Cousin Trestec – Constrictor textile clutch (in French with subtitles)

Cousin Trestec – Constrictor textile clutch (in French with subtitles)


Constrictor is a newly created product by Cousin, which revolutionizes rope clutching. Unlike conventional clutches, the Constrictor does not crush the rope with metallic cams. The system uses the principle of the textile sock.
The braided sleeve is locked to a fixed point. The rope passes through the sleeve; running one way, the rope runs freely, but when pulled on the opposite way, the cover clings to the rope under load and locks it immediately. This is the Cousin patented “Constrictor effect”. The higher the load, the higher the holding power. To ease the rope, simply pull the cover back with the control line attached to it. The sleeve retracts and the rope runs freely. The control line can be maintained in the open position so that the rope can run freely all the time. The Constrictor consists of an aluminium housing, a sleeve made of aramid fibres, a nut and olive coupling system to fix the sleeve in the housing, a shock cord and a control line. All these parts come as an assembly in the delivery pack. The benefits: Stronger. Compared to conventional clutches, the Constrictor holds twice the load. You can take the rope off the winch without worrying about it slipping. Lighter. The Constrictor is three times lighter than a conventional clutch. You save weight and increase performance. It does not harm the ropes. No wear or breach of the rope cover. The holding sock ensures a balanced distribution of the grip and fibre to fibre contact is far less aggressive than fibre to metal. Ease the rope under load. Practical and safe: the rope can be eased under load without the help of the winch. This is much safer in critical situations as you can release the rope quickly by just pulling the control line. Remote opening. The Dyneema control line can be extended to allow opening from a greater distance. As an example: the clutch for a halyard can be mounted at the mast head to minimize the halyard’s length and therefore, the elongation and the compression on the mast. – Good morning Michel! You are the happy owner of a First 40 and you recently installed some Cousin Trestec Constrictors. – More than 8 month ago, at the start of the season we installed one. We wanted to check the difference compared to a conventional clutch because we thought the idea was very interesting. But, you know, from a good idea to perfect operation there is a gap. We installed a Constrictor for a halyard and it proved its performance immediately. The whole crew agreed. Everybody came to try it and the conclusion was unanimous: it brings a plus on the boat. A plus for ease of use, fast operation, good flexibility, etc. We quickly took a second Constrictor to see if we could be satisfied again. Now, with the last two that have just arrived we have ten of them! There are no more “conventional” clutches left. Today, all of our clutches are of the Cousin Trestec range. Now we can fine tune the sails, which was not the case with the previous clutches. To achieve that with another clutch, you have to use the winch then open the clutch as a start. Once the clutch is closed back – whether it is an Easylock or a Spinlock – the result is not guaranteed. With the Constrictor, you just ease and lock.
Nothing more. It saves precious time when you race and pull the kite down, hoist the genoa…

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