Building a Modern Pneumatic Airgun

Gallery, Projects and General > Project Logs

<< < (7/15) > >>

Jonny:
Nice to see some one else in to it.
Havent made any for close on 8 years the laws have changed since. The last ones been on hold ever since but essentially made and lingering around some where.
I wouldnt pay any attention to those books, make it up as you go on and you will learn a lot more than any book to date has to offer.

Looking at it, yes it will work but know you will have trouble with that knock open valve. It drove me round the bend 19 years ago trying to self regulate them valves to acceptable limits. In the end made a regulator similar to the late Mick Dawes design often copied and used in other rifles, Anchutz, BSA, ISP and more.

Pressure tested the tube? 1 1/2 times the operating pressure, shame manufacturers dont do that. No reason to doubt your threads wont hold the pressure but its a safety thing!
Can do it with a modded grease gun and clock, fill air tube with water and pump oil in. 1/8"BSP off the shelf hydraulic will shear at 6300psi.

Why aint you making the stock, small bore tube easy and quick.

Heres an early one that packed up in 2005 used three times a week for 12 years.
http://pic20.picturetrail.com/VOL15/728921/1313294/111432614.jpg
Number 7 1996 rotting away http://pic20.picturetrail.com/VOL15/728921/1313294/15295231.jpg

Last one been on hold since Maarch 2004
http://pic20.picturetrail.com/VOL15/728921/1723145/20512931.jpg
http://pic20.picturetrail.com/VOL15/728921/1723145/20513282.jpg
http://pic20.picturetrail.com/VOL15/728921/1723145/21294937.jpg
http://pic20.picturetrail.com/VOL15/728921/1723145/303431797.jpg
Tube is done not shown, just needs O rings and a lot of faffing about to get it right, then theres the making of the stock, easy.

Theres over £6k's worth here. http://pic20.picturetrail.com/VOL15/728921/8449063/360648667.jpg

Jonny:
Actually you can up that a £1000+ theres a March scope on it at the moment.

Stot:
The test fill to 70bar was just to see if it would seal but yeah ill pressure test it up to 4-500 bar depending on if I regulate it. I have regulated my BSA Ultra and love the consistency and it sure would make spring balancing easier... :lol:

Nice stuff there right at the pioneering end of modern PCPs. :smart: Impressive FT rig, not my cuppa though, I'm more into practical hunting stuff. Love my Phoenix, it looks like a stalking rifle and does the job really well. The stocks I got off Ebay are going to work really well I think, especially as these are just for my own use. They are comfortable for me and just need re-inletting but thats the easy bit.

Cheers
Stot

JimM:

--- Quote from: Jonny on November 15, 2010, 11:36:14 AM ---
Theres over 36k's worth here. http://pic20.picturetrail.com/VOL15/728921/8449063/360648667.jpg

--- End quote ---

Is that a typo or is that seriously £36,000 ?

Jonny:
Would be bordering semi bullpup with that stock, usually rear of action is level at the front of pistol grip.
My first ones the rear end hammer to valve was short, really short then set back a bit, thumbhole under trigger block.
Sussed out short stroking back in 92 without side effects- 1.4mm hammer stroke, presentable at 2.8mm. To date no one sussed even now only running 5.5mm.

The fill probe first used by Titan in 93 a reverseal of what i came up with on first two guns plus Stalker, now used on AA what did they ever design.

Any ideas for a trigger :bang:
Single stage real easy, two stage very very hard to get right.
Did a semi bullpup in 95 in stainless G316 S11, trigger block 13" long no linkages and long first stage returning. Could hold in vice blow on blade and it would go off.

Its what i was good at back then because i didnt read from a book and understood how things should work and be made, a book cant teach that.

Navigation

 Message Index

Go to full version