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Jeffs 25 pounder

Posted: Mon Jul 16, 2018 8:15 pm
by Jeffrey Goff
I needed a project that did not weigh hundreds of kilos, and not take up too much room and did not break the bank.
I have been working on it for about a week, I wanted it to be able to fire 9mm blanks (box of blanks left over from the 88) so to stay within the law I had to make some safety modifications, a new receiver fitted to breech block and into barrel with a 4 mm hardened steel pin located through barrel and receiver, allowing only room for the blank, and stopping any projectile,
also you can not vent from the front of the barrel, so I had to block the muzzle brake just forward of the first holes so it vents sideways, the muzzle break was also modified, (as this was to have been loctited into the barrel), the end of the barrel and brakewere tapped and a bronze bush screwed in and pined, this will stop the muzzle brake becoming a projectile, now that the main barrel assembly conforms to the law I started making a new breech lever with working spring catch, and the falling block fitted with firing pin, this is actuated by a prototypical side lever, pictures so far
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regards Jeff

Re: Jeffs 25 pounder

Posted: Mon Jul 16, 2018 9:17 pm
by Adrian Harris
This should be interesting :-)

Frightening in fact, when you think how small all these parts actually are :shock:

Adrian.

Re: Jeffs 25 pounder

Posted: Mon Jul 16, 2018 10:03 pm
by Robert Reid
Very nicely done!

Any chance you might have some drawings? That looks like a very worthy conversion!

Cheers,

RPR

Re: Jeffs 25 pounder

Posted: Sat Jul 21, 2018 4:49 pm
by Jeffrey Goff
next job I tackled was fixing the buffer to the recuperator slide, on the kit it is joined through the sides with countersunk bolts while full size uses four front facing eye bolts secured with nuts, I did this by brazing steel bar to the four corners on front of the recuperator slide, these were then slotted and drilled to take the eye bolts, I also reduced the length of the slide just past the side holes, recoil springs were added to the recuperator, this is the result so far
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regards Jeff

Re: Jeffs 25 pounder

Posted: Sat Jul 21, 2018 4:58 pm
by Robert E Morey
Jeff
That will be awesome with the blank firing and recoil! From a liability standpoint you may be reluctant to share the blank firing design - I'd like to see how you do it too! That is really neat. I'm sure it will be a mini masterpiece like all your builds.
Bob

Re: Jeffs 25 pounder

Posted: Sat Jul 21, 2018 5:51 pm
by Marcus Kwa
You got my attention!!! Will be watching this closely.
Really like your breech lever!

Marcus

Re: Jeffs 25 pounder

Posted: Sun Jul 22, 2018 11:25 am
by Jeffrey Goff
Thanks for the feedback guys, Marcus you have some outstanding details on your build I hope I can incorporate some
Regards Jeff

Re: Jeffs 25 pounder

Posted: Mon Jul 30, 2018 7:57 pm
by Jeffrey Goff
it has been just over a week since an update on the build, I assembled the 25 pounder to get an overall view, and what could be done to improve it, then took it apart again, I thought I would start with the wheels and axles, I made the brake drums, these will bolt to a plate fixed to the axle, also got rid of the dummy bolt for the wheel hub, and replaced it with an 8mm threaded stud and bolt, this is how far I got today
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regards Jeff

Re: Jeffs 25 pounder

Posted: Mon Jul 30, 2018 8:04 pm
by simon_manning
there's us on here just coasting along, then you hit us with this level of expertise, you hav'nt lost your touch, lovely details jeff, regards simon.

Re: Jeffs 25 pounder

Posted: Tue Jul 31, 2018 9:02 am
by Jeffrey Goff
Thanks Simon, I am going to enjoy working on this kit
Regards Jeff

Re: Jeffs 25 pounder

Posted: Wed Aug 01, 2018 7:22 am
by Marcus Kwa
Those brake drums are beautiful! It is almost a crime to cover them with paint......
Might give it a shot after I have finished the sighting system.

Marcus

Re: Jeffs 25 pounder

Posted: Wed Aug 01, 2018 6:59 pm
by Jeffrey Goff
Thanks Marcus, it was your brake details that inspired me
Regards Jeff

Re: Jeffs 25 pounder

Posted: Sun Aug 12, 2018 6:45 pm
by Jeffrey Goff
completed the hand brake and linkages, many small parts but worth the effort
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regards Jeff

Re: Jeffs 25 pounder

Posted: Sun Aug 12, 2018 9:19 pm
by Phil Woollard
That's quality work JG.

Re: Jeffs 25 pounder

Posted: Sun Aug 12, 2018 10:13 pm
by Robert E Morey
Beautiful brake drums and linkages. Fantastic!
Bob