They have different superchargers, hence they have different performance figures
    at different altitudes. Combined with some having MW injection and others GM-1.

    THere's more to HP figures than just reading how much each one has.
     
  3. CPWN

    CPWN Member

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    I am sure the DB605A in discussion hasn't MW50 or GM1. If they do have it,it should be DB605AM...etc and more power than 1550hp.:confused: Still thx a lot:D
     
  4. mad_max

    mad_max Member

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    Well I wanted to email you some copies of stuff I have, but I guess you know
    the answer to your own question then. :rolleyes:
     
  5. Civettone

    Civettone Active Member

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    Perhaps you can check out Kurfursts website. kurfurst.allaboutwarfare.com

    Kris
     
  6. Denniss

    Denniss Active Member

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    The DB 605A has always been rated for 1475PS at 1.42 ata and 2800 rpm as maximum power for 5 minutes (Start-und Notleistung, take-off and emergency power).
    Initially (late 1942, early 1943) this rating had to be reduced because of reliability problems causing engine parts to break so the 30 min climb and combat power (Steig- und Kampfleistung) of 1310 PS at 1.30 ata and 2600 rpm became the max power. Full power was cleared somewhere in October to December 1943.

    1355PS ist emergency power at (static) rated altitude of 5.7km.
    The only engine with 1550PS take-off power might be the DB 605DC if used with C3 fuel but without MW-50.

    I don't know what the real problem was on early DB 605A but I remember something with bubbles in the oil circle thus not enough oil on certain engine parts and that's not very good.
     
  7. CPWN

    CPWN Member

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    Thank you guys.I have received a mail about DB605 from mad_max. The document says there is a project which try to upgrade DB605A's power by C3 fuel and the prototype got 1550hp,but finally it was been canceled.:(
     
  8. Kurfürst

    Kurfürst Banned

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    As Deniss said, these all appear to be correct, but they refer to different altitudes.

    For example, at 1,42ata the DB 605A would develop 1475 PS at Sea level; this is what generally given. At around 2100m altitude and the same ratins, the output peaks out at 1550 PS; at 5.7km altitude, same ratings, the output is 1355 PS.

    There`s a lot of confusion because of this, countries reported max output differently, some at SL, some at the peak output, there`s a difference between metric and imperial horsepowers, some tended to use rammed powers more often, while others expressed using static power output etc.

    For example, if the DB 605A would be a British engine, it would be probably rated as an 1530 BHP one - ie. output expressed at the peaking altitude, but PS converted to BHP (x0.986 IIRC); as a German engine, it was rated as 1475 PS at SL.

    It`s best to look at the engine output curves vs. altitude.
     
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