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Taimen - Russian pneumovacuum speargun

popgun pete

Well-Known Member
Jul 30, 2008
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Australia
Here are some photos of the new replaceable polyurethane bush spear tail. Previously the polyurethane bush was molded over that one-piece tail and there was no easy way to replace it, in fact for this reason I purchased three extra spears with my "Taimen" PVRM600 gun. I had a slight hand in this new design as for some time I had my own thoughts on how to do it. As you can see the rear end of the new tail now screws on in order to trap the polyurethane bush in place and can be tightened up with a thin rod or screwdriver blade passing through a small transverse hole located in the extreme rear. A slight taper on the spear tail prevents any problems with the transverse hole passing through the vacuum cuff. Tension provided by the polyurethane bush being squeezed up prevents the spear tail from unscrewing during use.
96Hg0i2NPTM.jpg

new spear tail.jpg

new spear tail3.jpg
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
The "Taimen" prices are going up next year by 10%, so if you want to buy one now is the time to do it as by the 27th December (I think, not entirely sure of the date) the old price list ends. In some ways I regret buying the LG-Sub Manilu "Revolution" (yet to arrive) as I was toying with buying a "Taimen" PVM850 or PVM1000.

Here is a short video of a "Taimen" 600 model being unpacked and tested.
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
Here is a laser sight installation on a "Taimen" speargun which is very compact and has a grip mounted switch to turn the laser sight on and off.
YUIKRCd7TYg.jpg

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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
More photos of a sectioned "Taimen" showing the inner layout and demonstrating the very compact nature of the gun.
QY0eyevxm1g.jpg

Taimen sear cover AR.jpg

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Taimen muzzle with polyurethane bush.jpg
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
Preventative maintenance: At end of the season and before long term storage with the gun held vertical depress the valve stern and release all air including the oil which is completely pushed out by the rapidly escaping air. Hold the gun above a container to catch the displaced material from the gun’s interior while performing this task. Examine the oil for any contaminants, if no water is present in the oil then this is good, otherwise the gun must be disassembled to investigate causal factor and arrange for a prompt repair.
gun cleaning oil removal R.jpg

Actually this gadget could be used on any pneumatic speargun, but the "Taimen" has a plastic valve stem which requires a broader plunger to spread the contact pressure over the end of the stem, whereas for a ball type inlet valve the plunger needs to be narrower so that it will fit through the hole in the inlet valve body, but only for about a centimetre in length as the rest can be thicker to avoid any tendency to bend under loading.
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
Taimen side mounted line release is now available as a spare part http://taimen.pro/catalog/zapchasti/item/bokovoj-linesbros
linesbrosbok_a46ac25514558735457c42a0efc9caa9.jpg

and the matching trigger http://taimen.pro/catalog/zapchasti/item/spuskovoj-kryuchok-dlya-bokovova-linesbrosa
IMG_20180820_101355663.jpg

Also complete side line release equipped handle is available with or without thumb support and with or without power regulator entry port in top of handle on left hand side. http://taimen.pro/catalog/zapchasti/item/rukoyatka-s-bokovym-linesbrosom
handle with side-mounted line slide.jpg

Taimen catalogue here https://vk.com/doc-152421109_467023838?dl=311af60731becf0af3
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
Original "Taimen" spear has tapered front end polyurethane bush, so the bush only contacts on outer periphery as it enters the hydraulic shock absorber bore machined into the rear of the line slide. I have had no problems, but have three identical shafts to use, thus wear and tear spread out over all three. Fourth shaft has fixed tip and small twin floppers that is not much use to me as one hit on a rock and it is kaput.
53747

After the shot a sharp jerk using the shooting line held parallel to the shaft pulls the slider from the polyurethane bush where it is.slightly stuck. The water of the hydraulic braking action stops the leading edge of the bush hitting the step change in the line slide internal bore diameters.
53749

original spear tail
53751

new two piece tail with separate polyurethane bush
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
Oil replacement volume can be determined from the wetted gun internal surface area as was discussed here https://forums.deeperblue.com/threads/how-much-extra-oil.101614/. The "Taimen" is a relatively small volume gun for poking through underwater weed thickets and a tangle of sunken branches resulting from submerged fallen trees while taking sniper shots at fish unaware of their impending doom. Too much oil and you reduce the volume to be filled with air pressure and you then push up the gun's compression ratio which you do not want to do. Consequently the "Taimen" only needs about 4 or 5 ml of oil, however longer guns will require more oil and this can be calculated after working out the internal surface area extension in a longer gun. Note that to get rid of the old oil completely the gun after the draining method shown above should be re-pressurized with say twenty pump strokes and then stood on its butt for about an hour and then the exercise repeated to blast the remainder out. Guns with a power regulator must be set to full power as otherwise the oil with not easily get past the throttle opening. You will never totally remove the last of the oil film, but that is the case whatever you do unless you totally dismantle the gun and throw it into a bucket of warm soapy water. If you do this then don't use detergent as it will affect the rubber, a soap solution is all you need to remove the oil coating. Then everything is rinsed in clean water and completely dried before reassembly.
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
Here is a comparison of the spear tails showing the original and the later lengthened spear tails when first inserted into the "Taimen" muzzle. Note the polyurethane bush has less of a taper than before, however whether this is a good idea or not remains to be seen. Usually the line slide would be clicked into the muzzle before pushing on the hand loader, here I have shown the line slide yet to be pushed into position.
polyurethane bush tail shift.jpg
 
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popgun pete

Well-Known Member
Jul 30, 2008
2,762
521
153
Australia
I see that a "Taimen 1400" was made to a special order, this gun requiring the stepped ladder loader to charge it! That is a very long pneumatic speargun, which is a big stretch on a gun originally designed for shooting in thickets and reeds. However the long gun was seen laying alongside a pile of big meaty victims, so it was deadly in the right hands.
 
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