Why does the P-47D have two station 101.625's that are 8" apart?

Discussion in 'Aviation' started by rtwpsom2, Jun 28, 2014.

  1. rtwpsom2

    rtwpsom2 New Member

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    I was looking over some drawings for the P-47D and noticed that it has two Sta 101.625's 8 inches apart. Why did they do this? Does this mean the aft one is actually 109.625" from the front and that all the subsequent stations are actually 8 inches behind their station number?
     
  2. GregP

    GregP Well-Known Member

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    Could very easily be a typo. They happened a lot in the days before computers and easy backspace and editing.
     
  3. Elmas

    Elmas Active Member

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    And they happen today with the computers as well, Greg.....
     
  4. rtwpsom2

    rtwpsom2 New Member

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    In this case it's not a typo. They are two distinct fuselage stations quite clearly marked FWD and AFT and both have dimensions to them 8 inches apart.

    Sj74ydy.jpg
     
  5. drgondog

    drgondog Well-Known Member

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    looks like the aft bulkhead should be at Sta 109.625 (85. + 24.625)
     
  6. rtwpsom2

    rtwpsom2 New Member

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    There is already a station 109.625.
     
  7. drgondog

    drgondog Well-Known Member

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    as may be...but the dimensions shown above from 'STA 85' clearly mean that '101.625' and '109.625' are the correct ones..
     
  8. Clayton Magnet

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    I suspect there was a "plug" or fuselage extenstion added at some point in the design, and they didnt want to revise the whole drawings
     
  9. Shortround6

    Shortround6 Well-Known Member

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    You may be right, wasn't the fuselage extended 8in from the "B" to the "C" version?
     
  10. Clayton Magnet

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    I can't answer with any authority on that, but wikipedia says it was 13". I work on Bombardier CRJ900's for a living, and Bombardier added new station number blocks for every subsequent fuselage extension added, from the original 200's, through to the newer 1000's.
     
  11. Clayton Magnet

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    Sweet, I cracked 100 posts
     
  12. Conslaw

    Conslaw Member

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    Since nobody else asked it, I'm going to ask it: what's a Sta 101.625?
     
  13. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
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    Fuselage station - either 101.625 inches from the nose or a datum point.
     
  14. razor1uk

    razor1uk Well-Known Member

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    ..that design wise are more useful during creation building the jigs with their supporting jig structures that the aircraft eventually will be pieced together in/upon, if my hunch is correct, a practice borrowed from ship and train builders.
     
  15. rtwpsom2

    rtwpsom2 New Member

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    Thanks for the help guys, I really appreciate it. I think Clayton is right, it was just an effort to not have to replace the station numbers on thousands of drawings.
     
  16. drgondog

    drgondog Well-Known Member

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    If "C" references a note in the Effectivity Block, that is one way to address it but seems a little "off' relative to standard drafting practices.
     
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