Dive limits

Discussion in 'Aviation' started by tomo pauk, Mar 24, 2014.

  1. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Was thinking of making a dedicated thread for aircraft dive limits. Hopefully, we should have plenty of prime source data for many of the A/C of ww2. To start the ball rolling, here is data for the P-38, along with some other related stuff:

    38dive.JPG
    38dive2.JPG
    38dive3.JPG
     
  2. Juha

    Juha Well-Known Member

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  3. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Thanks. The idea is to post the excerpts from manuals and tests here.
     
  4. Aozora

    Aozora Well-Known Member

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    #4 Aozora, Mar 24, 2014
    Last edited: Mar 24, 2014
    P-51B/C/D Technical Orders:

    [​IMG]
    [​IMG]

    P-51D/K Flight Restrictions:

    [​IMG]
    [​IMG]
     
  5. Aozora

    Aozora Well-Known Member

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    From Westland Wyvern S4 Pilot's Notes -
    Weapons Release Limitations:
    [​IMG]

    Other Flight Limits:
    [​IMG]
     
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  6. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Thanks :)

    P-47N dive limits. That variant was without dive flaps, and still dived great, despite the 'old' S3 profile shared with granpa P-47B. And P-43??

    47nDive.JPG
     
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  7. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Dive limits for P-47D-25 through -35:

    47dDive.JPG
     
  8. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    Great stuff guys!!! I love to see actual FM data as opposed to what is written in "a book" by an author who probably never flew a plane or read a flight manual. You're gonna find the ability to bust many a myths by researching actual data.
     
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  9. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Thanks.
    Some other A/C: P-39L/M/Q, P-40 (later models) and Hurricane II/IV. Unfortunately, I don't have neatly listed altitude limits:

    39dive.JPG

    40dive.JPG

    hurriDive.JPG
     
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  10. tomo pauk

    tomo pauk Creator of Interesting Threads

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    #10 tomo pauk, Mar 25, 2014
    Last edited: Mar 25, 2014
    double post
     
  11. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Dive limits for the P-61. Unfortunately, the person that draw the diagram mixed up the 10000 and 20000 ft lines.

    widowDive.JPG
     
  12. OldSkeptic

    OldSkeptic Active Member

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    Love the P-61 one... its maximum dive speed was less than a Mossy XXX maximum level speed....
     
  13. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    Remember that's Indicated Air Speed - you'd have to calculate True Air Speed, even then it still might be slower.
     
  14. tomo pauk

    tomo pauk Creator of Interesting Threads

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    #14 tomo pauk, Mar 28, 2014
    Last edited: Mar 28, 2014
    This is from the picture from pots #1 of this thread:

    IasTas.JPG

    So the P-61 can dive at 10000 ft and under at 415 + 5x10 = 415 + 50 = 465 mph

    Keen eye might also see that the P-38 is at red line at 30000 ft when flying at 440 mph, and while at ~35000 ft when flying at 430 mph; seems like that expecting from the (X)P-38K to be topping 450 mph above 30000 ft might be a tad too much?
     
  15. tomo pauk

    tomo pauk Creator of Interesting Threads

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    #15 tomo pauk, Mar 31, 2014
    Last edited: Mar 31, 2014
    Dive tests found at Williams' site:
    Fw-190 (early model)
    Bf-109 (9.3 MB pdf, in German, but numbers should be self-explaining)

    ('Vw' = Wirkliche Geschwindlikheit = TAS; 'Va' should be IAS ; 'Machzahl = Mach number)

    Many thanks, Mike al :)

    added: dive limits for the Bf-109F - table - should have bearing on problems with wings of the Bf-109F
     
  16. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Dive limits for the Spitfire XIV/XIX:

    XIVdive.JPG
     
  17. tomo pauk

    tomo pauk Creator of Interesting Threads

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  18. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Air speed limits for the Sea Fury 10 and 11 - same limit would be for dive speeds?

    furyDive.JPG
     
  19. tomo pauk

    tomo pauk Creator of Interesting Threads

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    Dive limits for the Spitfire IX and XVI:

    9-16dive.JPG

    Speed limits for the Mosquito FB.VI:

    mossieLimits.JPG
     
  20. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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