I love it, gives me some more ideas on my miniature scale versions of a Tiger with 25mm barrel, the 30mm barrel has a defect inside the barrel. But a 20mm would be perfect in scale to a Panther 75mm barrel or scaled down Pak 40. I have aluminum molds sprockets and wheels are zero turn spindle assemblies
I've been looking around for plans to build a working non firing version of a Cannon for my nephew I took him to a military museum where they fired blank's and he loved it I have 6 deprimed 20x102mm casings with the blue practice rounds permanently attached to the cassings them selves. I was wondering if there are plans for this cannon that has no firing mechanism but the breach can still be operated. Any information would be great full.
I think it's the swaging of the 20mm to 50cal primer pocket allows the primer to shift forward slightly. I'll figure it out. Yup, when I get back to it, I have a section of rail to mount a sight on top of it. Eventually it will have an offset scope like the ww2 M3 antitank cannon.
drew abegglen Yup, you can buy the breeches from Pioneer Weapons out of AZ. Let me know if you can't find Mike's # on the web. You simply have the barrel threaded for the breech. It takes a big lathe, but any good shop with the right size lathe can do it.
Yup, regular 50cal tripod with a re-valved offroad nitrogen charged truck shock buffer. When I get time to get back around to it I'll make it more eloquent.
+jestertoo I found a couple of new (old stock) 20mm vulcan barrels for sale for about $800. First thought was to make one of these. Do they need a DD stamp? Would i be able to build it on a form 1 or do i have to find a SOT to build it for me or is a stamp not required because it is a breech loading cannon?
The barrel is a regular M61 vulcan barrel. I'm not sure what steel PWS used to make the breech. Yes I load my own rounds, 500+grns of WC867/872 under the TP or TPT projectiles. Cases are swaged to use 50bmg primers.
@@jestertoo you should use Anzio primer bushings for 50cal bmg primers or you can take a 32 acp pistol case cut to .240'' with a pipe cutter loaded with small rifle primer w/ 5/16 rod stuck into the case to hold while cutting it to length and then spun to turn down the case rim, then loaded with black powder and a gluded on overshot card made from a 5/16 hole punch then the loaded cut turned case is swaged into the Vulcan primer pocket =home made priming system!
Jess Johnson Yes, that is my understanding. Some time last year from what i heard. Ive yet to call Thunderbird Cartridge Co. and confirm. Always a weird call to make.
@@jestertoo its a a method of priming a howitzer. A priming lever rotates a firing mechanism in places and then disconnects to lock it in place. The disconnect lanyard is then pulled to disengage a lever held away from the primer under spring tension, allowing that lever to forcefully punch the firing pin into the primer, igniting the charge and firing the round out of the tube
@@ButtcheekOnaStick oh, I understand what you mean now. This is a cam-over hammer design. I do intend to build a squeeze linear disconnector to prevent the lanyard from affecting the aim, but the hammer firing mechanism is working well now.
@@jestertoo it is still a well built design, but I would make a few changes. If you can, make a self ejecting falling block. Use the US WW2 57MM AT as an example. Just makes ya coom when it fires lol. Next I would add a trigger instead of a lanyard, my example earlier was just that, a slightly better example than your mech. Its 20mm so a trigger, even a button like a pak36 or pak40 would do and accuracy would be fine, and finally I would allow recoil compensation. Hydropneumatic would be most efficient, but simple pneumatic or buffer spring would work just fine with a 20mm. Keep up the good work friend!
@@ButtcheekOnaStick There is already a Fox Offroad nitrogen charged shock inside the mechanism. It has been tweaked a lot since this video. You can see more of the changes in later videos. A self ejecting action on the falling block would be nice for sure, but outside of my abilities at this time. It might happen. A squeeze trigger instead of the lanyard I am working on.
A FIRING PIN TRAVEL LIMITER WOULD FIX ALL THE DRY FIRING... YOU ARE PULLING THE TRIGGER AWAY TOO FAST BEFORE THE FIRING PIN CAN COMPLETE ITS TRAVEL ARC AND STRIKE THE BULLET. LIMIT THE ARC TRAVELAND THE FIRING PIN CAN DO ITS JOB