The Salvimar Predathor Vuoto 55cm speargun is the elite version of pneumatic speargun models.
- Includes a high/Low power adjustment feature
- Alloy and fibreglass reinforced nylon construction
- Internal barrel diameter ID-13mm
- Dynamic four-sided line release
- 7mm air spear shaft included
- Available in 55, 75, 100
- (Does not include reel)
- Round alloy barrel
- Vacuum muzzle
- 75cm in length
The main key feature that sets the Salviamr Predathor Vuoto apart from other models is the vacuum dry barrel. With standard pneumatic air guns, as the shafts are pushed down into the barrel and loaded, water also goes down into the internal barrel. When you fire the gun, the piston that is inside the gun has to push the shaft out of the gun and it also has to push the water out. So the piston is working harder pushing both the shaft and water out, so in doing this the gun loses a little power.
What the Salvimar Predathor Vuoto does to set itself apart from the other models is it has a dry internal barrel. So at the nose of the gun, there are O-rings that secure tightly around the shaft as its loaded down into the speargun. It prevents water from leaking into the inner chamber. So when you fire the gun, it only pushes out the spear and it does not have the added drag on the piston of having to expel water. So the common name used for this process is a Dry Barrel.
So due to the spear receiving maximum power from the piston, the dry barrel guns can provide roughly 30% more shooting power than standard air guns of the same size in length. The Salvimar Predathor Vuoto also is fitted with a power adjustment lever. This is ideal if you have the gun loaded in full power and see a fish in a cave. You can then flick the switch to lower the power and this, in turn, reduces the shooting power so you don’t hit the fish too hard and damage the spear in the cave. The speargun comes supplied with a stainless steel shaft as well as a hand pump, shooting cord and loading handle. The pump is only needed if you ever let the air out of the gun to travel by plane as airlines generally request you do so.
Some people are unaware that once pneumatic / Air spearguns are pumped up and pressurised, they do not ever need to be pumped up again after the first time. They do not discharge/dispel any air on firing as this is a common misconception. As you load the gun you are compressing the existing air inside the gun, compressing it with your strength until it is loaded. Then upon shooting the compressed air propels the spear out of the gun but the air is trapped inside the gun due to its O-ring seals.
So taking note of the above information, if a diver did not have the strength to load a full max charged airgun he could release some air through the purge valve, to a level in which he could load the gun. This enables the gun to be custom suited to divers learning or a little weaker in strength than others. As the pressure is always the same the spear will always behave the same with each shot helping you master its accuracy and hitting your target time and time again.
Another point to note is as the shaft is propelled by a piston directly pushing behind it upon firing. This gives the shaft a TRUE straight projection to where it was aimed to give you the best chance of hitting your target.