R-2800-34 vs. 34w

Discussion in 'Engines' started by Zegera, Jun 9, 2014.

  1. Zegera

    Zegera New Member

    Joined:
    Jun 6, 2014
    Messages:
    5
    Likes Received:
    0
    Trophy Points:
    1
    #1 Zegera, Jun 9, 2014
    Last edited: Jun 9, 2014
    There are conflicting reports of 34w's HP; some state it to be 2100 HP military, some 2400 HP.

    Does anyone have the official spec sheets for these engines?

    How much MIL. HP does a plain 34 produce?

    What's the main difference between 34W and 34?
     
  2. Shortround6

    Shortround6 Well-Known Member

    Joined:
    Jun 29, 2009
    Messages:
    9,117
    Likes Received:
    555
    Trophy Points:
    113
    Occupation:
    retired Firefighter
    Location:
    Connecticut
    According to P W it was 2100hp military rating.

    But P W didn't publish/put out WER ratings or ratings using water injection/ADI for this engine.

    According to at least one Navy chart/spec sheet the combat rating was 2400hp at 1000ft and the Military rating was 2100hp at 3200-3400ft.

    The engine could make 2100hp using 100/130 fuel but needed either 115/145 or water injection to make the combat rating.
     
    • Like Like x 1
  3. tomo pauk

    tomo pauk Creator of Interesting Threads

    Joined:
    Apr 3, 2008
    Messages:
    7,826
    Likes Received:
    389
    Trophy Points:
    83
    • Like Like x 1
  4. Zegera

    Zegera New Member

    Joined:
    Jun 6, 2014
    Messages:
    5
    Likes Received:
    0
    Trophy Points:
    1
    #4 Zegera, Jun 9, 2014
    Last edited: Jun 9, 2014
    Very interesting. Military power; even though 30W starts at about 2210 HP and 34W at 2300 HP, 30W seems to hold power much better than the 34W; if I'm interpreting the charts correctly, that is.

    Also, if the only difference between 34 and 34W is the ADI, then I suppose their non-WER charts would be identical, correct?
     
  5. Shortround6

    Shortround6 Well-Known Member

    Joined:
    Jun 29, 2009
    Messages:
    9,117
    Likes Received:
    555
    Trophy Points:
    113
    Occupation:
    retired Firefighter
    Location:
    Connecticut
    The -30 is a whole new engine and supercharger, it did keep the same bore and stroke as the -34 though :)

    The -30 was an "E" series engine and it used a hydraulic coupling (DB 600 series style) to drive the supercharger and the supercharger was a different model than the one used on the -34.

    It is confusing but the dash numbers do NOT go in chronological order. the -34 is a development of the -22 engine.

    There were only two "E" series engines, the -32 used in the F4U-5 Corsairs and the -34 used in a variety of aircraft including the F8F-2 Bearcats. Some planes used water injection and some didn't.

    High and low blower refer to the supercharger gears not stages. The variable speed drive on the -30 engine is responsible for the curved/wavy lines on the chart. Engines with fixed gear ratios have straight lines on the charts.
     
    • Like Like x 1
  6. Algernon

    Algernon New Member

    Joined:
    Jun 28, 2010
    Messages:
    12
    Likes Received:
    4
    Trophy Points:
    3
    R-2800-34 used on F8F-1, R-2800-30 (Series E) used on F8F-2?
     
    • Like Like x 1
  7. Shortround6

    Shortround6 Well-Known Member

    Joined:
    Jun 29, 2009
    Messages:
    9,117
    Likes Received:
    555
    Trophy Points:
    113
    Occupation:
    retired Firefighter
    Location:
    Connecticut
    :oops: You are right.
     
Loading...

Share This Page