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Thread: Guessing Game Mk III : What Engineering Marvel is this.?

  1. #221
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    Quote Originally Posted by p38arover View Post
    Many people complain about Whitworth nuts/bolts/threads but they just don't realise the impact they had on engineering. His name should be celebrated, not scorned.

    Oh, if , for the original Whitworth spanner sizes, you wonder about the relationship between the spanner size (specified size equals the bolt diameter) and the across flats sizing, it's mathematical. It's (square root 3) * diameter, i.e., 1.732*diameter - all due to the hexagon nut or bolt head. The length of the hex flat = the bolt diameter so the across flats = 1.732* diameter.

    Attachment 125223
    Due to 2nd World War economies the spanner sizes were changed to save metal, hence a 7/16" Whit spanner now fits a 1/2" Whit nut/bolt.

  2. #222
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    Quote Originally Posted by Fifth Columnist View Post
    Due to 2nd World War economies the spanner sizes were changed to save metal, hence a 7/16" Whit spanner now fits a 1/2" Whit nut/bolt.
    Wasn't just economies. The whole Lend/Lease thing had a hand in it.
    ​JayTee

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  3. #223
    p38arover's Avatar
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    That's why I said original Whitworth.
    Ron B.
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  4. #224
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    Quote Originally Posted by scanfor View Post
    Foley catheter?

    So, what have you got for us scanfor?
    1995 Mercedes 1222A 4x4
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    'When there's smoke, there's plenty of poke!!'
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  5. #225
    scanfor Guest

    OK try this one


  6. #226
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    Boo-yah.
    Nixie tube.
    -Mitch
    'El Burro' 2012 Defender 90.

  7. #227
    scanfor Guest
    Too bloody easy! All yours Toxic

  8. #228
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    Jolly good.
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    Have you been spying on Gav, Mitch?
    Your picture looks like some sort of gas vessel.
    If you don't like trucks, stop buying stuff.
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  10. #230
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    Quote Originally Posted by Toxic_Avenger View Post
    Boo-yah.
    Nixie tube.
    I have several boxes of them in the workshop. My daughter wants me to use them to make a digital clock for her.
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



    RIP Bucko - Riding on Forever

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