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

  1. 30th June 2017, 08:09 PM #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.
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  2. 30th June 2017, 09:10 PM #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.
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  3. 30th June 2017, 10:00 PM #223
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    That's why I said original Whitworth.
    Ron B.
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  4. 30th June 2017, 10:01 PM #224
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    Quote Originally Posted by scanfor View Post
    Foley catheter?

    So, what have you got for us scanfor?
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  5. 30th June 2017, 10:16 PM #225
    scanfor Guest

    OK try this one

    Untitled.jpg
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  6. 30th June 2017, 10:21 PM #226
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    Boo-yah.
    Nixie tube.
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  7. 30th June 2017, 10:22 PM #227
    scanfor Guest
    Too bloody easy! All yours Toxic
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  8. 30th June 2017, 11:10 PM #228
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    Jolly good.
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  9. 1st July 2017, 06:39 AM #229
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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. 1st July 2017, 07:29 AM #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.
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