Two Rope Tension System A-Frame Resultant Insight, Part 1

Written By: Lance Piatt

Excerpt from "A Guide to Artificial High Directionals & Two Tension Rope Systems"

Defining a resultant is what determines if your high directional is going to be stable or not. So when we say resultant, the full term is a resultant vector. A vector is a measure of force and direction. Here, we’re talking about resultants through the head pulleys. This is what’s giving compression and pulling down on our frame making it stable, so we know that force in and out of a pulley is going to be the same on either side.

We don’t need to worry about the magnitude or the amount of force in our resultant, we just worry about direction. We want the direction — that resulting vector — adding these two forces together to fall somewhere within the footprint of our frame or our pod. This keeps this compression pulling down and stable. In any system with just a single pulley through the head, we can always visualize that resultant is this line through the center of the pulley.

You’ll notice with the setup we have in the next video, if we were to step back, we would see that the two resultants are coming down and landing almost directly in the middle of our frame. That’s what keeps it stable. One of the more common ways it changes is when we use this for an edge transition; we have an attendant out there, the attendant steps back and up, they move these lines up, and that resultant swings forward towards the front.

5 Day Advance Workshop - Rigging Lab Academy

We’re always going to have some movement, but one of the ways we manage that movement and keep everything in compression and anchored to the ground is by adding tension with a guying system. The guying system we’re using is three points and is more or less equally divided around our frame, which is optimal. On a 360-degree circle, optimal is 120 degrees between each one.

We’ve used a Petzl Jag which is a set of 4s and an overall really really simple system. When you pull on it, it adds tension. On the other side, we’re using what’s called a voodoo or a transport hitch. This is just a self-adjusting tensioning system. On the backside, we used a very common non-working 3:1 and dog tied it off.

ENROLL YOUR TEAM TODAY ~ ESSENTIALS TEAM MEMBERSHIP or UNLIMITED TEAM MEMBERSHIP

We say it’s non-working because, at this point, we can’t pull on it, we can’t add tension, we have to untie it, and it doesn’t have any pulleys in it. It’s a very simple system but we want that friction that it offers us. We’re going to pull on it once, tighten it, leave it, and that’s the version of the non-working part. It’s still a 3:1 and would still function if we pulled it apart.

So there you have it! Three different guying systems that provide different ways of guying the opposing tension on the frame. They are all counteracting the compression and are designed so that the four vectors end up with a resultant falling right in the middle of our frame. That defines our stability here and later on in this course, we’ll move to a monopod or a gin pole. The difference there is when we don’t have the back leg, we don’t have that area to work with and our resultant needs to fall closer to the single pull.

If we had a tripod, this would open up a little bit wider and we’d have a big footprint in the middle for our resultant to land in. Just remember that a resultant needs to land within the space defined by our frame. If we have two legs, it needs to be in the middle.

 

Gear & Equipment We’re Using:

[thrive_lead_lock id=’51985′]Hidden Content[/thrive_lead_lock]

Peace on your Days

Lance

Categories

About The Author:

11 thoughts on “Two Rope Tension System A-Frame Resultant Insight, Part 1”

  1. Satta Matka Fix Number

    Satta Matka Live India’s #1 site which publish fastest results for Satta matka games, Kalyan Matka, Milan Matka, Gali Satta, Rajdhani Matka, Mumbai Matka, Kuber Matka, Supreme and Jodi Bazar matka since 2011.
    Satta Matka Fix Number

  2. 946503 779008yourselfm as burning with excitement along accumulative concentrating. alter ego was rather apocalyptic by the mated ethical self went up to. It is punk up to closed ego dispirited. All respecting those topics are movables her need to discover no end touching unpronounced. Thanks so significantly! 558663

  3. 118027 288902Likely to commence a business venture about the refers to disclosing your products and so programs not just to individuals near you, remember, though , to several potential prospects more via the www often. earn funds 287541

  4. 740576 865956 There is noticeably a bundle to know about this. I assume you produced certain good points in attributes also. 945729

  5. 809636 138671Your home is valueble for me. Thanks!? This web page is really a walk-via for all with the information you necessary about this and didn know who to ask. Glimpse correct here, and you l definitely uncover it. 553953

  6. 490332 971583Average In turn sends provides could be the frequent systems that offer the opportunity for ones how does a person pick-up biological, overdue drivers, what 1 mechanically increases the business. Search Engine Marketing 482452

  7. 649718 404537An intriguing discussion is going to be worth comment. I believe that you can write read a lot more about this subject, might properly certainly be a taboo topic but normally folks are inadequate to chat on such topics. To a higher. Cheers 1168

Comments are closed.