This video demonstrates how to build a “theoretical” 3:1. I do not take into account the factors of friction and pulley efficiency. If you are a physics major, this is not the video for you. You are not my target audience
All these experts yet here they are looking for instructional videos... Dude, thanks for the video, I could already do 3:1 but this is just so much cleaner than mine!
alejandrososa
Finally found the video. Saw my foreman make one of these as I’m new to tree work and we pulled whole trees over with this system. It was impressive.
jameshersom
1:43 with a longer rope.. instead of the prussic/rope grab on a carabiner..
Could you not just run the carabiner straight to the load?
Maybe add another pulley on it?
bmint
Can you make a playlist of your MA videos? I often watch them for reference as a beginner. Thank you!
jstretch
I would really appreciate if you could do a video explaining mechanical advantage from a climber's perspective. Like when the load does the hauling. For example, when a climber is the load, is climbing SRT, and creates a 3:1 haul back system how does this follow the rule that, if it is odd the line will be terminated at the load? I really think you do an excellent job explaining MA and was just curious if you could explain it from the climber's perspective...Thanks.
arboricole
The point of the prusik is to stop the load from dropping right?
ragepotato
This is the same as truckers hitch but with prusik and pulleys😁
southern_merican
That prusik is not necessary. Just create a figure of eight or butterfly loop and hock a carabiner.
TemplarX
If you pull three feet of rope through that system, the tackle will move eighteen inches. It's a 2:1 set up, the final turn is only a redirect. Measure the pulled rope and the distance that the tackle moves and see for yourself - dont just take my word on it.
daxdax
After more research, im basically certain @Dee H. is correct and this is a 2:1 with a redirect.
The cool thing is, this can be magically turned into a 6:1 by adding only one more pulley on a prusik (another traveling pulley). On the setup you have at 3:24, it would be called a drop C plus a Z
