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3D CAD- RAF Browning .303

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  • MikeHoulder
    Rank 5 Registered User
    • Dec 2009
    • 245

    3D CAD- RAF Browning .303

    A couple of years or so ago I drew up this gun.



    It now looks irritatingly primitive. I'd like to improve the drawing while I take a rest from the Lancaster itself.

    Here is the improvement of the flash suppressor:

    Old


    New


    But even with the new drawing the screw thread is a bit hit or miss. What would be the thread spec or a good approximation?

    And can anyone help me with photos or drawings to enhance the details of the rest of the gun and make my drawing more precise?
    Mike
  • m3bobby
    Rank 5 Registered User
    • Jun 2013
    • 26

    #2
    I can get you some in the morning.

    Comment

    • turretboy
      Rank 5 Registered User
      • Sep 2004
      • 564

      #3
      Nice work on the models.

      The front mounting bolt is used in FN turret mounts.

      Mike

      Comment

      • MerlinPete
        Rank 5 Registered User
        • Jan 2006
        • 1276

        #4
        Hi Mike

        The flash arrester thread is 1.062" x 20 tpi and is 0.708" long.
        There are also 13 off 0.90" wire locking holes close to the periphery of the flange in front of the thread.

        Pete
        Last edited by MerlinPete; 20th April 2014, 08:17.
        If I had a quid for every time someone mentioned "buried crated Merlins", I could buy one!

        www.flightengineering.co.uk

        Comment

        • Moggy C
          Moderator
          • Jan 2000
          • 20534

          #5
          As a matter of interest..

          One of the tiny details of the Bomber Command Memorial is the hook that one of the gunners has tucked into his flying boot.

          Does anyone have details of how this was used to clear stoppages? Was it just to draw back the breech? If so, where did it fit?

          Moggy
          "What you must remember" Flip said "is that nine-tenths of Cattermole's charm lies beneath the surface." Many agreed.

          Comment

          • snailer
            Rank 5 Registered User
            • Jan 2011
            • 24

            #6
            Hi,
            A film of it in use here:-
            http://www.youtube.com/watch?v=K5OMhR-Lm6s

            Pete
            Last edited by snailer; 20th April 2014, 16:35. Reason: mended link

            Comment

            • Moggy C
              Moderator
              • Jan 2000
              • 20534

              #7
              Brilliant.

              Thank you very much for that. Another small piece of knowledge gained

              Moggy
              "What you must remember" Flip said "is that nine-tenths of Cattermole's charm lies beneath the surface." Many agreed.

              Comment

              • MikeHoulder
                Rank 5 Registered User
                • Dec 2009
                • 245

                #8
                Turretboy, I'd love to see your Browning image. As you can see only the top part is displayed.

                Unfortunately Photobucket are using a bad algorithm (for our purposes) for reducing the size of images if their size exceeds 1024x768 pixels.

                It is possible to overcome this defect. Here are the instructions found if you follow this sequence of pages in the Photobucket Help system:
                Photobucket Help -> Sharing and Linking -> Linking Original Size Images (full resolution)

                where you will see the following which does do the job:

                To link out your full size images (images larger than 1024x768):
                1. Go to UPLOAD page
                2. Click on the gear wheel icon (top right of panel)
                3. Check the option to "Display my linked photos in their original sizes".
                4. Click Save

                This will append the ~original addition to your link codes, which allows them to be displayed in the full resolution they were uploaded as.

                Comment

                • m3bobby
                  Rank 5 Registered User
                  • Jun 2013
                  • 26

                  #9
                  Click image for larger version

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                  Comment

                  • MikeHoulder
                    Rank 5 Registered User
                    • Dec 2009
                    • 245

                    #10
                    Great stuff, many thanks all three of you, turretboy, MerlinPete and m3bobby
                    Mike

                    Comment

                    • turretboy
                      Rank 5 Registered User
                      • Sep 2004
                      • 564

                      #11
                      Hi Mike,

                      I found this one in my files.



                      I updated the link to original file option.



                      Regards,
                      Mike

                      Comment

                      • MikeHoulder
                        Rank 5 Registered User
                        • Dec 2009
                        • 245

                        #12
                        Mike, that is more than great. Many, many thanks. The plan and elevation are very desirable. Do you know the source? One thing has struck me. The outer barrel case is show as tapered to the front. Looking hard at one of the photos I have, I think I can see it now there as well. What a surprise!

                        Mike, do you happen to have the key to the part numbers shown. I struggle to find sensible names for the parts since I am completely clueless about guns.

                        Best wishes to all
                        Mike

                        Comment

                        • OneEighthBit
                          With wings alone
                          • Mar 2008
                          • 728

                          #13
                          Careful now. If the plod get a whiff you're making viable CAD models of a .303 browning they'll be round and accuse of you facilitating the manufacture of banned firearms.

                          After all, they figure anyone with a 3D printer has the potential to print a "gun" which is grounds enough for a raid. http://www.bbc.com/news/uk-england-manchester-24666591
                          "The best way to stop a crack in the fuselage spreading is to drill each end with a one eighth bit."
                          @HorsaJed | Jet Age Museum Horsa Cockpit Project

                          Comment

                          • Mr Merry
                            Rank 5 Registered User
                            • Jan 2013
                            • 919

                            #14
                            OneEightBit, it's a good job Mike is in Argentina in that case

                            Comment

                            • MikeHoulder
                              Rank 5 Registered User
                              • Dec 2009
                              • 245

                              #15
                              Wow! And if I 3D print the bomber itself .....?

                              Comment

                              • Walter 63
                                Rank 5 Registered User
                                • Dec 2008
                                • 104

                                #16
                                Mike, I've got a fair bit of reference material on the .303 Browning which I'll be happy to share with you if you can let me have your e-mail address.

                                And yes, as you remarked earlier on, the barrel casing is tapered, something which is neglected in quite a few replicas, for ease of manufacture no doubt. Also, Turretboy's drawing (hi Mike) shows the gun in its Mk I version with the early flash eliminator, I believe the Mk II version with the revised muzzle brake and flash eliminator is somewhat shorter overall. Attaching one of the many photos I took of a .303 years ago at the Brussels Army Museum, as a teaser .Click image for larger version

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                                Comment

                                • derekbu
                                  Rank 5 Registered User
                                  • Jan 2010
                                  • 36

                                  #17
                                  Nice work, Mike!
                                  I've also been modeling the Browning, for drawings to appear in my Wirraway book (Mk IIs were mounted under the wings of some Wirraways for training purposes).

                                  Here is a snapshot of my efforts so far:


                                  I'm also looking for reference material... particularly the underside of the gun... Walter, I'll send you a PM.

                                  Regards,
                                  Derek

                                  Comment

                                  • m3bobby
                                    Rank 5 Registered User
                                    • Jun 2013
                                    • 26

                                    #18
                                    The MkII has the early non finned booster and flash eliminator. The MkII* has the more usual finned versions. I think the Mk1 version is the Colt made ANM2.

                                    I've got a MkII rather than the MkII* but I have a MkII* booster and flash eliminator to fit as I can't find the correct MkII parts.

                                    Comment

                                    • m3bobby
                                      Rank 5 Registered User
                                      • Jun 2013
                                      • 26

                                      #19
                                      Originally posted by Walter 63 View Post
                                      Mike, I've got a fair bit of reference material on the .303 Browning which I'll be happy to share with you if you can let me have your e-mail address.

                                      And yes, as you remarked earlier on, the barrel casing is tapered, something which is neglected in quite a few replicas, for ease of manufacture no doubt. Also, Turretboy's drawing (hi Mike) shows the gun in its Mk I version with the early flash eliminator, I believe the Mk II version with the revised muzzle brake and flash eliminator is somewhat shorter overall. Attaching one of the many photos I took of a .303 years ago at the Brussels Army Museum, as a teaser .[ATTACH=CONFIG]227671[/ATTACH]
                                      I don't suppose I could have a copy of some of the info could I? I've been slowly restoring my example and trying to get the correct AP but it's slow going.

                                      Comment

                                      • Edgar Brooks
                                        Rank 5 Registered User
                                        • Apr 2009
                                        • 966

                                        #20
                                        Do you have a copy of the RAF Museum Series Volume 9 "British Aircraft Guns of World War Two?" It says, on the cover, that it contains "The Official Air Publications for the Lewis, Vickers and Browning machine-guns and the Hispano 20mm cannon." ISBN is 0-85368-292-5, 0-88254-495-0 in the U.S., with a Library of Congress Catalogue Card Number 79-89016. When the book was written, it stated that the quality of the type and illustrations was not good enough for book purposes, so they had to be reproduced. According to the book, the A.P., for the Mk.II, is 1641C.

                                        Comment

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