SpudFiles

I've been dorment for too long..


I got the itch again after my son fired " Old Shatterhand", my multishot PCP..I decided to build one for him.

For those who missed it ( long read, but worth it) http://www.spudfiles.com/forums/old-sha ... 17827.html

Lost the youtube channel though, so no vids.

Anyway..
A more serious airgun for my kid this time, after some Nerf projects.

I set out to build him something to last a lifetime, a wallhanger for when he's grown.

So...I decided to make a muzzleloaded coaxial repeater, in a Lukens kind of style.
An airgun to resemble a flintlock musket..wich will launch anything shoved down the barrel.
Soft and light stuff at first...he's still young.

I used the tubes from a motorcycle front end, since they served me so well last time.Thick smooth steel walls...
The original plug was drilled to accept the barrel and an O-ring seal.

The piston is made from thick rubber, with an O-ring superglued to it.The O-ring naturally expands against the reservoir walls.
I used one slightly larger than the I.D. and pressed it onto the piston with a brass cilinder while the glue set.
All in all it is 100% airtight -one way offcourse, and comparable in weight to a QEV piston.
A light spring keeps it in position and prevents it from flipping over.

It actuated spot-on..just like a factory made QEV.

A hammervalve is added to pilot and an extra supply of air is held in the buttstock.I've restricted flow between the valve and buttstock to act asif the piston would have a tiny equalisation hole, yet it doesn't.

Same type of system as I used on Old Shat, just a different approach.

Tapping the hammervalve to fire, repeat untill the gun is empty...

Just started on the project, the hammer shown is just a mock-up.
I need to set the fillplug in place, add a trigger mech, hammer, sights, paint, woodwork, engrave it some, decorate etc.. etc...

And boy do those scrathes pop out on camera! Wyz should have a blast!

But here are the first few pictures:

(More will follow)

I cannot fathom how you make such awesome sh*t.

Bread is what I use mostly...

It's pretty basic...
Coaxial in a tube, connected to another tube.

The brass bar holding all the pieces ( reciever?) was lathed down to fit inside on one side.
The other ( bigger) end was filed down to fit the sideplates...and tapped for the pipe-connection.

I used a square elbow to house a hammervalve...and voila.

Unfortunately my welder died ( I think) so the conical buttreservoir I had collected all the pieces for is out...
Wich is no problem really.

I guess I'd better save that for ....another project anyway...

I just made an m8-to square-to m6 axle for the hammer...so pretty soon it should be functional..

I just love the look of the receiver with the brass and steel... metal-on-metal is so sexy... Excuse me while I go change my boxers

Please bless us with an actual video once its done... and leave it online so the future generations can have the privilege of viewing it...

I foresee yet another legendary creation coming our way!!

Looking great as always Brian I especially like the MS paint artist's impression hehe

Looking good, I wish I had a father like you
Finally some decent photos
I wouldn't use a rubber piston if he gun is build to last, they suck oil and get stuck... at least in my case.
Actually I'm making big progress on something that I'm not so shamed to show you right now

Looking great as always Brian I especially like the MS paint artist's impression hehe

Thanks!
You always say that...
If the idea doesn't come across with a simple sketch...it is most likely not thought through very well.

I've been building stuff that shoots for so long that the real challenge is no longer to make it simply work.
My goal is to make it work simple.

I've made another lock-plate as I couldn't get the internal stuff mounted on the initial one.The brass receiver is partially in the way of anything rotating there...and then there's the airline to the stock...

I needed to move the hammer(-axle) location back so I'd have room behind it for the trigger parts.
I'd already drilled the hole...so I needed to repace it alltogether.

After looking through some books on flintlocks I decided to make the front of the plate longer to allow an external leafspring.
This too frees up space inside and looks about right too.
The leafspring will drive the hammer, wich I will sculpt from thick sheetmetal.

Pictures will follow after I fit the hammer...
Haven't yet found the wood to make the stock..

Looking good, I wish I had a father like you
Finally some decent photos
I wouldn't use a rubber piston if he gun is build to last, they suck oil and get stuck... at least in my case.

I wish I'd had a father like me..I wouldn;t have had to buy the tools and learn the trade myself...
If you would see the piston you'd know..
It's less than 6mm long in all.Shorter than the piston in a QEV.
If the glued-on O-ring expands with oil it still won't have enough surface area to get stuck.

It can't lodge itself.

Brian the brain wrote:If the idea doesn't come across with a simple sketch...it is most likely not thought through very well.

I've been building stuff that shoots for so long that the real challenge is no longer to make it simply work.
My goal is to make it work simple.

You're starting to sound more like you, excellent

You're starting to sound more like you, excellent

I sound excellent?


Haven't you heard me sing?

anyways...
I haven't made the hammer yet as I had to work out the exact dimensions.
The leafspring has to be able to give it enough momentum to knock open the pilotvalve at fairly high pressure.The hammer needs to hit it at the right angle and have enough travel from " top dead center".

On top of that the weight needs to be just about right.
I worked it all out in a prototype hammer.
Without a trigger I simply cock it to the point where the leafspring keeps it in balance and give it a gentle push forward.

I managed to get 6 good shots from a 10 bar fill.

Looks really good as always BtB!

Ill have to keep close eye on this post. I love everything about it (so far)

I understand the muzzleloading which I like a lot, but ( a newbie question) Why don't you make it a multi-shot with a mag of some sort.
its sorta late for that now, but its still a thought.

What caliber is it exactly and yeah. Looks beautiful. Any kind of power or accuracy?

Holy freakin Shat, this is amazing.

So let me get the system straight, the hammer valve just drops the pressure a little causing the piston to move back, but since pressure remains in the pilot it pushes the piston back forward once enough air leaves the chamber?

You've got it about right Gunfreak.
The pressure drops more than just a little though.
It all happens fast.

The reason I don't want multishot this time is :
This is more fun when it comes to actually shooting it.

I've made enough stuff to know what I like and what I don't like..

The original Shat is a multishot.
I don't like the uniform ammo needed for smooth operation.
After demonstarating it to my neighbour I muzzleloaded it with tater and bb buckshot and realised it was more fun that way.
My son got the opportunity to fire it a couple of times..

Just shove anything down the barrel and launch it.

Accuracy is pretty consistent with a real blunderbuss....
I intend to keep pressure under 300 psi as it's for my kid.

Relevant double post:

I got the hammer roughly shaped out now.
Drilled and then filed a square hole to fit the squared axle I made earlier.

One end is squared, the rest is round for smooth operation...with a large flat head on the other side.Like a disc.
I'll cut a notch in the disc for the trigger to hold on to.

The hammer still needs a lot of filing and sanding before it is done, but as you can see in the MS Paint sketch-up ( esp. for JSR!) I'm confident it'll fit the look I have planned.

That's f*cking nice!
It'll be on hell of a antique muzzle loader, if you do some aging on the metal it will look good enough to have it's place inside a museum. Your garage it's sure a place that I'd pay for a ticket to visit.
That's an odd spring setup, so I guess the pilot valve is very easy to open.