They are attractive ropes, with an excellent and smooth touch.
These ropes meet the EN1891: 1998 type A. So are suitable for both double rope (DRT) and SRT. But, focused in DRT.
As Courant explains on its website, Japora is the result of 2 years of research, development and testing with arborists from several continents.
Ozora derives from Japora, is the same concept of rope but with a greater thickness. The 12’5 mm ensure a better comfort when it comes to grabbing the rope and add friction to the system that gives a feeling of greater control on the descents.
For those who have large hands or feel discomfort with smaller ropes, moving from 11.5 to 12.5 mm can help reduce discomfort, but we will carry some extra weight.
Courant explains that there are ropes designed exclusively for the needs of the climber. A rope concept that maintains long-term flexibility and shows good resistance to abrasion, also with metallic devices.
Made with double braid of 24 braids offer a unique touch. The core is composed of a combination of fibbers that achieve a perfectly circular rope, light and a low elongation coefficient.
Incorporates internal core, an ingredient to get the rope to maintain the shape.
With each rope comes a manual that includes a printed label with data identifying the product.
You can see how Courant tells us that the durability is 10 years and that it offers a 3 year guarantee. That gives added confidence in the product.
The spliced eye that Courant offers us in Japora and Ozora, is an eye ‘same diameter of the rope’ that incorporates a patented labelling system inside.
The labeling has a detail of high quality, goes unnoticed. But it gives us the necessary information at any time.
The label inside the eye, on one side and without interfering with connectors. The resistance of the eye is 2000daN for Japora and 2200daN for Ozora. Exceeding the standard set at 1500daN.
This detail is an ingenious and interesting solution: labels and stitching can be a problem when wanting to pass an eye on mechanical devices such as Zigzag or SpiderJack.
In general, it can be said that it is a product with an excellent quality and functionality.
Ozora is compatible with the Zigzag, its 12’5mm are in the range of its use (up to 13mm). But the eye does not allow you to install the rope as you can with Japora. A shame
Let’s see the technical data:
|Diameter||11,7 mm||12,5 mm|
|Materials||Poliamid / Polyester|
|Mín. breaking strength||2380 daN||2600 daN|
|Min. breaking strength (Spliced)||2000 daN||2200 daN|
|Cover slide||0 %||0 %|
|Weigth (m.)||93 gr.||109 gr.|
|Retraction||1 %||1,2 %|
|Knotability (K=1)||0’58 %||0’6 %|
We have already talked enough about the virtues of Japora from the ground. Following are highlights and personal sensations in use.
Something that I consider interesting is to observe how Ozora behaves.
We tend to lower the diameter of the climbing ropes, why ?:
- Reduce weight.
- Fluency in work (less friction).
- Better compatibility with mechanical devices.
- SRT compatibility.
These factors cause that the 12’5mm (1/2”) strings are practically focused for beginners or seems old-fashioned.
A main advantage of a larger diameter is the reduction of stress in the complex joints, tendons and muscles of our hands.
Japora and Ozora are very similar in the composition and manufacture. But the diameter difference offers a different behaviour.
EXTENSION – ELASTICITY
A priori, we suspect that this rope will not be as static as ropes specifically designed for SRT, but: Losing some efficiency in the climb to gain comfort when working, does it make sense? …
To check the elasticity and behavior, an anchor point of 15 m has been taken. Both in double rope and in SRT. It has been considered sufficient to evaluate the elongation and behavior.
Both Japora and Ozora are ropes that adapt perfectly to their use in DRT. Courant recommends its Kanopa rope for SRT because has a lower stretch.
The first sensation when hanging is that the rope is elastic. It went down about 40cm with the weight of a climber. (Corresponds with the 3’5% elongation that the manufacturer gives us).
But the behavior changes once you start to ascend. In the ascent it stays more static, so good sensations, a moderated bouncing and stays round to the touch, something that comforts.
The elongation indicates that there are ropes with enough elasticity to dissipate the load in case of a fall, something very important. At the same time, it remains quite static while loaded.
Of course it can not compete with a static or SRT string (elongations approx .: 1.5%). But both have a good result.
As we had seen in the first part, the spliced eye of Japora allows us to install Petzl’s ZigZag (and other mechanical devices) in an instant, just passing the eye through the back.
To help us we can use a spliced eye in a piece of throwline . We can make an eye induced to the thread, everything helps.
When we work with an eye that goes through the ZigZag we have to be aware of one thing: watch to connect the eye to the corresponding carabiner or making a knot!. We could lose the rope that by its own weight causes the eye to come out and that is not cool!
In this case, stitching of the eye block it a little, but it is worth remembering it.
Pulley cambiumsaver was used for the test. This removes friction and we wanted to see how the system works at its optimum.
Very fluid. Let’s be clear, “This is not rocket science.” ZigZag and 11’7mm rope, you already know in advance that it will go well. Japora offer an excellent performance, very fast and grippy. I’m using more frequently now my Zz.
Ozora offers more friction to the climbing system but the experience was so good. Its behavior is like that of a somewhat lower diameter.
Is a good option for those who want a thicker rope.
The test was very fun, both ropes works great. They offer an accurate and fast climbing.
But Japora is faster and very efficient. Is a great choice for DRT.
Ozora, 12’5 mm. HitchClimber.
Ozora is also great, the behavior is similar to a smaller diameter rope. I really liked to have a good grip and keep having a dinamic and quite fast system.
SRT – Rope Wrench
Japora is not the perfect rope for SRT but we wanted to test it and works really well. But its elongation can be too much with more than 20 m. to the top anchor.
Is a very confortable and efficient rope, grippy and fast when needed to remove slack (different knots).
Ozora is not recomended for SRT. It works but the diameter exceed the max. and don’t work properly in some situations.
This ropes are efficient and offer a good confort level. The round shape helps the grip and the operation of knot or mechanical device.
Very flexible! Both ropes are designed for the climbing arborist. It allows to make knots in a easy and fast way.
Japora offer a high perfomance rope for DRT, lightweight and fast response. In SRT becomes to dynamic with more than 20-25 m, but allows working with RW. Highly recommended.
Ozora is . The 24 braid construction offer an smooth touch. Allows working with mecanical devices or knot. Is a good choice for beginners or for those who need a better grip.