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Spade Grip Fire Button Drawings???

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  • Jag248rpa
    Rank 5 Registered User
    • Mar 2011
    • 140

    Spade Grip Fire Button Drawings???

    Does anyone have drawings for the fire button from a Dunlop spade grip? Mine was converted to an electric button for use in a Harvard and I'd like to convert it back to an operational pneumatic button.

    Thanks,

    Ron
    Last edited by Jag248rpa; 21st April 2015, 22:03.
  • QldSpitty
    Rank 5 Registered User
    • Apr 2006
    • 2628

    #2
    A round type button or later cannon rectangular type?
    http://www.shapeways.com/product/RH2...ionId=40484464
    "If the C.O. ask's you to be Tail End Charlie...just shoot him!!!....A Piece of Cake.
    http://spitfirea58-27.blogspot.com.au/

    Comment

    • Jag248rpa
      Rank 5 Registered User
      • Mar 2011
      • 140

      #3
      Its for my Hurricane grip so the round type button. Below is a picture showing the electrical wiring exiting the brass bass.

       photo 11960f_zpsycxosoql.jpg

      What I'm looking for are drawings to machine a new brass bass and attached brass tubing for the pneumatic system. So in the picture below, it's the item on the left for which I need a drawing.

       photo IMG_5808_zpsemqkaxng.jpg

      Comment

      • Creaking Door
        Rank 5 Registered User
        • Sep 2006
        • 9873

        #4
        There is a group that were at the Brenzett / Shoreham Aerojumbles that manufactures replica firing-buttons of this type. I don't remember if they were pneumatic or electric but presumably they must have drawings to manufacture these.

        Maybe somebody here can put you in touch with this group?
        WA$.

        Comment

        • Jag248rpa
          Rank 5 Registered User
          • Mar 2011
          • 140

          #5
          Does anyone know how to remove the firing button assembly from the spade grip?

          Comment

          • Creaking Door
            Rank 5 Registered User
            • Sep 2006
            • 9873

            #6
            It is probably a simple press-fit?

            Incidentally, forum member Tangmere1940, as long-time organiser of the Shoreham Aerojumble, will probably be able to put you in touch with the group producing replica spade-grips and firing-buttons...

            ...if his private-message in-box isn't full (as it usually is)!
            WA$.

            Comment

            • Jag248rpa
              Rank 5 Registered User
              • Mar 2011
              • 140

              #7
              I actually have a replica button assembly but oddly is too large to fit the spade grip. And I'd really like to use as many of the original parts as possible.

              Now that I've take the assembly apart it turns out that I require items 6, 9, and 10 to restore the assembly back to its original pneumatic system. I'm hoping someone has "spares" or drawings that I can use to make the replacement parts. Even photographs of these parts would be helpful.

              Many thanks everyone for your feedback.

              Cheers!

               photo Spade Grip AP-1641_zpssh6wohzo.jpg
              Last edited by Jag248rpa; 22nd April 2015, 18:30.

              Comment

              • Creaking Door
                Rank 5 Registered User
                • Sep 2006
                • 9873

                #8
                My hope was that the group producing the 'replica' firing-buttons had done so from original drawings and so the parts would be interchangeable with original parts (and they would have copies of the original drawings)...

                ...maybe they simply produced good 'looky-likey' firing-buttons?

                I suppose the danger with faithful replicas is somebody passing them off as originals.
                WA$.

                Comment

                • Jag248rpa
                  Rank 5 Registered User
                  • Mar 2011
                  • 140

                  #9
                  Update
                  I've been able to borrow and complete Hurricane Grip from another project team. And using the fire button assembly from that grip I've able to determine the dimensions I require with one exception. That dimension is the threads for the air valve that screws in to the valve body with the inlet pipes. Or even better, does anyone know the model number of the original air valve or a replacement valve?

                  I'm happy to share the drawings when I'm finished with the understanding that they are not for an airworthy project.

                  Thanks,

                  Ron

                  Comment

                  • HurriRV7
                    Rank 5 Registered User
                    • Jan 2007
                    • 248

                    #10
                    Originally posted by Jag248rpa View Post
                    Update
                    I've been able to borrow and complete Hurricane Grip from another project team.....
                    I'm happy to share the drawings when I'm finished with the understanding that they are not for an airworthy project......
                    Any chance of a picture?
                    Steven Smart

                    Hurricane aficionado, and Classical Guitar....

                    Comment

                    • Jag248rpa
                      Rank 5 Registered User
                      • Mar 2011
                      • 140

                      #11
                      Originally posted by HurriRV7 View Post
                      Any chance of a picture?
                      Of the borrowed grip or the grip that I'm restoring?

                      Comment

                      • QldSpitty
                        Rank 5 Registered User
                        • Apr 2006
                        • 2628

                        #12
                        The valve is a standard Schrader valve I believe.
                        "If the C.O. ask's you to be Tail End Charlie...just shoot him!!!....A Piece of Cake.
                        http://spitfirea58-27.blogspot.com.au/

                        Comment

                        • Jag248rpa
                          Rank 5 Registered User
                          • Mar 2011
                          • 140

                          #13
                          Below is a picture of the valve body with the valve in place. The head of the valve looks larger than any standard valve I've seen. Maybe the head is modified.

                           photo IMG_0836_zps00tvqr92.jpg
                          Last edited by Jag248rpa; 28th April 2015, 22:01.

                          Comment

                          • Jag248rpa
                            Rank 5 Registered User
                            • Mar 2011
                            • 140

                            #14
                            Anymore thoughts on the make and model of the valve now that I've posted a picture?

                            Thanks,

                            Ron

                            Comment

                            • cornovii
                              Rank 5 Registered User
                              • Jun 2012
                              • 146

                              #15
                              Originally posted by Jag248rpa View Post
                              Anymore thoughts on the make and model of the valve now that I've posted a picture?

                              Thanks,

                              Ron
                              Sorry I can't help with size or type but would it be possible for you to take the one in the photo out and measure it up?

                              Comment

                              • cornovii
                                Rank 5 Registered User
                                • Jun 2012
                                • 146

                                #16
                                Click image for larger version

Name:	BUTTON 1.jpg
Views:	1
Size:	335.2 KB
ID:	3661494

                                Hope this might help
                                Last edited by cornovii; 6th May 2015, 23:07. Reason: Added text

                                Comment

                                • Jag248rpa
                                  Rank 5 Registered User
                                  • Mar 2011
                                  • 140

                                  #17
                                  Originally posted by cornovii View Post
                                  Sorry I can't help with size or type but would it be possible for you to take the one in the photo out and measure it up?
                                  I tried but the valve won't budge.

                                  Comment

                                  • Jag248rpa
                                    Rank 5 Registered User
                                    • Mar 2011
                                    • 140

                                    #18
                                    Great picture, Cornovii! Thank you. What document is this page from?

                                    Comment

                                    • cornovii
                                      Rank 5 Registered User
                                      • Jun 2012
                                      • 146

                                      #19
                                      Click image for larger version

Name:	A Hulme 1.jpg
Views:	1
Size:	245.0 KB
ID:	3661512

                                      Goes under Air Ministry on here. He might have a copy to purchase.
                                      Last edited by cornovii; 7th May 2015, 13:14. Reason: Keep forgetting to add text

                                      Comment

                                      • Jag248rpa
                                        Rank 5 Registered User
                                        • Mar 2011
                                        • 140

                                        #20
                                        Thank you again

                                        Cheers

                                        Comment

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