Titanium is a lightweight and durable metal with extremely high corrosion resistance. If we take the corrosion rate of aluminum alloy in seawater as one, then stainless steel will rust 1,000 times slower, and titanium - 1,000,000 times slower. This allows you not to worry about the safety of the main parts of the speargun, even after prolonged use. Titanium forgives not only insufficient care for the speargun, but even its complete absence: there is no need to wash and wipe the speargun after sea hunting. The seawater remaining in the internal cavities does not cause corrosion.
Once a hunter drowned our speargun at a 15-meter depth in the Sea of Japan. It could be only find after 7 months, overgrown with shells and mucus. To restore the gun, it was enough to hold it in hydrochloric acid to dissolve lime deposits, even disassembling was not required!
And besides, titanium is beautiful, it is produced in our region, in the Urals, and it is pleasant to take a speargun made of it.
In our opinion, these three lengths cover the entire range of water transparency in Russia: from the most muddy marshy and peaty water bodies to clear lakes and seas, which cannot boast of Mediterranean or ocean crystal clarity.
A "short" speargun can be used during night hunting. For many Russian waters, this length usually is enough.
The "medium" version is the main one for most of Russian waters, well suited for hunting in reeds, marshy parts of the waters, and in snags. It has enough power for penetrating through a 19-kg carp, tested experimentally. About power. The speed of a harpoon can reach or even exceed 40 m / s, which corresponds to an energy of 125 J. This is approximately the same as that of 0.22LR rifle (120-140 J).
"Long" version - for the cleanest lakes and seawater of medium (or even good) transparency. When doing sports underwater shooting from such a speargun in the pool at 5 m, it was easy to hit the top ten (49 mm diameter). However, need to clarify that sports shooting is performed with a fishing line, which is much thinner than a hunting line, with a stabilizer instead of a sliding sleeve on the harpoon and after zeroing for a specific distance. In a real hunt, hitting such a target is much more difficult, but then the size of the fish of interest to us is bigger than 49 mm…
Yes, if these devices are designed for mounting to the receiver having diameter of 29 mm. If not, we can always help to solve this problem.
When testing the spearguns in stationary conditions, we made 1000 and 1200 shots. In both cases, one seal was enough. But this does not mean that in real hunting the result will be the same, because of suspended particles: sand, silt, etc. The seal's lifetime depends on the amount of particles suspended in water. In reality, with intensive hunting 1-2 seal are consumed for the season.
The smaller the diameter (and hence the mass) of the harpoon, the higher its initial velocity, but the faster it is lost. The average speed is higher for heavy harpoons (even tungsten harpoons, which are 2.5 times heavier than the steel ones, were used in sports underwater shooting). If the speed is too low, the fish can "run away". Therefore, the choice of the harpoon diameter is the optimal ratio of speed and effective range. We chose 8 mm. In addition, the thicker the harpoon, the more difficult to bend it (although, of course, it is possible).
The jamming and destruction of the harpoon's sliding sleeve is an unpleasant problem. It occurs when thickening in the harpoon's back differs slightly (0.4-0.5 mm) from it's diameter, as is the case with some spearguns. This is due to the wear of the surface of the sleeve and the harpoon, which form a hydraulic buffer.
In our speargun this is impossible, since the sliding sleeve, when shooting, interacts with the stopper (seal holder), having the diameter as much as 3 mm larger than that of the harpoon.
In the moment of a shot, a small click is heard from the line releaser movement softened by water. But it is usually drowned out by a louder sound. According to video records, it occurs due to cavitation behind the harpoon. This is an inevitable consequence of the high initial velocity of the harpoon (recorded up to 40 m / s), which in itself is a positive fact. The fish does not have a time to escape from so fast harpoon. But if it escapes - this is a bad sign, which can mean a malfunction. This may be wear or damage to the harpoon seal, which results in partial back leak of water instead of fulfilling the receiver that weakens the shot. In this case, replace the harpoon sealing immediately.
This depends on the local legislation, in some countries it is a serious problem. In any case, the largest part of our speargun is 594 mm long and can be transported in almost any suitcase. The disassembled speargun – even more so.
A laser designator (LD), - a device which generates a laser beam directed so that when pointing the target, it guarantees to hit it.
Firstly, shooting with LD is much easier. Usually, we must first extend our hand, combine the "front sight" with the "rear sight", then all this with a target. With LD, it is enough to put the red spot on a target, it is simpler, which means faster. Video analysis shows that it takes only 0.5-1.1 s between to put a laser spot on a fish and a harpoon to hit it.
Secondly, and this is the most important advantage of LD, - a chance to make a shot in a cases when it cannot be done with usual aiming. A hunter who swims in thick and swampy undergrowth, very often, for this, must first pull his hand with a speargun out of the thickets or snags, direct it towards the noticed fish, find the front and rear sights, combine them with a target, and all this quickly, but silently ... One who is "in the subject," will understand how complicated is this task. With LD, one can turn the speargun in the fish direction from the most inappropriate place and push the trigger. By the way, the speargun can be held with both hands. After that, one can only wonder how such a shot could be so successfull!
According to the results of two hunting seasons "in the reeds" with LD (pike, bream, crucian carp, tench), we can say that there was not a single miss! Of course, except for the fish that did not give any opportunity to react.
Absolutely, we can say that at night - no. More precisely, no more than it is afraid of a flashlight. The effectiveness of such a hunt increases very significantly (approaching 100 percent).
During the day the situation is somewhat different. For example, a pike is not only not afraid, but even stops when it sees it. Here it stands, her back is strained, the fins tremble, ready to give a starting acceleration, but a ray appeared - the back and fins relaxed, curiosity appeared in the eyes.
The pike-perch and the bream react rather calmly. Carp and his relatives do not get scared during the day in the reeds either, especially if not to light into the eye. But in the shade, under the "roof", the carp can get scared of the red stick that appeared suddenly.
Well, if so. And yes, experienced shooters develop the skill of “intuitive” shooting (scientifically called “muscular sensations”). But, you see, any skill requires improvement, and LD helps to do it perfectly. It is possible to train on perch passing by, and on the “burdock” that suddenly appeared in the grass, and just at home on the sofa (“idle,” of course). Perfection has no limit!
I envy those lucky ones who never aim and never miss. Most likely, their target is a fairly large fish, which is regrettably rare in our region. But when the whole catch is a pair of small pike and three crucian carp, the value of each shot is very high (either I will have a delicacy today or not).
The current consumption is 100 mA, the capacity of AAA alkaline elements is 400 to 600 mAh, i.e. theoretically it should be enough for 4-6 hours. It all depends on temperature and intensity of use, but in any case, it will be enough for several hunts. And to someone for the whole season, and not even one. Of course, it is recommended to turn on the laser at each dive and turn it off after it.