R-2600 + turbo: was that ever a viable thing?

Discussion in 'Aviation' started by tomo pauk, Jun 27, 2012.

  1. tomo pauk

    tomo pauk Creator of Interesting Threads

    Joined:
    Apr 3, 2008
    Messages:
    7,993
    Likes Received:
    438
    Trophy Points:
    83
    One of the rare major US engines that was never used in a turbocharged form (not counting prototype installations, like the one tried at A-20). Was the turbo R-2600 ever a viable possibility, or the engine 'defied' in some way against a turbo?
     
  2. Shortround6

    Shortround6 Well-Known Member

    Joined:
    Jun 29, 2009
    Messages:
    9,769
    Likes Received:
    800
    Trophy Points:
    113
    Occupation:
    retired Firefighter
    Location:
    Central Florida Highlands
    I don't know. I have seen a few comments about it but nothing to back them up. I don't know of any other tries except the A-20 ( doesn't mean that they didn't exist, just not well recorded?) Why they weren't used on the P-70 night fighter is a puzzle.
     
  3. rinkol

    rinkol Member

    Joined:
    Jan 6, 2009
    Messages:
    124
    Likes Received:
    7
    Trophy Points:
    18
    Possibly there were teething problems that could have been solved, but did not have sufficient priority. Most of the R-2600 applications did not make any special demands on high altitude performance and it would have made sense to concentrate on larger engines, specifically the R-2800 and R-3350; these had important applications where high altitude performance was critical e.g., P-47 and B-29.

    The early turbosupercharger installations did have some control and reliability issues; for example some installations were known to have problems with surging (the Hercules VIII seems to have been one such case).
     
  4. tomo pauk

    tomo pauk Creator of Interesting Threads

    Joined:
    Apr 3, 2008
    Messages:
    7,993
    Likes Received:
    438
    Trophy Points:
    83
    Thanks for the inputs :)

    Would it be right to conclude that there was nothing special that would hamper the R-2600 + turbo in a plane?
     
  5. Shortround6

    Shortround6 Well-Known Member

    Joined:
    Jun 29, 2009
    Messages:
    9,769
    Likes Received:
    800
    Trophy Points:
    113
    Occupation:
    retired Firefighter
    Location:
    Central Florida Highlands
    We don't really know, there are reports with no details that the A-20 with turbos had trouble. There was also a change in policy about what altitude the light/ medium bombers would operate at that meant they didn't need turbos.

    Turbos were planned for the 4 engine version of the Martin B-33 ( 400 planes ordered but all canceled before the prototype was even started)

    In theory there is nothing to prevent it but in practice things don't always work out. The Theory was that the turbo would hold the exhaust back pressure to the same value as a non-turbo plane at sea level. In practice the back pressure was always several lbs higher until well above the critical altitude. This MAY have caused problems with cooling the exhaust valve and exhaust port area of the cylinder head.
     
  6. gjs238

    gjs238 Well-Known Member

    Joined:
    Mar 26, 2009
    Messages:
    1,710
    Likes Received:
    107
    Trophy Points:
    63
    Gender:
    Male
    SR: Could you elaborate on this policy? Just curious. :)
     
Loading...

Share This Page