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Vacuum Muzzle Options

popgun pete

Well-Known Member
Jul 30, 2008
3,038
591
153
Australia
If a piston is to be used only in a vacuum barrel gun then it does not need the usual gap between the piston nose and the first piston seal as there are no relief ports to bridge across. The shock absorber anvil can then be positioned at only a small gap from the end of the inner barrel tube using a new muzzle with no relief port section and with the forward length of the muzzle devoted to a longer shock absorber if the muzzle is to be the same length as it was before. The working course of the piston will be shorter by the length of the relief port section which will be only about one centimetre.

The "Taimen" does this as it is a pneumo-vacuum gun and not a wet barrel gun conversion, in fact the shock absorber anvil is inside the inner barrel tube and the piston nose never gets to the end of the inner barrel. The anvil and shock absorber are in a sense reversed and "inside out".
 
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tromic

Well-Known Member
Aug 13, 2007
1,551
149
153
Croatia
I made one Delrin_titanium piston few years ago for my Mirage. There is a picture somewhere on this forum.. The mashroom tail had some scratches after I took it out for inspection. Probably that must be some special kind of titanium, heat treated for that purpose ..?
In my first Tomba designs there was no any tilt of the shaft inside the slider or the muzzle posible. Everything was perfectly centered with no loose connections. That perfection made the loading by hands sometimes difficult even frustrating if the shaft were bending during the loading. The solution was to make new Tomba desing: Tomba700X having for a few degrees (2-2.5) tiltable inner part of the Tomba muzzle. I suppose the slider itself in Taimen`s muzzle is also tiltable for some degree.
 

popgun pete

Well-Known Member
Jul 30, 2008
3,038
591
153
Australia
I made one Delrin_titanium piston few years ago for my Mirage. There is a picture somewhere on this forum.. The mashroom tail had some scratches after I took it out for inspection. Probably that must be some special kind of titanium, heat treated for that purpose ..?
In my first Tomba designs there was no any tilt of the shaft inside the slider or the muzzle posible. Everything was perfectly centered with no loose connections. That perfection made the loading by hands sometimes difficult even frustrating if the shaft were bending during the loading. The solution was to make new Tomba desing: Tomba700X having for a few degrees (2-2.5) tiltable inner part of the Tomba muzzle. I suppose the slider itself in Taimen`s muzzle is also tiltable for some degree.
The slider fits snugly into the line slide holder, it is a press fit and held by the "O" ring inside the holder. If you pull off-axis hard enough during muzzle loading then you might bend it and the spear and the instructions specifically tell you not to do so. The chief concern is bending the shaft and putting a permanent bow in it and then you will have problems. There are different alloys and grades of titanium, you need to use the right type for a piston.
loading page.jpg
http://www.supraalloys.com/titanium-grades.php
 
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popgun pete

Well-Known Member
Jul 30, 2008
3,038
591
153
Australia
Thanks Pete!
Taimen is not for careless users...
A "Taimen" is a relatively expensive gun in Russia compared to people's disposable incomes, therefore their owners tend to look after them. Many divers can only afford the traditional forward latching guns such as the RPP models which have all the trigger mechanism located on the outside of the gun body. There are many variations on this theme including friction spear holding mechanism (FZM) guns such as the "Wasp" (photo attached). This type of gun also includes the pistonless guns such as the Vlanik, Evolution and Mavka. The titanium "Taimen" is beyond many who would like the gun, but cannot justify such an amount of expenditure, however the standard model does the same job and importantly floats after the shot.
 
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