Attempts to modify this first model of Saber date back to three years ago, when I tried to mount the rod from 7.5 mm in diameter on the stem of the Saber 100, the results are poor ballistic: low throw myself at 4.5 on the impact velocity target dell'arbalète armed with rod 7 mm, (despite having increased the elongation of elastic). On the segments of arbalètes longer (as the Saber 110 and the Mega Saber), in fact, the rod from 7.5 mm had shown a better behavior relative to the rod 7 mm: more rigid, flexing less and dissipates less energy.

For this reason I have tried, repeatedly weaponry segment's flagship Saber with the rod of larger diameter, to include, after several tests, the mass of the rod and the stem dell'arbalète variables are closely related: You can not increase the diameter of the rod without enlarging the size of the barrel!

The Saber 100 / 7.5, both in tank tests, both those at sea during fishing trips, showed a clear increase in the speed and range of the auction, without worsening the tilt of the gun. The auction more is balanced by the greater buoyancy of the barrel of the gun and the management is not at, indeed, the feeling for the wielder is a greater stability of the tool.
The launch of a greater mass of the auction, he was obliged to increase the power installed on the rifle. This can be achieved either by increasing the percentage elongation of the two circular bands, or by mounting one of the accessories for the strengthening of the shot, recently invented: Enhancer, Bow Thruster. So you can take two classic circular bands to stretch to 320% (weapons with which you sold the Saber 100/7.5), or use the Enhancer 2 where the elastic engine, before the hub shippers adds a spring to part ( as seen in one of the photos of the presentation). Quest'armamento without the addition of the second round, now, is the one used in my Saber 100/7.5 staff.


Comparison diagrams of speed depending on the progress of the rod tip.

In the chart below I have compared the traditional model armed with a rod 7 mm in diameter and the new model armed with rod 7.5 mm in diameter. The tests in my tank (6 meters long) do not allow measurements over the 4.5 m from the tip of the gun. As happened some years ago with the models Jedi: in step dall'armamento with the rod from 6.5 mm to that of a 7 mm diameter, have found that at the end of the auction range from 7.5 exceeds in value the speed of the ' rod of smaller diameter.

The main advantages of the new model are:

  • The performance of the model also reinforced with a 7 mm are superior to those of the primitive model for the greater inertial mass of the drum which allows higher power installed on the rifle.
  • The stability of the gun under the effect of recoil is improved considerably.
  • The effective range reaches 5.5 m in the auction version 7, to reach 6 meters in the pole version 7.5.

How is it possible that the same weapon (rod 7 mm) the new model <100/7.5> provides superior performance?
Let us consider the two variables: the speed of the rod Va and the recoil velocity of the barrel V f.

E 'plausible that a gun has superior performance when the barrel recoils at speeds V f lower and the rod is traveling at speed should be more. Assuming rifle not challenged, in a theoretical conservative system, which as a first approximation it can be assumed in this analysis, will keep the momentum of the moving parts of a rifle shot in the moment, then, the mass of ' rod (M a) multiplied by its velocity (Va), in every instant of the the bow, must equal the mass of the rifle (M f) without the rod multiplied by the recoil velocity (V f) of rifle

M a x Va = M f x V f

We are reasoning on this mathematical equation:
First hypothesis: the speed of the rod in the two models is the same.
In the hypothetical comparison, the mass of the rod M a is always the same (130 cm long rod of 7 mm diameter, 380 g), even if the launch power is the same (same elastic) and assume that the auction reaches the same speed as the old model Saber 100, the product M a x Va remains unchanged and if we increased the mass of the rifle M f , to maintain the equality between the two products of the equation, it will, necessarily, reduce the speed of recoil. A rifle with less recoil is more stable and precise.

Second hypothesis: the speed of recoil of the gun remains the same.
If now we assume that the recoil velocity remains the same in the two models, having increased the mass of the rifle M f will also increase the product (M f x V f ) and inevitably will increase also the other product (M a x Va) where the mass the auction is always the same, then increase the speed of the auction!

In practice, the two hypotheses are realized both: that will increase a bit 'the speed of the rod and at the same time will improve the stability of the rifle reducing the recoil.
In the draft of a spear-gun that launches auction of larger diameter, it is obvious that it is not enough just to increase the mass of the gun, you need to increase the power of launch for not having a weak shot (as had happened in the trials of the Jedi 106 when, with the same elastic, I mounted the rod 7 mm instead of the 6.5 mm, after that occurs, for a model with the rod 7 I had been obliged to increase the power of the launch and go, then, to ' arbalète double elastic: born the Super Jedi).

Let me be clear that the concept: in arbalètes, the variables are interconnected! If you one of these variables, inevitably changes the value of the other: for example, if you increase the installed capacity and does not increase the mass of the barrel, the gun rinculerà very (high V f) becoming unstable and losing his precision.

In conclusion, for good performance, the new model armed with rods diameter greater, you need to increase the installed capacity for the launch. In part, it is allowed by the improvement of the elastomers that now, for the same external diameter, having reduced the internal bore of the tube (3 mm to 1 mm in diameter for the outside diameter of 17.5), with the same hydrodynamic resistances of the elastomer during contraction directly proportional to  of the elastomer, offer more elastic mass that and greater kinetic energy expressed during contraction. Even with the classic armament of two circular bands is achieved a good result in terms of speed of the rod, but those who want higher performance can be used to upgrade systems that have recently invented: in one of the photos of the presentation, in fact, appears with which I armed my Saber 100 / 7.5 (precise that only quest'armamento, launch the auction of 7.5 to six meters from the tip of the gun and I armed the gun with three coats of nylon on ' rod being increased the effective range of the auction).

The evolution of Saber, however, creates a problem: the performance of the lower segments of the new Saber/7.5 tend to overlap with those of traditional segments longer.

The greater compactness of the new models, however, is to the advantage of the ease in the pan-tilt equal ballistic performance. This consideration can be ascribed in part to the experience that I did recently in the ocean where the power of the wave and strong currents make it difficult to traverse the gun to be more arbalètes the Mediterranean.

While the reasons are clear technical armament rod from 7.5 mm, as an evolution in performance of the model with a 7 mm, fitting and balancing shafts with intermediate diameter as that of 25.7 mm in diameter, may seem unnecessary diversification, in truth, even in a theoretical perspective the very slight variation in mass auction performance does not justify very different armament and more.

Mass of the shaft:
shaft from 7       380 gr
shaft from 7.25  407 gr
shaft 7.5            435 gr

In the science of ballistics underwater as far as you can do the theoretical considerations, there is always a secondary variable that you can not take into account that in practical tests showed some differences in the behavior of the auction. One of these could be the stiffness of the rod that flexing less in the way underwater reduces the resistances fluid. The stiffness of the rod does not vary linearly with its diameter and could be the factor that made the behavior of the rod diameter of 7.25 so satisfying to my practical tests at sea. The improvement in ballistic behavior, respect for auction by 7 mm by now widely proven to me is still unexplained, however, the difference is noticeable: the the more effective penetration into the flesh of the fish are obvious! Unfortunately this type of are always subjective and related to the anthropometric characteristics of the fisherman: I can only say that in my case I found an improvement in the overall performance of the new model armed with the rod from 7.25 mm compared to the old model armed with rod 7 mm.

In practical terms hunting which are the areas of application of this new line?
For model armed with the rod from 7.5, the greater power of penetration in the flesh of the fish, and the longer range, both make the Saber 100 / 7.5 segment ideal for the appearance of fish of that size are always a bit ' too far away from the fisherman (almost knew the range of normal arbalètes), I refer to the snapper and bream encountered deep and often leave no time to make pan and pointing. These prey usually s'insidiavano with longer segments to provide a greater range for auction and adequate energy penetration in the flesh of the fish.

For model armed with rod 7 or 25.7 mm field of application is the traditional one of this segment: the vast mass of the gun allows for better stability of the shot, the center of mass of the barrel has been further set back toward the handle for facilitate pan.

As standard, the model Saber 100 / 7.5 provides with all the weapons, the release mechanism to roll.

The price of the new model will remain unchanged from the traditional Saber 100, which, in the day of his is my great recognition.