Rigidité
Why don't we display the GPa value of our poles ?
At AIRADIK, it is true that you will not find the GPa value of our poles.
But for what reason?nbsp;?
Quite simply because we want to be as transparent as possible with our customers.
Indeed, the value in GPa indicated by certain suppliers corresponds to the rigidity of the carbon fiber used for the manufacture of the poles and not to the rigidity of the poles, a marketing nuance...
Short simplified explanation :
A telescopic carbon pole is a set of tubes of different diameters sliding into each other and held together by mechanical elements (clamping rings).
Rigidity is the resistance that a pole will put up to torsional or shearing forces. More commonly, we can image this by the bending of the pole under its own weight.
Maximum rigidity is achieved by the combination of multiple factors. The choice of carbon used for the manufacture of a tube is essential but not only that.
Depending on the need, a carbon thread can contain between 1000 and 48,000 fibers, each of which is approximately 5 to 10 µm in diameter. It is the combination of the quality and the diameter of the fiber which will allow it to obtain the best rigidity.
A tube is made by a skilful weaving of carbon threads linked together using a resin epoxy or polyester.
To manufacture a highly rigid tube, you will have to deal with :
- the quality and diameter of the fiber
- the number of fibers in the yarn
- the direction of weaving/crossing of the threads
- the quality and type of resin to bind the fibers
- the thickness and diameter of the tube
- the tube manufacturing process (filament winding, draping, pullwinding)
- …
We therefore realize here that the rigidity of a tube is due, not to a single element (the stiffness of the fiber expressed in GPa) as some would have us believe, but at least to the various factors above.
The pole being made up of a set of tubes, all these factors must be defined for each of these tubes in order to obtain optimal rigidity.
And since it would be too simple to guarantee a rigid pole with the above elements… there are still the following elements to take into account :
- Fitting length of unfolded tubes
- Clearance between tubes
- Rigidity of clamping rings
- …
To conclude, the extreme rigidity of our poles is obtained thanks to the combination of all the factors cited above, and not only thanks to the GPa value of the carbon fibers...
It is therefore, for example, entirely possible to have a pole made of carbon fibers with a very high GPa value that is less rigid than a fiberglass pole.
If you still wish to know the value in GPa of the carbon fibers used for the manufacture of our poles, do not hesitate to ask us, we will communicate them to you with great pleasure !