@forrestthornhill8141 5 жыл бұрын
I really enjoy all the reviews and videos that you produce. I would like to add to what you were talking about when it comes to angles and loads. As a crane operator, we have to go through extensive rigging classes. When an angle that goes from the static point (working end) to the load attachment points (be it two points, three points, or four points) if that angle becomes 30° or more (spread out, not closed in) those anchor points now carry 100% of the load weight, regardless of how many attachments.
@GearGarageTV 5 жыл бұрын
Thanks for the nice comment - I'm so glad you like the videos! I'm having a hard time visualizing your comment. Here's a chart (www.ropebook.com/information/vector-forces) that demonstrates that if the angle between the 2 ropes is 120 degrees then the load on each anchor point is 100% of the main load.
@Meowbox9000 3 жыл бұрын
@@GearGarageTV I looked at book you referenced and I'm having a really hard time wrapping my head around the large angles if I suspend a one ounce weight on a rope and pull it tight 180 degrees wouldn't that be impossible as the force that one ounce exerted would be infinitely forceful. Or is there always a minut angle shift so it is not infinitely forceful.
@GearGarageTV 3 жыл бұрын
@@Meowbox9000 Yes you are right - there will always be a minute angle. Since the force is theoretically infinite, it will cause a small deviation. Try it some time with a large weight - it's really hard to get those last few degrees as the forces increase exponentially as you approach 180 degrees.
@MartyZaluski Жыл бұрын
Thanks for sharing your knowledge so us privateers have a safer run!
@GearGarageTV Жыл бұрын
You're welcome!
@seanfraser7738 3 жыл бұрын
Nice! That's advanced 'ropecraft', throwing in a twist in the pulled up webbing loop. Nice job Zach!
@returningtoearthtv8836 2 жыл бұрын
A great anchor that will not blow is the entire tube. Thread your webbing through the floor and sling the entire tube. Not sure how one might create a self equalizing system from two slung tube anchors but that would be bullet proof. The dangers of d-rings blowing is real. They fly like bullets as do all the carabiners and pulleys. Wear your helmets and put life jackets on the static line when under load to soften any exploding anchor scenarios. Thanks for the video Zach!
@dinosnow1 2 жыл бұрын
Your KZfaq channel is priceless thank you for sharing all your knowledge👍
@GearGarageTV 2 жыл бұрын
I appreciate that!
@aboveallholidaylighting9305 4 жыл бұрын
figure 9 and 2 carabiners will let you do this on the working end of any rope, climbers use this to fix ropes at the top of climbs with 2 bolts (2 d rings in your case) vector forces are real. slings are nice when you have them but good to know how to use the rope
@debcarpenter74 3 жыл бұрын
I studied this video carefully and decided to try this when using my trailer winch -- used the two front quarter D rings instead of the single bow D ring -- made it so the angle was small, used tubular webbing. Only did it a few times -- I really don't like to use the winch (pressure), but sometimes I don't want to impose on my elderly passengers to help lift the raft!. I noticed recently that the fabric that wraps around one of the front quarter D rings is torn about 1/4 of the way (tear beginning at back). It is a light weight, premium boat, only 14', only tried this on day runs, no cooler, 6 years old, but never stored outside (UV). Irony, huh, trying to protect the bow ring and hurting a different one! I would be happy to take one of your used Sotars in compensation! But seriously, maybe I need a three point anchor. Or attaching the winch to the frame may be a better idea, but the front tube blocks that -- though have not tried that yet. Hate that winch! (BTW, took class III school in 2014.)
@hughkillebrew6711 3 жыл бұрын
if you have a roller on your trailer make a y strap out of 1 inch tubular webbing that goes slightly under the bow of your boat then to your frame around the oar towers to a cross bar.. it works fantastic as the part under the bow helps lift the boat and being to the frame it pulls on all your d rings that you attach your frame to and not just 1 or 2 points on the boat
@coleslaw7000 5 жыл бұрын
this was super helpful thx
@GearGarageTV 5 жыл бұрын
Great to hear! Thanks for the comment.
@shewhowatches 2 жыл бұрын
I see, the point is that the force on a D-ring is reduced by distributing the full pulling force to two or more points. So pulling with 100# at a 45 degree split puts about 54# on each of two D-rings, rather than 100# on one D-ring. The boat is still being pulled by 100# and 50# to each point, and about 4# of extra 'stress' caused by pulling the D-rings toward each other.
@GearGarageTV 2 жыл бұрын
Yep that's a good way to think about it. The further away the D-rings are, the more extra stress there is. Check out this video kzfaq.info/get/bejne/jpaDg5tmuJfRZIU.html.
@shewhowatches 2 жыл бұрын
@@GearGarageTV That is an interesting video. Basically if the angle is 120 degrees or greater, you're not doing your D-rings any favors by distributing to them. You pull with 100# and each D-ring experiences #100 of stress. But the overall pull on the boat is still just 100#. So don't do that. 😉
@GearGarageTV 2 жыл бұрын
@@shewhowatches Yes above 120 degrees you're making things worse. The goal is to minimize the angle and I try and avoid any angle over 90 degrees.
@joshkelly3743 3 жыл бұрын
That anchor is called a magic x in climbing terms
@CerebralStorm 5 жыл бұрын
We run oar rafts and attach the line to the frame effectively attaching to 4-6 D-rings. Is there any reason that is not a good idea?
@ZacharyCollier 5 жыл бұрын
Yes I mainly run oar rafts too. Attaching to the frame definitely has some advantages, which are (1) simplicity and (2) being attached to many d-rings at once. In theory, it seems brilliant. In practice, when you pull on the frame there is some give so the pull of the rope isn't entirely directed to the boat. The boat is stuck, so it will usually work better to pull directly on the boat. If you pull on the frame you'll find that the frame moves within the boat but the boat moves very little or maybe not at all. If this does work you'll find that the frame has shifted in some tough to handle ways and may need to be un-rigged and re-rigged after you get the boat unstuck. Your suggestion would work in some circumstances, but in general I'd suggest attaching to 2 or 3 d-rings. If it's a big, heavy gear but then use 3 d-rings. I have used a 3 point self equalizing anchor with 2 d-rings and the frame and that worked great. In fact, that's what we did on the thumbnail image of this video. Any thoughts?
@downtowndusky 4 жыл бұрын
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