C4 Vgr Water Rail For Flap

C4 Vgr Water Rail For Flap. VGR - Variable Geometry RailsThe water rails, invented by C4 in 1994, play the role to control, canalising it, the water on the blade. They make the swim with fins stable, the fin moves as led on two rails; the performances are enhanced by the total lack of "derapage" effect. In plain breath-held diving, where the performance is executed in controlled conditions, in quiet waters, in a straight path with constant charges, the performance is obtained with the matching of least energy consumption and highest speed.The requirements for fishing are different, because an easy handling, a sudden spring and variable charges, due both to fishing needs and changing sea weather conditions, are required.Therefore the main thing requested to fins is their adaptability to the changing work conditions to which they are subjected. As we know, the improvement of performance is always reached by adjusting in specific way the features of the tool, to the action needs. Changing needs require modifications in the equipment. Only one thing good for all means to be satisfied with common performances and this is not our philosophy.The water rails VGR (Variable Geometry Rails) let in a new concept in the system of control on the amount of water worked by fins. By them the canalisation of water flows is progressively modified according to the area and the fold of the blade, improving the performances.We know that, owing to the move led by the foot on the fins, the speed of water running on the blade is increased, passing from the foot to the blade end. It is this that provokes the propulsory push of the fins. With the water rails VGR, water amounts worked are progressively modified, following the speed changes of this in the progressive sections of the blade. A further advantage given by the water rails VGR is they take at work a special shape of the “L” sections, strongly reducing the rips between the layer of moving water on the blades, in comparison with the static one of the sea. The water amount worked by the water rails changes according to their dimensions. Low water rails work little water, if high they work more. With the same conditions of materials, surfaces and applied energy, more is the worked water, stronger is the push. It is for this that long blades pushes more than short ones, because they work more water.With the same conditions, the worked water becomes the one controlled by the water rails, that are useful the largest possible, to work the maximum of water, this consistently with the elastic response of materials, hardness, geometries and dimensions of the fins. Task of the designer is to amalgamate materials, stresses and dimensions to get low consumptions of oxygen and high speeds.Therefore the water rails VGR have the largest possible dimensions for each section of the fins, to make the maximum possible quick the worked water amounts.What is useful, where and when it is useful, it is so that higher speeds and energy saving are obtained, as it is with the water rails VGR.

C4 C4 Falcon Blades (pair)

C4 C4 Falcon Blades (pair). The aim is to use carbon fibres for diving, obtaining significant improvements in the equipment-s performance. The sea is a hostile environment for man, so equipment is fundamental in order to operate. Movement is the first thing to be achieved in order to enable any form of operation. The flippers are the equipment which transforms our energy into movement. You may often hear about more powerful flippers, which is far from the truth. Flippers transmit energy, and since they cannot produce it, they have the same effect as a boat with a propeller rather than a motor: in this case our legs are our motor. There are two design philosophies regarding diving flippers: one tends to create a spoon effect, while the other creates flexible inclined planes that move by gliding through the water. Flippers with the spoon effect are inspired by fish fins. Unfortunately fish fins are connected to bands of muscles, and the form they take during movement is due to the fact that they are alive. As opposed to the scuba diver-s flippers, they also act as the motor and transmission, which is totally impossible for the scuba diver. To give these flippers their characteristic spoon deformation, some of the scuba diver-s energy has to be used in order to deform the flipper. The greater the deformation, the more energy is used, reducing energy needed for moving the scuba diver ahead. The flipper adjusted to the spoon shape uses a lot of water only when deformed to its maximum, which is obtained for a short time by flipping movement, creating an erratic, throbbing push. As we have learnt from physics, the greatest consumption of energy occurs during accelerations, a throbbing push that makes us accelerate at each leg movement. These flippers are very easy to use, as the throbbing movement required is similar to the natural walking movement, providing high performance even for those who aren-t trained in swimming with flippers. The carbon fibres are low stretch materials, but to create a spoon effect, the materials used have to be stretchable. Only a fool thinks that a composite flipper can be deformed along two lines forming a spoon, since however many -waves- the surface of the blades can have, the laws of physics provide no alternatives. The construction philosophy of the C4 flippers has always aimed at obtaining the highest performances, so our flippers work like flexible inclined planes with very high spring back (extremely small hysteresis loops). They glide through the water, covering a sine curve that produces a practically constant push, thanks to the different angles of the leg muscles during the flipping movement along with appropriate training. A constant push requires less accelerations, which means a lower consumption of energy necessary for moving ahead in the water. The bend of our blades is deliberately gradual, and the laws of motion in a fluid follow exponential rather than linear progressions (constant curving). As an example, just look at a fish from above: while swimming the curving is progressive, with the head almost immobile and gradually more curved towards the tip of the tail. On the sides of the C4 flippers, there are vertical edges in rubber that serve to protect the carbon blade from any abrasions. By moving in the water, the flippers create swirls and vortexes of water along its sides, actually losing 50% of the energy that we use for moving with flippers. It is very easy to test this out: just apply coloured cotton threads each 4/5 cm long on the blades with adhesive tape, in a checkerboard arrangement. Moving with flippers, we can see which direction the water takes. If the flippers are without high lateral edges, for the FALCON C4 they are 24 mm high, the threads will be positioned at 45°, showing that half of our hard-earned energy is lost. There are two materials making up the carbon flipper blades: resins and fibres. There are various types of usable thermosetting resins, that is epoxy and polyester resins. Epoxy resins have the best mechanical characteristics, and coupled with carbon fibre they make the best construction material known to man. Used in the aerospace industry and racing cars etc., they obviously cost accordingly. The polyester resins have low mechanical and heat resistance, and are used in the nautical sector and general industry (containers, pipes, etc.), where low weights and high resistances are not fundamental. The average cost is less than a third compared to the epoxy resins. C4 uses only the best epoxy resins for its products, as the use of economical materials lead to low results in terms of performance. For the fibres, C4 uses carbon fibres and R glass fibres, highly resistant materials that actually realize blades with low energy consumption (small hysteresis loops). There are other fibres that can be coupled with thermosetting resins, such as the aramid fibres (Kevlar made by Du Pont) and polyester yarn based fibres (Diolene, Diolen, etc.) These have an opposite elastic behaviour compared to carbon fibre and absorb energy during deformation without returning it (large hysteresis loop). The aramid fibres are used successfully as anti-projectile coverings because they absorb energy, as opposed to what is needed in the flippers. The only use for polyester based fibres (Diolene) is that they are easily coloured in black and look like carbon, whilst costing 5 times less. They are only compatible with polyester resins, and can create objects with a carbon -look- at a low cost. However, the mechanical performances for each unit of weight are distinctly lower. There are different types of glass fibres, but the R type used by C4 is the best available. It is highly resistant, costs accordingly and is compatible with epoxy resins. The S glass, normally used in the nautical sector, has lower costs and performances, and is compatible with polyester resins. Using the best materials is the basis for creating an excellent flipper. Following the success of the C4 flippers, there are now various composite flipper proposals on the market. Some of these use economical resins and fibres, retailed at similar costs to ours. The best athletes in the world continue to use our flippers without being sponsored, which proves that C4 does not even have to demonstrate the efficiency of its flippers.

C4 Urukay

C4 Urukay. The first time you see it you wonder if you like it or not. You take and weigh it in your hands... then you feel surprised about how much mass is into these black shapes, with rather unpleasant proportions, so definitive. Then it involves and enchants you...Thats URUKAY. It expresses power without kindness, a fatal attraction of brute force, it inspires respect.Technically it is an real monocoque 100% Megaforce T700 carbon fibre, moulded by N.J.C. (No Joint Construction) system by C4, with AISI 316 mechanism and a titanium hair trigger.The muzzles metal tags used to contain bands placed parallely on the shaft, are clearly over dimensioned, as everything in URUKAY. All that you need for a great deep blue spearfishing day.In line with C4’s philosophy of "before lining up the target ", URUKAY matches the exuberant power with the hydrodynamic shapes that favour backward masses and hydrodynamic barycentre. Their proximity with the hand grasp reduces the distance and therefore the effect of the weight to be moved without reducing the contrast at recoil.While dry, it seems not immediate to be moved, but underwater you discover as, notwithstanding their impressiveness, its shapes upset remember the keel of a sailing boat, fluently “sail” without forcing and using the hydrodynamic barycentre.Equipped with double anatomical adjustable handle in a well visible orange colour, it allows an adaptability to grip needs without limits. C4 anatomical handles are available both for right and left-spearos.The C4 easy loading system with movable screw is useful in URUKAY. It is indispensable to charge on longer sizes the bands required for heavy shafts. URUKAY is made for shaft from 7mm to 8mm diameter.On the muzzle there is a thread M8 hole for leads, if they are required to balance the set up. Leads are supplied with the product.The URUKAY trigger mechanism accept without problems triple circular bands without loosing its sensibility.The shaft-guide, needed for the use of barbed shafts, is limited to the bands stroke. There is only what is necessary; the rest would provoke only useless frictions slowing down the shaft.The bands parallel to the shaft do not compress it on the shaft slide, this reduce frictions and avoid the waste of energy with full advantage of high speed for the shaft.URUKAY is available in three lengths, 120cm - 105cm - 90cm.Specifications: - exclusive C4 design with backward volumes- monocoque 100% Megaforce T700 carbon fibre- moulding NJC (No Joint Construction)- partial shaft-giude- muzzle with bands containment- AISI 316 rearward hair trigger- easy handling - easy loading system with movable screw- orange double anatomical right and left handles- versatile: multiple setting with double or triple circular bands- for shafts from 7mm to 8 mm- reel MPL 55- great accuracy and control of lining up- minimum maintenance- strong solidity and long-life- 100% made in Italy

C4 Mr. Iron

C4 Mr. Iron. Mr.Iron is pragmatic, you look at it and you are convinced. Substance, essentiality of technique in an avant-garde technology. A design easy to be understood made by shapes telling you immediately their elected destination. “It will be fitted everywhere”... this is what you think the first time you see it and the usage just confirm it.It has got nothing necessarily special, but in it nothing is normality. From the manufactoring in carbon fibre N.J.C (No Joint Construction) monocoque 100% in carbon fibre Megaforce T700, to the use of milled titanium CNC for mechanics, to the adjustable handle, to the use of mono-bands, to the easy loading system.Control the movement underwater is the key point for spearfishing, that due to apnea has therefore a limited time.To reach actions goal , it is necessary to be able to line up at correct distance the shaft with the target. If the speargun is not quickly lined up, his ballistic abilities will be useless.The main feature of a good speargun is therefore versatility, intended as the capacity to adapt itself easily and quickly to rapid change of spearfishing situations.Thanks to shapes that favouring the handling and to rearward barycentre, Mr.Iron allows a very good management of lining up to the target. Its adjustable handle, available in two sizes, allows the best fitting to dimensions of one’s hand. The adjustable handle of Mr.Iron, in a well visible orange colour. It is intentionally made vertical and symmetrical because this configuration let you feel how the gun is lined up without needing to look where it is directed. As optional accessory it is possible to use the orange anatomical right and left handles.The muzzle is an indispensable element for the accuracy of a low frictions speargun such as Mr.Iron. It places exactly the bands traction respected to the shaft, allowing accuracy and at least as possible frictions with full advantage of shaft speed.The muzzle of Mr.Iron is very small but extremely strong. It is made up of AISI 316 worked by millers CNC, of only 6 mm thickness and of very few grams weight.he anatomical trigger sets in action a rearward release mechanism in AISI 316 that in the time has become a reference for safety and sensibility.All the mechanic parts of Mr.Iron are burnished for the best camouflage.Mr.Iron is serially equipped with MPL55 reel, characterized by a light and strong reinforced nylon reel with the capacity of more than 50 mt of line. The reel is characterized by a clutch double system, the first acting on the reel through a regulation knob easy to catch and the second one acting through a spring moulded directly on the line winded in the reel.This last clutch allows the best adherence of line during the rewinding and avoids knots if it is quickly unrolled.Mr.Iron carbon fibre structure does not require maintenance, is stable in the time and does not change in dimensions.Mr. Iron is available in 5 lengths: 119cm – 104cm – 94cm – 79cm – 61cm. Specifications: - exclusive C4 design with backward volumes and very thin muzzle- monocoque 100% Megaforce T700 carbon fibre- moulding NJC (No Joint Construction)- titanium muzzle with bands parallel to the shaft- AISI 316 rearward hair trigger- easy handling- easy loading system with movable screw- reel MPL 55- double adjustable handle- for shafts from 6,0mm to 6,5 mm- great accuracy and control of lining up- minimum maintenance- strong solidity and long-life- 100% made in Italy

C4 Cx 30 Carbon

C4 Cx 30 Carbon. A fins with a great energy with the combination of a carbon T300 and T700 elastic modulus.It is a perfect fin for any type of fishing.These fins are equipped with the news EVO Footpockets, a new model injected with rubber and elastomers that make suits perfectly to the feet. ( not mounted).More comfort, less bouyancy and thurst it on the instep.The new side starps, also injected with this material, have no intervention on the job it was designed bladed, completing a perfect set.Measures: 800x195.

C4 Mr. Carbon Pd Kit

C4 Mr. Carbon Pd Kit. 6,5mm Spetton EuroShark ShaftDouble Band Spetton Black Premier 18mmSpetton Euro Dynema Wishbone1,6mm Nylon USA with rivets

C4 Graphite Kit

C4 Graphite Kit. 6,5mm Spetton EuroShark ShaftDouble Band Spetton Black Premier 18mmSpetton Euro Dynema Wishbone1,6mm Nylon USA with rivets