Mechanical Advantage Systems & Z-Drag for Whitewater, Swiftwater & Technical Rope Rescue

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Күн бұрын

Пікірлер: 14

@mrprecious1234 6 жыл бұрын

Wow, best video I've watched! Short, simple fantastic explanation of how pulleys work providing the mechanical advantage. Thank for taking the time to produce this video and sharing your knowledge. Bill.

@borealriver 4 жыл бұрын

Thanks so much!

@michaelodonnell5758 5 жыл бұрын

Best vid I've found by far!!Thank you thank you! Clear explanash & videography I show this before teaching it. 9 to 1 tho getting a wee bit carried away ther unless of course you're solo hauling some deep, heavy, booty from under the seas. But that's what friends are for.

@borealriver 4 жыл бұрын

Thanks for the positive feedback! Clear explanations are what we're going for. True: pretty unusual to use a 9:1 in river rescue...it's more common for vertical raising systems where one or two people are managing a 'haul' line.

@bowlineobama 11 жыл бұрын

Thank you for the video. It is easy to understand going from 3 to 1 to 5 to 1 to 9 to 1.

@borealriver 7 жыл бұрын

Awesome. Thanks for your comment!

@hewagoda 6 жыл бұрын

very good explanation..thanks

@janew326 9 жыл бұрын

Thanks very much for the clear and helpful video. This made the z-drag easy for me to understand.

@borealriver 7 жыл бұрын

Thanks Jane. We're glad the videos are helpful to you.

@svenjohnson54 Жыл бұрын

This is a great video thanks for sharing. How much cord (untied) do you usually start with when tying a prusik?

@borealriver Жыл бұрын

Around 1.2m is a good length because you could use it for multiple applications and adjust the tail lengths depending on how big a Prusik loop you want

@BryanHansen 7 жыл бұрын

At 5:1 are you exceeding the limits of that 6 mil prussik?

@borealriver 7 жыл бұрын

Hi Bryan, it all depends on how much force you pull with. We often use these prussiks in 5:1 systems and greater. Also: in theory the 3-wrap prussik would slip before it breaks

@borealriver 6 жыл бұрын

Hi Bryan. Usually not. But it would depend on how much force you pull with. We use 6mm cord for our prussiks most of the time.