Peter Rust Rusty Pete Show full post »
Ruffnut Thorston
Too right about easy start....

Someone I know had a piston  in a small diesel engine blown apart from that...

When it was removed, it fell apart, only the rings and cylinder bore had held it together in the engine!

It's not very good for people either! 😲
Best wishes,

Ruff...
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Peter Rust Rusty Pete
No, l agree,
But...........?
👹 Gladiator ? 👹😝
More than one way to skin a cat ðŸ˜‰
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Julian
No, l agree,
But...........?
👹 Gladiator ? 👹😝

It's ok Pete, there is only 15mm of barrel in the model, [the rest being solid] so application of instanter boom would only splay a very short measure, looking rather like a giant Sunflower. - well, with a bit of paint  What wonderful camouflage and propaganda, not only a plant to hide the real gun, but a total insult to the Boche regime, because their Sunflowers are totally inadequate. 

Anyway, to more serious matters, rest up, get well soon and easy on the EZ Start.....

J
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Peter Rust Rusty Pete
Cheers J.
How about my new gun?
Boche Gladiator?
17.2" bore, full-length bore from breech to muzzle
Bore scales to 0.22"
Barrel assembly resin-cast around a steel tube.
Action via muzzle-loading
Propulsion via compressed gas.
Elevation as modelled, but with mods to enable " howitzer trajectory" as well
Gas igniter via cdu under muzzle's mouth for a flash as the gas exhausts.
Ammo
Ball-bearings,  DCCconcepts ballast shot (Ahjay, only joking on that - grape-shot? Too much cleaning up afterwards), pellets.
0.22 darts would probably best, the trouble with that would be catching the neighbour's cat, so fill a drinking straw with water, freeze it and use a slug of ice as the round.
It's perfect. Who would suspect a puddle of water to have caused Vmax of their cat?
👹
Only joking
🤔🙄😳
Engineers do not have problems, merely solutions waiting to be used.
More than one way to skin a cat ðŸ˜‰
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Julian
Cheers J.
How about my new gun?
Boche Gladiator?
17.2" bore, full-length bore from breech to muzzle
Bore scales to 0.22"
Barrel assembly resin-cast around a steel tube.
Action via muzzle-loading
Propulsion via compressed gas.
Elevation as modelled, but with mods to enable " howitzer trajectory" as well
Gas igniter via cdu under muzzle's mouth for a flash as the gas exhausts.
Ammo
Ball-bearings,  DCCconcepts ballast shot (Ahjay, only joking on that - grape-shot? Too much cleaning up afterwards), pellets.
0.22 darts would probably best, the trouble with that would be catching the neighbour's cat, so fill a drinking straw with water, freeze it and use a slug of ice as the round.
It's perfect. Who would suspect a puddle of water to have caused Vmax of their cat?
👹
Only joking
🤔🙄😳
Engineers do not have problems, merely solutions waiting to be used.

Now, that's more like it.  Much pleasure at observing your health has improved considerably.  ðŸ˜‹

Brandy and complete recovery soon, I hope.

All the best

J
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AHJAY
All things can be finessed...

Ignition via spark generated via a reversed 230v transformer (240v becomes 4.6kv) - then add more for about 32kv via a jacobs latter of tantalum or similar capacitors and high voltage diodes. (do not forget the current limiting resstors... we want a high voltage spark, not an electric chair)

<< The circuit is out there if you wish, but be careful as it bites like a bad static shock. I have built it and it works (and I have tasted its bite too)... usual cautions & disclaimers for those who wish to follow the same path >>

Nice touch - Only the igniter wire ends need to be in the breech.... Which of course will need to be milled out of metal :-) :-)

Use camping gas as propellant and the flame will happen anyway. Add a smear of baby oil or Vape oil to the breech area before loading to add lots of smoke on ignition...

Get to 30kv with the Jacobs ladder circuit and between shots you will have the basis for a good static grass applicatortor too LOL

regards, Ahjay
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Peter Rust Rusty Pete
AHJAY wrote:
All things can be finessed...

Ignition via spark generated via a reversed 230v transformer (240v becomes 4.6kv) - then add more for about 32kv via a jacobs latter of tantalum or similar capacitors and high voltage diodes. (do not forget the current limiting resstors... we want a high voltage spark, not an electric chair)

<< The circuit is out there if you wish, but be careful as it bites like a bad static shock. I have built it and it works (and I have tasted its bite too)... usual cautions & disclaimers for those who wish to follow the same path >>

Nice touch - Only the igniter wire ends need to be in the breech.... Which of course will need to be milled out of metal :-) :-)

Use camping gas as propellant and the flame will happen anyway. Add a smear of baby oil or Vape oil to the breech area before loading to add lots of smoke on ignition...

Get to 30kv with the Jacobs ladder circuit and between shots you will have the basis for a good static grass applicatortor too LOL

regards, Ahjay


👍👍

Was thinking of a steel tube with a tufnol bung through which ran the 2 electrodes as the breech end, not certain whether to make it open, on hinges as the original,
However, the idea of the igniter being at the muzzle end, acoustically l was hoping for a resonance as the flame propagated towards the breech. Igniting at the breech may not have sufficient oxygen burn.
Let's  face it, it's  a V1 missile motor in principle, but without oxygen to burn with the gas. Maybe a small port in the breech for effect at that end.
Most powder cannon have oxygen-rich fuel to overcome the issue of a stoichiometric fuel  mix.
😈We shall see 😈
More than one way to skin a cat ðŸ˜‰
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AHJAY
Its a very tiny amount of gas... so will ignite fine. How will igniting in front of the "shell" propel it?

Ahjay
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Julian
Like the scale barrel bore, scaled to take 0.22 airgun pellets, ready made.  I don't know if you can still get them, but there used to be 0.22 feathered darts, which could be fired from an airgun, they may still be available and would be more accurate than pellets {unless you are going to try rifling the barrel}..

Getting sufficient O2 in the breech was achieved in the Mess Mortar by a thin strip of Bodge Tape across the divide between the 2 tennis ball tubes, leaving the inserted missile {tennis ball} in the muzzle tube and air + fuel in the rear, breech tube.  It could easily be replicated by passing a thin pin through the diameter of the barrel, somewhere 1/3 of the way from the breech base.  Given the volume of air in the breech tube, using camp stove or lighter gas fuel, the burn is pretty complete each firing, with a pleasing bang, too.

If you are stepping into the area of a hinging breech block, you will need a strong block lock.  Perhaps a set of circular cut thread steps with a channel cut across them, so the breech lock can be slid into the breech along the channel and rotated so the steps lock it in.  Perhaps easier to have a simpler sliding block, which runs across the breech end, in a {strong} channel, or keep the muzzle loading.

Can you remember where the ice bullets idea was muted, Agatha Christie?? Sherlock Holmes??…..

J
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Peter Rust Rusty Pete
Used them for years, started with ice cubes and a catapult 9cats or dogs in those days, then migrated to the plastic straw mould in the 80s.
Never read  Holmes, Pie-rot or Marple, so............
Breech lock?
Simples, adjust barrel pivot, so that the higher the barrel, the higher thclamping force, a bit like a snail cam principle. Also allows for faster reloads.
Darts? Any colour 0.22 10 for 4.33 👀
Shot thousands of rounds in my time, still got my eye in, too.
Best was .303 on open ranges though, using my issued Canadian Ross in the Cadets.
The size of the barrel had been considered for a rifle-cut, and is feasible, but is it necessary for indoors (apart from sorties into the garden for the sch.....you know what).
A friend of mine was a machinist at Sheffield Forgemasters and you know what they did!!!
He's already up-to-speed with the project ...............
We are planning a light machining workshop,  similar to BB Richard's.
More than one way to skin a cat ðŸ˜‰
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Peter Rust Rusty Pete
Idle hands..?...................!....?...??..
Now to flee-by 4 a  lathe, Miller, plasma cutter, pillar drill, 3-d printer scanner?...............................
😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈😈
More than one way to skin a cat ðŸ˜‰
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Julian
Friend of mine bought a musket ball mould, about 60 years ago and decided that he would make a suitable cannon, for them.  His dad didn't work at Forgemasters, but was an engineer for a steel construction firm, so a suitable bore 9/10 in length of tube was welded up at one end, and a touch-hole drilled.  He made his own gunpowder {A dangerous task in a kitchen - which eventually caused him to loose most of the skin on his face} and fuses.  The fuse worked, but spluttered and burned at differing rates, so wasn't particularly effective at timing, so after proving it would work Jetex fuse was used instead.  It was very effective mounted on a heavy block of wood and we found that it would penetrate the wooden planking in a building about 100yds away.  {Ooops!!}  It hadn't been aimed at the building, we just didn't think it would go that far, let alone go through it.

I do agree about rifling, for the particular purpose{s}, a lot of effort for that.  The sliding breech block is quicker than lowering and raising the barrel off a cam and you keep the same aiming point, with less stress on the trunnions, but again for the purpose{s} you propose the trouble and expense probably not worth it.

Have fun

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Jaz Avalley JazAvalley
I always say real lemon juice from a lemon not a bottle, honey - pay the extra and get local honey from a small brand so you get the pollen and it helps with asthma (it must be local, and the market stuff is heavily filtered and the goodness nicked, and often is not uk not eu and if chinese then expect pesticides and lots of it!) and alcohol of your choice. You can do without the alcohol, but some people are sure the alcohol has a positive input, even if it is only to help you sleep. 🙂 Whiskey or brandy is popular, and although you can use a decent malt or star frankly the lemon and honey likely cloud the flavour so cheapies do not make a lot of difference.

Jaz Avalley

Model Railway Discussion Group

https://www.facebook.com/groups/495282280644117/
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Jaz Avalley JazAvalley

Used them for years, started with ice cubes and a catapult 9cats or dogs in those days, then migrated to the plastic straw mould in the 80s.
Never read  Holmes, Pie-rot or Marple, so............
Breech lock?
Simples, adjust barrel pivot, so that the higher the barrel, the higher thclamping force, a bit like a snail cam principle. Also allows for faster reloads.
Darts? Any colour 0.22 10 for 4.33 👀
Shot thousands of rounds in my time, still got my eye in, too.
Best was .303 on open ranges though, using my issued Canadian Ross in the Cadets.
The size of the barrel had been considered for a rifle-cut, and is feasible, but is it necessary for indoors (apart from sorties into the garden for the sch.....you know what).
A friend of mine was a machinist at Sheffield Forgemasters and you know what they did!!!
He's already up-to-speed with the project ...............
We are planning a light machining workshop,  similar to BB Richard's.

Ruger 1022 does a nice 110 magazine/drum...I kid you not reminds one of a Tommy, apparently has a tendency to jam (what a surprise 😃), and as .22 is still legal as a semi.....plinking can be so muuuuch fun.And for a bout 20quid less than a take away 😃 The US guys put it in a pistol chassis 😈 and add the drum (110 mag)😈😈😈 not so smarty looking with a coat hanger attached to the end though UK legal...sighs.

Sorry for continuing off topic, but honestly you started it LMAO.

Jaz Avalley

Model Railway Discussion Group

https://www.facebook.com/groups/495282280644117/
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Peter Rust Rusty Pete

 

Ruger 1022 does a nice 110 magazine/drum...I kid you not reminds one of a Tommy, apparently has a tendency to jam (what a surprise 😃), and as .22 is still legal as a semi.....plinking can be so muuuuch fun.And for a bout 20quid less than a take away 😃 The US guys put it in a pistol chassis ðŸ˜ˆ and add the drum (110 mag)😈😈😈 not so smarty looking with a coat hanger attached to the end though UK legal...sighs.

Sorry for continuing off topic, but honestly you started it LMAO.


Happy for this thread to go where it will.
I think the Ruger would not go through my loading gauge or bridges.when mounted on the gun carriage. 
More than one way to skin a cat ðŸ˜‰
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