LAST SHIPPING DATE FOR 2019 WILL BE THURSDAY 12TH DECEMBER.
SHIPPING WILL RESUME ON THE 6TH JANUARY 2020.

Starting my 25 Pdr... Mirbat Gun.

All topics related to Armortek's 25 Pdr
Robert Reid
Posts: 323
Joined: Mon Oct 09, 2017 9:49 pm
Has liked: 39 times
Been Liked: 120 times

Re: Starting my 25 Pdr... Mirbat Gun.

Post by Robert Reid » Sat Nov 02, 2019 10:14 pm

When we last left the project... we were getting ready to rivet the reinforcing brackets onto the shield... but the press for some reason would not expand the copper rivets. Still working on that... this press should crush them perfect.

This is a brake riveting press, BTW. Also for clutches. And I built my 1:1 Model T Armored car with it. 5,000 rivets...

Image

Using custom-made dollies for the 3/32nd (ish?) rivets on the front shield. I turned the dollies up from mild steel and they will double-end the rivets. The 25 pdr is kind of an experiment. The real test will come on the Rolls!

Image

Shield with rivets set on both ends. And markings for footman loops and other holes. A few of the 8BA bolts and nuts in place, instead of using cap screws.

Image

Other side of the shield showing rivets dollied on both sides. Some of the Armortek bits going on with 8BA bolts and nuts.

Image

Hubs, which took quite a bit of modifying, but I think because I made a mistake and put the Armorpax web pieces too far outboard. But the backing plates work great and the drums work with spacers and a bit of machining. I am going to revisit Dave Dibb's build tonite as I think I need to move some axle parts around before I put in my linkages, lever, etc.

Image

After much riveting, much tightening nuts, much soldering and a bunch of other work, a beautiful shield is starting to emerge! I machined the sight 'tube' so that it is now hollow with a removable cap. The footman loops are pressed in the holes and soldered from the back (small torch melts them into a perfect little rivet!) I decided to steal from a couple of amazing builds here and do some brass work, especially for the wood toolboxes, which I will probably build tomorrow. The Armorpax boxes are great, but I think I can make them 'complete' with hinges, lids and ironwork (brasswork?) to go in the brass cradles. The Armorpax boxes are perfect patterns, too!

Image

One of my brass projects... a cradle for the wood toolbox. Love the way it came out and it was super easy using brass strip and a small press/shear I got from eBay.

Image

Front of the shield with footman loops fitted. The factory shovel clips are going to get replaced with some brass ones I'll make tomorrow. It's a lovely piece!!!!

Image

Self-etch primer applied to the front... the rear tomorrow after a few more details go on. Seems a shame to paint over all these neat little details! But it's coming together nicely!

Image

And last... starting to mock up assembly. One can never really appreciate the scale of an Armortek kit until it starts to come together like this! Not just the scale, but the opportunity it has for detailing!

Image

A fun Saturday... when I should have been doing other things. But I needed a relaxing weekend!

Cheers,

RPR

Robert Reid
Posts: 323
Joined: Mon Oct 09, 2017 9:49 pm
Has liked: 39 times
Been Liked: 120 times

Re: Starting my 25 Pdr... Mirbat Gun.

Post by Robert Reid » Sun Nov 03, 2019 9:44 pm

Just three more from today... I had hoped to get more done, but I got kind of obsessed with brakes and the brake handle... wanted to make my wood tool boxes, too. But it turned out to be time for a nice Shiraz and some cheese!

I ended up modifying Dave Dibb's great parts (again... like with the limber) to add a few details to the white metal castings. And made another support tray for the wood tool boxes I intend to build.

Here you can see the modified lever and the linkages. Added some springs which looked great in Jeff and Marcus' builds. And some linkage-looking accessories. It turned out that I had messed up the brake backing plates initially (fortunately, they were only fitted with no adhesive) and so figured out my errors and got everything right thanks to the great pictures from the above mentioned builds and Armorpax. Forum is, again, invaluable!

Image

Here is a picture of the left (offside, in UK-speak) hub showing the linkages. I was a bit creative in the use of Dave's parts, but I think it looks the part and has some nice detail!

Image


This mainly shows the rack for carrying the wood box, with its handles. The brass work is really fun to do and very satisfying. A small shear/press and good solder and it takes no time. This took under 30 minutes from start to finish.

Image

That's all for this weekend... a lot done! Very fun. Next I have to start to get into the sighting mechanism and gearboxes. And the big sighting platform. I think that is going to be fun, and I am trying to figure out how to do degree marks without going blind. Thinking a scribe on my rotary table... But I have a lot of detail work to start pulling together before I start another big subassembly! Breech is high on that list. Lots of good ideas here!

Cheers,

RPR

Robert Reid
Posts: 323
Joined: Mon Oct 09, 2017 9:49 pm
Has liked: 39 times
Been Liked: 120 times

Re: Starting my 25 Pdr... Mirbat Gun.

Post by Robert Reid » Sun Nov 10, 2019 11:19 pm

I only got about 3 hours this weekend to work on kit... getting ready for winter, stacking wood, putting on studded snow tires, putting away tractors and mowing equipment....

But in that time, I got a good start on my two wood storage boxes. Which is really timely, because I think that Dave Dibb's tools will go very nicely in one of these boxes!

The Armortek kit boxes are nice and fill the role. And Dave's resin boxes are gorgeous and show all the right detail. But I wanted wood boxes that open and close and store tools and kit. So I made them from scratch.

Image

In front are my two boxes that will fit in the brass racks. In back are the kit box from Armortek and the Resin box from Armorpax. Both great... but I wanted to go further.

Image

Here is a close-up of one. The nails in the brass are made from brass wire, 1/16th pounded in the wood and then ground to look like a nail head. The rivets on the brass strapping are nails. I have to come up with hinges and latches. I'd rather buy than make. But can do either. Also, rope handles will be fitted using model sailboat rigging line, which is really good scale rope!

That's all for this weekend.. not much. But fun!

Cheers,

RPR

Robert Reid
Posts: 323
Joined: Mon Oct 09, 2017 9:49 pm
Has liked: 39 times
Been Liked: 120 times

Re: Starting my 25 Pdr... Mirbat Gun.

Post by Robert Reid » Sat Nov 16, 2019 9:38 pm

Waiting for some hinges to come in for the boxes... so moved to some engraving and plates and my Clinometers.

Started the breech, too. I should have that done tomorrow. Damn, that is complicated!

Image

Original clinometer with the pair I made. Engraved... they actually look better in person. The close-up shows all the warts! And still need to add a glass or lucite 'rod' for the bubble level. But the housing is there.

Image

Close-up, which shows that the engraving, under high magnification, looks pretty crude. But it is pretty good to see!

Image

As I am building the Mirbat Gun, here is the plaque that was affixed to the shield which showed that the Sultan gave it to Woolrich in 1978. It is on the gun. I also learned that about the only 'remaining' part of the gun was the barrel. Most of the rest was destroyed/scavanged. So the gun is not exactly 'as used' since everything but the barrel was basically replaced. George Washington's Axe? Head replaced twice and handle replaced three times. But it was George Washington's Axe!

Image

And stealing from Jeff's beautiful build.... here are some additional engravings. Done with a 'trophy' engraver and freehanding on a printout of a GR crest. I had not tried using that machine freehand... and it works quite brilliantly! Thanks for the tip, Jeff! And the inspiration!

Cheers,

RPR

simon_manning
Posts: 1511
Joined: Fri Nov 02, 2007 8:51 pm
Location: new forest,hampshire,u.k.
Been Liked: 140 times

Re: Starting my 25 Pdr... Mirbat Gun.

Post by simon_manning » Sat Nov 16, 2019 10:24 pm

Another superb 25 pdr Robert, interesting to follow and great detail, regards simon manning.

Robert Reid
Posts: 323
Joined: Mon Oct 09, 2017 9:49 pm
Has liked: 39 times
Been Liked: 120 times

Re: Starting my 25 Pdr... Mirbat Gun.

Post by Robert Reid » Sat Nov 23, 2019 10:02 pm

I get one more weekend (and Thanksgiving Day) to work before heading off to deer camp for a few days. So trying to make it count!

Last weekend, I got a lot of small breech parts done. This weekend, I got most of the breech assembled and working. With much credit due to some great other builds here on the forum!

Still some pieces to add, but most of it is in place. Mostly some fasteners. The breech lever/lock works perfectly and came out better than I had hoped. It was a bit of a daunting filing/milling/soldering project... but the main thing was getting the design right. And it came out great! Breech itself was finally lapped in and is smooth as glass, even without oil (which I'll add after I glue on some aluminum or brass plates to cover the coutersunk Allen screws.

Image

Side view showing the breech lever and latch. Infernally complex little bit of machining and filing... and design! But the paddle unlocks the latch and the stop keeps the lever from going too far and the whole thing opens with just perfect perfection and smoothness!

Image

Breech open showing the chamber that takes my 24-ga shotgun shells (brass hulls only) that simulate the 25 pdr almost perfectly. This one is not going to fire, even blanks. It may be going back to UK when it's done, so it has to stay totally static.

Image

Side view with the breech open. I kept the original armortek breech actuating cam/pall and added the new lever and stops. The geometry on this is actually somewhat challenging! But ended up right on!

Image

Decided to make a 'moving' version of one of Armorpax parts, which is the side lever that mounts on the left side of the breech. Dave's part is great, but I wanted it to move. So decided to make my own version from German SIlver sheet and brass. Once complete, the lever will move like the original.

Image

More tomorrow, but the 'gun' is almost finished. Carriage needs a lot of work still and, of course, still have to do all the sighting and elevation/screw work!

Thanks for all the inspiration and kind words, guys!

Cheers,

RPR

Robert Reid
Posts: 323
Joined: Mon Oct 09, 2017 9:49 pm
Has liked: 39 times
Been Liked: 120 times

Re: Starting my 25 Pdr... Mirbat Gun.

Post by Robert Reid » Sun Nov 24, 2019 10:11 pm

I should get in a good day Thursday, then likely on hiatus until almost Christmas... But we'll see!

Here is the finished breech assembled on the barrel. The 'gun' mechanism is just about done. Except for the recoil levers off the left side of the carrier. That's going to go along with the sighting trunnion/yoke.

Image

Left side with the cocking? lever fitted Not sure what this lever does, actually. Assume it is cocking or ejecting the spent shell. In any case... it works and the actuating rod slides perfectly through its eye. So my buffered recoil works really well! Lots of little parts on all this!

Image

Closed breech showing the top view. Getting the breech to drop smoothly is real work!!! Lapping, filing, using sharpie to mark high spots. Not helped by 'aluminum on aluminum' is the worst possible thing when it comes to smooth operation! But once lapped and put together with lithium grease, it is just as smooth as can be!

Image

The .004" brass shim is perfect to cover the cap screws (which need additional countersinking.... check the lengths while pre-fitting). After putting the cap screws in, I plugged in aluminum plugs, but they still were not perfect. So I used the shim brass. This is perfect to cut with scissors, but it is rigid enough that it won't crumple.

Image

Breech finished and open. Earlier I mentioned using a 24 gauge brass shotshell for a cartridge. In fact, it is a 28 gauge. Made by a company called MagTech. Now can set the gun assembly aside and finish the carriage and the sighting mechanisms. Oh and the wood boxes. Those are coming out great!

Image

Have a great week everyone! See you, perhaps, on Thursday when we do some pre-turkey Armortek work!

Cheers,

RPR

Post Reply