Hi! Does the 50 meter longline kit come with webbing that has 2 sewn loops? Thanks! SIGMA is an element of statistical calculations, which allows to display a products’ guaranteed strength value throughout its manufacturing process. Therefore, it is related to product safety.  

During the testing process, the greater the differences between the 10 recorded values, the higher turns out the sigma value.

For example, for 10 carabiners tested, their ten recorded values are usually different and not the exact same:

24,9 | 25,9 | 26,2 | 25,6 | 25,8 | 24,7 | 25,5 | 24,7 | 26,0 | 25,7 kN

So which value to take into account to display the MBS (Minimum Breaking Strength) value? 

We first calculate the average:

(24,9 + 25,9 + 26,2 + 25,6 + 25,8 + 24,7 + 25,5 + 24,7 + 26,0 + 25,7) / 10 = 25,5 kN

We then calculate the variance:

24,9 - 25,5 = - 0,6    (-0,6)2 = 0,36

25,9 - 25,5 = - 0,4    ( 0,4)2 = 0,16

...and so on for the 10 measured values.

We add those 10 results:

0,36 + 0,16 + 0,49 + 0,01 + 0,09 + 0,64 + 0,064 + 0,25 + 0,04 = 2,68

And we create the average:

2,68 / 10 = 0,268

The variance is even to : 0,268

SIGMA (standard deviation) = square root of 0,268 = 0,5176

The maximum value displayed on the carabiner would be:

average of 10 carabiners = 25,5 kN

SIGMA = - 0,5176

____________________________

Displayed Value = 24,0724 kN

What you should know in particular about the 3 SIGMA safety margin? 

We use the 3 SIGMA method to calculate the MBS. 

We multiply the SIGMA for 3 (this is why it is called “3 SIGMA”) to boost the prudency in the MBS calculation.

Taking the 10 previous carabiners as an example:

The average of those 10 carabieners is 25,5kN

3 SIGMA (3 x 0,5176) = - 1,5528

_____________________________

Displayed value = 23,0472 kN

Our choice aims to maximize the safety of our users while using our products.  

Source @Petzl

The product has several combination that can change the total weight. You can sum the single item weight you see in the shop, in example if you select the the 25 m K2 ROPE with NO ACCESSORY, the total weight is 3,1 kg

No, the sewn loop is not included. You can add a SEWN LOOP to this kit simply by adding to the cart the product SEWN LOOP you can find in category HIGHLINE>SEWING.

Salut,

si vous choisissez la ligne PLASMA qui a une faible élasticité, vous pouvez installer une ligne de 50m à 1,8m du sol aux mâts.

Rappelez-vous que cela dépend beaucoup de la tension, donc pour tendre 50m à seulement 1,8m des arbres vous aurez certainement besoin d'un palan tel que le MINIDOUBLE ou le SLACKIMOUFLE. Merci.

The PRIMITIVE KIT 50 use about 4 m lenght for the carabiner pulley system and multiplier.
If you would like 50 m of walkable lenght you can add 4 meter of same WEBBING ording BY METER and we will deliver a full cut of 54m.
thanks

The dyneema rope diameter is 6mm.

The total weight of the FLY LINE 50 KIT is 10 Kg

If you wish to replace a webbing with TENDER, just drop a message to info@ and we will help you with the purchase of your desired webbing.
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