Love the way you said the unit of tension keeps travelling through the system until it meets a knot, anchor or rope clamp. Very clear explanation, awesome knowledge and teaching bro!
Great content! This method it's very easy to understand! You could add the estimate percentages on force loss by friction (based on the tests you did of the different devices and pulleys, That could calculate pretty closely the force needed to lift certain amount of weight.
Usually not. For IRATA L1 you only need to have an awareness of how a basic hauling system works. Sometimes when someone comes in at a higher level and there is time and interest, we get into it. Usually not though.
How realistic are these ratios? Friction? Pulley efficiencies? 15:55 Shouldn't it be a 10:2 (output over input) which is essentially the same as a 5:1 just that you don't come in with 1?
This is all for Ideal Mechanical Advantage and might not even be close to an Actual MA. I did a few video's on that as well. Like you said, it depends on friction and pulley efficiencies. And rope diameter (essentially friction) ARE WE BUILDING OUR Z_RIG WRONG: th-cam.com/video/sIMFvf_E5Y8/w-d-xo.html FRICTION: th-cam.com/video/uq7AhJYXOQ4/w-d-xo.html REAL WORLD MA TESTED: th-cam.com/video/vD9SzJsan5Y/w-d-xo.html You are correct on that 10:2 on the simple system. Only when viewed as a separate system though. Then that 10:2 would be the same as 5:1 because you need double the input. It is essentially the same. I used the separate drawing as a clearer example in the larger inline system. Sort of like a zoomed in view if you will. I touched on a 2x input in one of the previous quizzes I did in another video. I used a TTRS as an example but it is basically the same thing. I think it was the quiz at the end of the COMPOUND video. The answers will be in the COMPLEX video though. In this inline 19:1 system where the 2T input is generated by a pulley and where that same 1T travels on to meet a rope clamp, that 10T and 8T are multiplied units of Tension. Or I could say that the initial input is 1T in the inline system. Not 2T. So as a separate simple MA you are correct, just not in the grand scheme of the inline system. Does that make sense? My mind is foggy, working through the night is not good for clarity haha.
hello, newbie here ! when you rig to the load, the pulley system is a odd number like 3:1, 5:1 or 7:1, if you rig from an anchor it's becoming an even number like 2:1, 4:1, 6:1, etc... am i right ?
That only holds true for a simple pulley system. The moment we start adding things on to it everything changes.. I suggest you watch all four video's starting at SIMPLE then COMPOUND and the COMPLEX. That should bring you up to speed fairly fast.
None of this is written out in any IRATA or WOH course that I know of. There are a few rope rescue manual that touch on this. But I lend them out a few years ago and never got them back.... I forgot the names....
Mmm..I don't know because I tried to calculate imagining having the load at the bottom. but if I calculate the upper advantage of the hoist, I get 27:1 in both cases😅 The problem is that I'm not sure that my calculations are exact, so I was looking for confirmation😆 Anyway, thanks so much for all the videos you make! You are super!!!🙏🏻
Maybe your logic is true BUT your CAPACITY TO EXPRESS THINGS SEEMS a lost battle... You cud hardly explain things comprehensively... only you , guess, is getting what you mean.
🤣 oh man you are funny. The amount of compliments I have gotten about this series of video from people who said that this finally made them get it far outweigh the negatives. I think you are the first who does not get it haha. I do wish to help you understand though. Where do you stop understanding what this is about?
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Leave a link to the hardest MA you have found on the internet and lets see if we can solve that now
Love the way you said the unit of tension keeps travelling through the system until it meets a knot, anchor or rope clamp. Very clear explanation, awesome knowledge and teaching bro!
Thank you :-) Glad it was helpful!
Thanks for the videos I enjoyed them always, because rope access is my career.
That is awesome!
thank you
You did it perfect and simple Alex, Thanks
Glad you liked it! Thank you 🙏😀
Outstanding video, Alex, thanks for all your contributions. ❤️ 👍
My pleasure!😀🙏
Another great video. Keep them coming.
Thanks, will do!😃🙏🏼😃
In the french rope industry, we call the "crevasse system"..."mariner system "
Another great explanation! Thanks Alex
Good to know 😃 Thanks Sori🙏🏼👊🏻
Great content! This method it's very easy to understand!
You could add the estimate percentages on force loss by friction (based on the tests you did of the different devices and pulleys,
That could calculate pretty closely the force needed to lift certain amount of weight.
Absolutely!👍
Thank you
Very good video, I like how following the “T” whether it is 1 or 2 through all ropes is articulated.
Glad you liked it!😀👍🙏
Alex, that’s made my head hurt!
Usually when you start to put pen to paper and write it out, it will start to make sense.
Great stuff! is this something you will be learning in IRATA LV1 Course?
Usually not. For IRATA L1 you only need to have an awareness of how a basic hauling system works. Sometimes when someone comes in at a higher level and there is time and interest, we get into it. Usually not though.
How realistic are these ratios? Friction? Pulley efficiencies?
15:55 Shouldn't it be a 10:2 (output over input) which is essentially the same as a 5:1 just that you don't come in with 1?
This is all for Ideal Mechanical Advantage and might not even be close to an Actual MA. I did a few video's on that as well. Like you said, it depends on friction and pulley efficiencies. And rope diameter (essentially friction)
ARE WE BUILDING OUR Z_RIG WRONG: th-cam.com/video/sIMFvf_E5Y8/w-d-xo.html
FRICTION: th-cam.com/video/uq7AhJYXOQ4/w-d-xo.html
REAL WORLD MA TESTED: th-cam.com/video/vD9SzJsan5Y/w-d-xo.html
You are correct on that 10:2 on the simple system. Only when viewed as a separate system though. Then that 10:2 would be the same as 5:1 because you need double the input. It is essentially the same. I used the separate drawing as a clearer example in the larger inline system. Sort of like a zoomed in view if you will. I touched on a 2x input in one of the previous quizzes I did in another video. I used a TTRS as an example but it is basically the same thing. I think it was the quiz at the end of the COMPOUND video. The answers will be in the COMPLEX video though.
In this inline 19:1 system where the 2T input is generated by a pulley and where that same 1T travels on to meet a rope clamp, that 10T and 8T are multiplied units of Tension. Or I could say that the initial input is 1T in the inline system. Not 2T. So as a separate simple MA you are correct, just not in the grand scheme of the inline system.
Does that make sense? My mind is foggy, working through the night is not good for clarity haha.
@@TheRopeAccessChannel Thanks for the response and stealing an other hour of my life (the videos you referenced are exactly what I expected)
@@ralfrussel1950 😂👍🏼
hello, newbie here ! when you rig to the load, the pulley system is a odd number like 3:1, 5:1 or 7:1, if you rig from an anchor it's becoming an even number like 2:1, 4:1, 6:1, etc... am i right ?
That only holds true for a simple pulley system. The moment we start adding things on to it everything changes.. I suggest you watch all four video's starting at SIMPLE then COMPOUND and the COMPLEX. That should bring you up to speed fairly fast.
Очень интересно, но вряд ли когда пригодиться! )
English please
Are there any books on the iratra/WOH parts u could recommend?
None of this is written out in any IRATA or WOH course that I know of.
There are a few rope rescue manual that touch on this. But I lend them out a few years ago and never got them back.... I forgot the names....
But why at 8:35 the calculation comes to me like 26:1 the first and 28:1 the second? What do I wrong?
Probably the difference between the first SOF pulling direction.
Not sure. I posted this a long time ago haha
Mmm..I don't know because I tried to calculate imagining having the load at the bottom. but if I calculate the upper advantage of the hoist, I get 27:1 in both cases😅 The problem is that I'm not sure that my calculations are exact, so I was looking for confirmation😆 Anyway, thanks so much for all the videos you make! You are super!!!🙏🏻
The answers are what I gave. Just start with T1 and draw it out, it should become clearer then
8:54 I need to know the answer. I’m not telling you my answer (guess) because I’m new to this.
That is all on the website
Did you find it on the website? I tried but I'm not sure 😅 504:1 😂
Maybe your logic is true BUT your CAPACITY TO EXPRESS THINGS SEEMS a lost battle... You cud hardly explain things comprehensively... only you , guess, is getting what you mean.
🤣 oh man you are funny. The amount of compliments I have gotten about this series of video from people who said that this finally made them get it far outweigh the negatives. I think you are the first who does not get it haha. I do wish to help you understand though. Where do you stop understanding what this is about?