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One thing people get wrong with snatch blocks - explained

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  • Опубліковано 3 вер 2020
  • #snatchblock #winch #doublelinepull #recovery
    One of the biggest difficulties people have in understanding winching loads is how a snatch block can double the force on an anchor. How, they ask, can you "create weight" ? I used to explain this with a whiteboard, but there was always one or two people who refused to believe the numbers. So I put together a little kit to physically demonstrate the point using scales and a volunteers from the audience. Nobody argued with the point then, and it was mildly amusing to see their mental cogs shifting without a clutch!
    Anyway watch for the answer. Also includes information about how to calculate load on a slope.
    Post questions as comments!
    Follow me on Facebook:
    / robertpepperjourno
    Support me on Patreon:
    / l2sfbc
    Buy my books:
    l2sfbc.com/whe...

КОМЕНТАРІ • 194

  • @kenerickson4851
    @kenerickson4851 3 роки тому +69

    This is so interesting because it shows how common sense needs to be learned / experienced. My opinion: Very well done!

    • @L2SFBC
      @L2SFBC  3 роки тому

      Thanks! Please share etc

  • @stevegoodwin5841
    @stevegoodwin5841 2 роки тому +9

    None better explanation out there Robert in spoken word and demonstration. Thanks again.

    • @L2SFBC
      @L2SFBC  2 роки тому

      Very welcome, thank you!

    • @dustbustr91
      @dustbustr91 26 днів тому

      ua-cam.com/video/ra5KqnESPOo/v-deo.html

  • @chriscraig70able
    @chriscraig70able 2 роки тому +14

    Like A BOSS !!!! ...this is , precisely, why I watch your videos . Simple explanations , physics applied . No nonsense , straight to the point. Thank you 🤓

    • @L2SFBC
      @L2SFBC  2 роки тому

      Thanks, please share :-)

  • @johntowe9102
    @johntowe9102 3 роки тому +12

    Ha ha love it 👍 so many people think they know facts when they don’t, love your work, what you explained is basic engineering that most people can’t comprehend, I get it every day, good work 👍

  • @kathyl67
    @kathyl67 Рік тому +8

    Well demonstrated and you made it easy to understand. Good job Robert !

  • @zaccheus
    @zaccheus 7 місяців тому +2

    Fantastic demonstration! In the arboriculture world, we use a sling with twice as much capacity as our rigging line whenever we are lowering pieces out of the tree.

  • @talkingcargojunkremoval
    @talkingcargojunkremoval 3 роки тому +3

    This is what UA-cam is for ...LEARNING. I move bales of cardboard onto a utility trailer with a winch. This information is what I need. I'm reading all the comments and I know that I'm among well qualified people who know what they're doing and talking about. #Respect

    • @L2SFBC
      @L2SFBC  3 роки тому +2

      Thank you!! Always good to hear from non-4x4 industries so we can all learn!

  • @lesszabo5625
    @lesszabo5625 3 роки тому +9

    Very good points, a lot of people have a hard time with this type of winching, lifting or otherwise similar actions. I learned in my apprenticeship on rigging and lifting very heavy loads just this very important knowledge.

  • @nickjennings8317
    @nickjennings8317 4 роки тому +11

    I really liked physics as a kid at school. This is the point that really used to se
    crew with my logic.Still does some times. Very well demonstrated Rob. Thank you

    • @L2SFBC
      @L2SFBC  4 роки тому +6

      It screws with everyone. That's why I started to use physical weights and scales when I ran classes. Otherwise, someone would refuse to believe. And no amount of whiteboarding would convince.

  • @pat9125
    @pat9125 10 місяців тому +2

    The stupidity of some people knows no bounds. Your information is so helpful and I'm grateful not only for your content but also that you don't let the pompous idiots distract you from putting out great content.

    • @L2SFBC
      @L2SFBC  10 місяців тому

      Thank you

  • @CliveWebbAustralia
    @CliveWebbAustralia 2 роки тому +2

    Excellent... I have told this to countless people over the years, but I'm not sure they get it. I explain by saying that, not connecting back to the vehicle means that, the cable is basically still a single line pull with a bend in it and if is creating resistance friction. Only when it is connected back to the vehicle, can the returned line contribute to carrying the weight. They say " I little knowledge is dangerous" I think in this case, at least detrimental to the task. Your demonstration is excellent. thank you...

    • @L2SFBC
      @L2SFBC  2 роки тому

      Thanks! And agreed 👍

  • @mudpuddle8805
    @mudpuddle8805 4 місяці тому +1

    That is so counterintuitive. I needed to see it to believe it!

  • @patrickbuick5459
    @patrickbuick5459 3 роки тому +6

    Great demo. It shows where the loads are multiplied and need higher rated gear.

  • @darrenwade9823
    @darrenwade9823 2 місяці тому +1

    The last minute is gold!

  • @toastrecon
    @toastrecon 10 місяців тому +3

    Lol. I had to watch this like three times to believe what I was seeing, and I even studied this at university. It has been more than a few years...

    • @L2SFBC
      @L2SFBC  10 місяців тому

      Did you believe it in the end?

    • @toastrecon
      @toastrecon 10 місяців тому +1

      @@L2SFBC Ha. Yes. If you draw out the "free body diagram" like you did, it works out. Makes me want to take a closer look at some of the replicas of those old massive sail powered warships - all lines and pulleys and winches and the like.

  • @horseshoe182
    @horseshoe182 Місяць тому +2

    i don,t understand why the weight increases, great video.

  • @MrFuel2burn
    @MrFuel2burn 10 місяців тому +1

    Just found your video series. Very impressed! Practical demonstrations making this very easy to understand.

  • @flintindustries
    @flintindustries 3 роки тому +7

    I am going to be using a pulley system in my rocket now, your video along with SmarterEveryDay's video greatly helped me. Thanks a ton for these great videos!

    • @L2SFBC
      @L2SFBC  3 роки тому +3

      Rocket??? Tell me more...

  • @johncunningham4820
    @johncunningham4820 Місяць тому +1

    I hope that " Commenter " paid attention here . I understood the first time it was explained in the Winching Video .
    Ever applied force requires an Equal counter-force to remain in balance . Basic Newtonian Physics .

  • @billnu
    @billnu 2 роки тому +2

    The mechanical advantage works against you. Mechanical disadvantage, because the way the pulley is set up. Cool video and thanks for showing it in such a clear way.

  • @DonzLockz
    @DonzLockz 10 місяців тому +1

    Excellent demo and info without all the fluff. Love it.👍🤠🇦🇺

    • @L2SFBC
      @L2SFBC  10 місяців тому

      Thanks 👍

  • @Kincentc
    @Kincentc 3 роки тому +5

    I find it interesting that most folks know you can double the force on a moving object with a dual line.... But they cannot comprehend that it applyings double the load on the stationary object that's doing the levering. For every action ...

    • @L2SFBC
      @L2SFBC  3 роки тому

      Nicely put!

    • @whermanntx
      @whermanntx 2 роки тому +1

      People are confusing line tension with force on the pulley.

  • @Mike_Costello
    @Mike_Costello 4 роки тому +16

    The deepest part of his rather inane remark has not been tackled. Why do you not have more views???????🤣😂 Because this stuff is cool!!! You need to figure a way to add a snatch block to the UA-cam algorithm.

  • @ridermak4111
    @ridermak4111 2 роки тому +1

    Great demonstration !
    Lots of opportunity for confusion in pulleys because of exceptions to the rules. This one is a good example. It breaks the rule…….only moving pulleys provide mechanical advantage.
    Exception: when the haul line power source is attached to (or part of) the load.

  • @natashanagy1117
    @natashanagy1117 3 роки тому +3

    Robert, thanks for the videos! I just want you to know that I personally get rather excited watching your videos, especially the snatch box ones😉

    • @L2SFBC
      @L2SFBC  3 роки тому +2

      Good to hear and pleased my work creates that sort of emotion...few are excited by what I do, perhaps more satisfied with the learning.
      Maybe you need to watch more videos as I explain snatch blocks - snatch boxes are indeed an interest but not a subject I'll explore on this channel 👍

  • @jimderrick846
    @jimderrick846 3 роки тому +2

    Fantastic information Robert, Thank you very much!!

    • @L2SFBC
      @L2SFBC  3 роки тому

      Thanks please share etc!

  • @silverclouds3725
    @silverclouds3725 Рік тому +2

    Well, that freaked me out. I gotta sit down and think that through!! 😁😁

    • @L2SFBC
      @L2SFBC  Рік тому +1

      Well that's better than the people who say "no, that is wrong, it's trickery" !!!

  • @DiHandley
    @DiHandley 3 роки тому +2

    You have an excellent channel with a very bright future! Keep it up.

    • @L2SFBC
      @L2SFBC  3 роки тому +1

      Thank you so much!

  • @helmydewa
    @helmydewa 2 роки тому +1

    Wow, nice explanation... Now i know why my rope breaks, because i use wrong configuration... I am subscribing now, very nice info, i use this when i play my RC and using winch...

  • @akbarshoed
    @akbarshoed 5 місяців тому +1

    Brilliant! This is what UA-cam is all about!

    • @L2SFBC
      @L2SFBC  5 місяців тому +1

      Yes I'm sure it's exactly what the founders had in mind :-)

  • @Unsensitive
    @Unsensitive Рік тому +2

    Anchor points increasing load was the biggest issue for me to wrap my head around.
    Eventually, I just had to accept my common sense was incorrect and re-train my brain to take this into account.

    • @L2SFBC
      @L2SFBC  Рік тому

      Thanks for being open-minded. How could I have done better to explain?

  • @rudiblackrahmadi
    @rudiblackrahmadi 3 роки тому +1

    i know my comment is way too late... but it is a cool demonstration never the less..
    well done & thx you

    • @L2SFBC
      @L2SFBC  3 роки тому

      Not too late! I appreciate it! Please share 👍

  • @AustralianoffroadacademyAu
    @AustralianoffroadacademyAu 4 роки тому +5

    Nicely demoed.
    LEGO fixes everything. 👍

  • @lewy1
    @lewy1 3 роки тому +2

    The simplest way I was taught if the block moves there is a mechanical advantage and in simple terms the number of lines coming out if the moving block is your mechanical advantage.

    • @L2SFBC
      @L2SFBC  3 роки тому +1

      No, you can have MA if the block doesn't move, and it's the number of lines supporting the load, not coming out of the block.

    • @lewy1
      @lewy1 3 роки тому +1

      @@L2SFBC The amount by which the pull on the hauling part is multiplied by the tackle is called its mechanical advantage (M.A.) and, if friction is disregarded, this is equal to the number of parts of the fall at the moving block.

    • @kenbrown2808
      @kenbrown2808 3 роки тому +1

      @@L2SFBC the better phrasing would be if the block moves in relation to the other components in the rig.

    • @L2SFBC
      @L2SFBC  3 роки тому

      Very good!

  • @valkry007
    @valkry007 2 роки тому +1

    well demonstrated Sir.

    • @L2SFBC
      @L2SFBC  2 роки тому

      thanks please share!

  • @joerivs80
    @joerivs80 3 роки тому +2

    Such great info!

  • @jonroberts9112
    @jonroberts9112 Рік тому +1

    If you look at the distance the vehicle moves, its exactly the same as the amount of rope taken in. No mechanical ad.
    And yes, you do need a moving pulley

    • @L2SFBC
      @L2SFBC  Рік тому

      l2sfbc.com/you-can-get-mechanical-advantage-from-a-snatch-block-that-doesnt-move/

  • @SGTMinguez
    @SGTMinguez 7 місяців тому +1

    So the redirect pulls are more strenuous on the winch than the double line back to vehicle pulls. Interesting. I think I'll get another pulley to carry.

  • @sjlouvieify
    @sjlouvieify Рік тому +1

    Good presentation!

    • @L2SFBC
      @L2SFBC  Рік тому

      Glad you liked it!

  • @ronitsingh85
    @ronitsingh85 2 роки тому +3

    damn, I knew force doubles because of the 180 change in direction of the force vectors but I would have assumed that in both causes it would double! So in redirect situation, one can pull a much heavier vehicle without anchoring your vehicle as long as the heavier vehicle is not less than twice the weight of your vehicle. It makes sense that the pulling weight at the snatch block would double since one point is fixed and you have an action and reaction forces that add up. you have the 1000 kg force traveling from the 1000kg truck all the way to the fixed point on the ground, cable tension = 1000 kg BUT around the snatch point it changes direction, thats where it adds up. Just mind boggling to think you are creating double the force from nothing, right? I don't blame the lady 🙂. With double line since both the fixed points are on the truck itself, the weight of the truck is split equally and the tension the line feels is 1/2. Here you are basically doubling its capacity at the expense of speed.

  • @ricqik
    @ricqik 7 місяців тому +1

    I'm trying to wrap my head around how the weight doubles.

  • @MutsFire
    @MutsFire 3 роки тому +5

    I think my head is about to burst, especially when you put the lego car in a slope

    • @L2SFBC
      @L2SFBC  3 роки тому +5

      Please subscribe before your head bursts

    • @MutsFire
      @MutsFire 3 роки тому +3

      You'll have to make new content then because i just watched thru all your pulley clips. Almost like being on a whole day seminar 🙈😀 👍🏻👍🏻 learned a lot //32 year old plumber

    • @L2SFBC
      @L2SFBC  3 роки тому +4

      Stay tuned...

  • @Naluukti
    @Naluukti 3 роки тому +2

    The difference between force and mass! You add no mass to the line, but double the pulling force!

  • @teamidris
    @teamidris 3 роки тому +1

    Mega important to keep the pulley bearings greased. The old boys said you loose 5% on every pulley, which is a legit good guess due to friction. They also said that pulling a machine up 45 degree slope is pretty much the same pull as it’s mass. (After 45 the drag is gradually swapped for dead lift)

    • @L2SFBC
      @L2SFBC  3 роки тому +1

      Here's the efficiency loss -> ua-cam.com/video/rdlRRAbzCzA/v-deo.html

    • @teamidris
      @teamidris 3 роки тому +1

      @@L2SFBC the old boys knew right then :o) I wonder if a roller bearing snatch block does better? (Up until the bearing gets rusty)

    • @L2SFBC
      @L2SFBC  3 роки тому +1

      Watch the video..all explained and more tests on the way 👍

  • @teropiispala2576
    @teropiispala2576 2 роки тому +2

    I see a risk of people getting this wrong. If you are pulling external load attached to snatch block, other end don't need to be attached on solid object. It can be attached to the vehicle and the force is still doubled. Of course if you use solid object, you vehicle needs only half of the force to anchor it into place.

  • @Mike-fx4jn
    @Mike-fx4jn 5 місяців тому +1

    This is great thank you. I watch a lot of your videos and try to study them....given this logic it makes me wonder, why bother doing a redirect if you're not getting a mechanical advantage? Why not just hook right to the first anchor point? I suppose it could help to get to lower levels of the rope which produces more power from the winch.

    • @L2SFBC
      @L2SFBC  5 місяців тому

      Good question and there's no point unless you need to change the direction of the pull.

    • @Mike-fx4jn
      @Mike-fx4jn 5 місяців тому +1

      Very interesting. You see people often using snatch blocks and seperate anchor points claiming it provides and mechanical advantage but these seems to disprove that. Other than getting more line out of the winch and working a lower layer it just doesn't seem worth it unless you can hook back to the vehicle

    • @L2SFBC
      @L2SFBC  5 місяців тому

      Depends if you are winching or being winched

    • @Mike-fx4jn
      @Mike-fx4jn 5 місяців тому +1

      Good point , I'm always thinking of self recovery but now that makes sense, if involving another vehicle

  • @maxgood42
    @maxgood42 10 місяців тому

    To undertand the forces here think about this.
    Attach the snatch block to the rear of a Towing Car (Car A).
    Don't Actualy Do This, Only In Your Head. You will FAST understand why.
    If both ropes are connected to the car being towed then the setup is the same as a single line pull (Car B)
    Energy Needed to move Car B 1kmh = 1 x E
    Now connect one rope to a Tree next to Car B
    If Car A travels at 0.5kmh then Car B will travel 1kmh
    Or if Car A travels at 1kmh then Car B will travel 2kmh and Car B will be getting 2 x E. Also here the Tree is also working at 2 x E
    And Car A and Car B will combine to become the latest viral video.
    So if Car A wants to stop Car B from reversing, Car A now needs 2 x E brakes to stop Car B reversing
    Because Like the Winch setup, (Car B has a Winch) and now only needs half the Energy to pull Car A in reverse.
    Car A = Car B + Tree
    The Pulley on the Ramp is giving the Toy Car a 2:1 advantage to pull on the Scale with so the scale reads 2 x Toy Car.
    And this is how to better understand what E=MC2 Actualy means.
    E = Speed of light, M = Car B, C2 = Winch Wired to a Dwalf Star Held inside a TARDIS.

  • @ColinRichardson
    @ColinRichardson 4 роки тому +5

    Don't worry Robert, I am a complete noob with snatch blocks these types of things and all the terminologies..
    But physics are physics.. It's not "weight" it's force applied.
    Just because it is not obvious to the mystery complainer watching it, doesn't mean the teacher is wrong, it means their understanding is not complete yet.
    Sadly he is going to be incorrect forever if he has declared he is not going to watch another video.
    It's prob one of the reasons he is so wrong in the first place.. He never stuck around long enough to be taught correctly..
    He is now going to go to another video about another subject and tell them they are wrong and he will stop watching their videos also..

    • @ColinRichardson
      @ColinRichardson 4 роки тому +1

      If you wanted to help visualise it even more, you could add a weighing scale to the "stump" too, and show there is a force pulling it towards the snatch block.

    • @L2SFBC
      @L2SFBC  4 роки тому +3

      Yep, could do that too...but I'm trying to balance my videos (and content) with accuracy vs brevity and ease of understanding. So I use kilograms rather than newtons, and often talk of 'drive' to wheels rather than torque.
      Always welcome feedback as to how I can get the balance right 80% of the time for 80% of the people.
      I find the people who know the difference between mass and weight for example don't need any explanations!!!

  • @davidgates1122
    @davidgates1122 3 роки тому +3

    Best setup is to attach the snatch block to the vehicle being recovered and run a buddy's winch through it to an anchor.

    • @L2SFBC
      @L2SFBC  3 роки тому

      Why is that best?

    • @davidgates1122
      @davidgates1122 3 роки тому +1

      @@L2SFBC All of the wear and tear is on his equipment!

    • @davidgates1122
      @davidgates1122 3 роки тому +1

      Joking aside, the force applied to the anchor is half of that that would be applied by attaching the snatch block to the anchor and running the cable back to the vehicle being recovered. I prefer to have the pull capacity of the winch to be the weakest link. That way I don't have to worry about cables snapping, shackles breaking etc. I don't exceed the working load limits of these components (I can't because the winch capacity is less than the working load limit). The problem is that I have yet to find a tree with the working load limit posted on it. So if I can figure out a way to halve the load on the tree, I think that is better. You can also use another vehicle as the anchor point, using recovery points on it whose working load limit exceeds the capacity of the winch.

    • @L2SFBC
      @L2SFBC  3 роки тому

      Exactly I explain that in my winch rig videos and also the one I did with Mad Matt recently

    • @davidgates1122
      @davidgates1122 3 роки тому +1

      @@L2SFBC Mad Matt has some really good videos. For those that use snatch straps, watching the videos he did with Matt Winder in Utah using the ropes is rather eye opening.
      Another good set of videos to watch is the ones where Ron Pratt and his father recovered a U-Haul van from a fire road in a National Forest using the 3000 lb winch on his father's Polaris Ranger side by side. Ron does a lot of work with a rotator tow truck, including a lot of overhead work. He is highly trained and very safety conscious. Watching his rigging and his techniques for moving something the way you want it to go is very educational.
      Your video was excellent also -- it puts some real world data into it. I never appreciated how much the load on the cable can vary during the recovery and how fast it can change. It is those fast changes that could result in the failure of a component, even though the actual load on the component does not exceed its rating.
      Lesson learned: take it very slow and easy when working at the limits of the capacity of your equipment.

  • @liquidluck8594
    @liquidluck8594 8 місяців тому +1

    any advice on avoiding twists in the line when using a snatch block?

    • @L2SFBC
      @L2SFBC  8 місяців тому

      take your time and re-rig as required

  • @johnrobertson7583
    @johnrobertson7583 9 місяців тому

    You also didn’t explain that the increased force (weight) can only be achieved if the object being pulled upon is the source of the pulling force/ location of winch...

  • @trickymon
    @trickymon 4 роки тому +1

    Very interesting well done

  • @duoglide69
    @duoglide69 3 роки тому +5

    👍🏼👍🏼 funny thing is if you didn’t have visual add most of these naysayers wouldn’t know what you’re talking about. 🤯

    • @L2SFBC
      @L2SFBC  3 роки тому +1

      True!

    • @garyfornow542
      @garyfornow542 3 роки тому

      Great point. Goes to show how easy it is for people to believe what they want to believe and why it can be so hard to change their minds. Indeed it can be difficult to make a solid case and present it as clear as this example.
      These modern thinkers (woke type) are now even questioning the scientific method, etc... making it literally a10000% chance you will not be able to change minds because without it they wipe out the independent standards so nothing can be proven... scary!

  • @thepizza123
    @thepizza123 3 роки тому +4

    As far as vehicle winching, this video seems to miss the crucial point. The point of winching the vehicle with a snatch block back to itself is to reduce the load on the winch. And you've shown that the load on the winch is indeed halved. In fact, you've demonstrated that you should not winch from the vehicle to a second static object, because you are towing twice as hard on your winch point in front of you. So if it's a tree it's taking twice as much load as it needs to and the load on the winch is the same. Instead you want to winch from the vehicle to the snatch block at the tree back to the vehicle.
    Now if you're trying to tow a stuck vehicle in front of you you would absolutely benefit by going from your vehicle to the stuck vehicle to a solid tree.

    • @L2SFBC
      @L2SFBC  3 роки тому

      The point of the video is to explain exactly what you describe. See the other ones for more general explanations. I am not sure what your point is?

    • @thepizza123
      @thepizza123 3 роки тому +1

      @@L2SFBC Sorry, it felt to me like you were discouraging winching with a return to the bumper. I've watched your other videos and see that you meant this more as an add on. You have a great series and thank you for the excellent videos!

    • @L2SFBC
      @L2SFBC  3 роки тому

      Hi, yes I can understand that if you watched that in isolation. That was to address a specific point which comes up time and again - that merely adding a snatch block does not necessarily give 2:1 MA. It's been a popular video so far glad it's helping, and thank you for the comment!

  • @greengo7353
    @greengo7353 3 роки тому +1

    Strange that some people think otherwise. People are not paying attention on their high school experiments on forces I guess. The pulley there could be the culprit. People got conditioned on its "mechanical advantage".

  • @tpv59
    @tpv59 2 роки тому +1

    LEGEND.

  • @DuzBee
    @DuzBee 2 роки тому +1

    What I don’t understand - Why this is so? The distance between the two anchor points is on 1cm at most.

    • @L2SFBC
      @L2SFBC  2 роки тому

      Don't understand what?

  • @Brendan9300
    @Brendan9300 Рік тому

    Well said

    • @L2SFBC
      @L2SFBC  Рік тому

      Thank you please share

  • @lancecannon3660
    @lancecannon3660 3 роки тому +2

    So a redirect has a mechanical advantage if the anchor at the top is your mate that your trying to pull out of the muck

    • @L2SFBC
      @L2SFBC  3 роки тому

      Yes...but then it's not really a redirect. But you've hit on a really important point - the same rig works differently for MA depending on whether you're pulling someone, or pulling yourself.

    • @johnsullivan6709
      @johnsullivan6709 3 роки тому +2

      Not so much a mechanical advantage in winch rate, but an advantage in that you have effectively halved the pull on the recovery vehicle while keeping full pull on the recovered.

    • @kenbrown2808
      @kenbrown2808 3 роки тому +3

      @@johnsullivan6709 if you use the snatch block as the stuck vehicle, this is a very good way to phrase the demonstration.

  • @Remas-di7iz
    @Remas-di7iz 2 роки тому +1

    So which would be easier on a winch, to connect both points to the vehicle, or have one attached to an anchor (tree)?

    • @L2SFBC
      @L2SFBC  2 роки тому +1

      No difference

  • @crf450r23
    @crf450r23 2 роки тому +1

    How would the weight change on the pulley if the rope was anchored 90° from it? Would it see 50% less weight?

    • @L2SFBC
      @L2SFBC  2 роки тому

      A 90 degree change of direction adds 141% of the load onto the anchor point, as opposed to 200% if that helps? So yes a reduction.

  • @johnnysparkleface3096
    @johnnysparkleface3096 Рік тому +1

    I'm not getting the point of what you're saying because (I guess) I'm stupid. But I thought the point of using a snatch block is to make your winch not have to work as hard. So why are we focused on the amount of pull against the tree? In other words, why is the meter where it is instead of measuring the tension in the piece of rope connected to the winch? If I'm in a stuck car, I'd want to know if what I'm doing is making the winch's job easier or not.
    Another stupid thing I'd like to contribute is: since the snatch block doesn't move then it only redirects, so how the heck is attaching the other end to an anchor contributing anything to the situation the vehicle is in? As I understand it, using a moving winch is when the advantage happens. Have I learned everything wrong?
    Upon further reflection, maybe this is a demonstration of an incorrect setup. Because as I understand it, the moving winch needs to be attached to the stuck vehicle and this setup only pulls harder on the tree and does nothing to help the stuck vehicle.

    • @L2SFBC
      @L2SFBC  Рік тому +1

      You're not stupid. Understanding winching rigs means Understanding what not to do. And this is that, in response to a reader question. You can have a 2 to 1 advantages rig and thr block doesn't move check my other videos.

    • @johnnysparkleface3096
      @johnnysparkleface3096 Рік тому +1

      @@L2SFBC
      Thanks for that. I was beginning to wonder if I had it all wrong. Now I'm curious about the 2:1 advantage without a moving snatch block. I'll look for your videos on that. By the way, in addition to full size equipment, I recently bought miniatures like you use to demo your setups, including a couple of weight meters. I plan on working out setups and learning more. I don't know why this fascinates me, but it does.

    • @L2SFBC
      @L2SFBC  Рік тому

      2:1 is when you run the return line back to the car. Block doesn't move, but car does.

  • @michaeltowler2632
    @michaeltowler2632 3 роки тому +1

    I know nothing about blocks and such and interesting. I'm trying to get my head around . Does the wight /force change on the scales if you change the angle point angle ?

    • @L2SFBC
      @L2SFBC  3 роки тому +1

      Yes. The examples shown are a 180 degree direction change. For a smaller direction change, less effect. See here ua-cam.com/video/GXk4xCPkeco/v-deo.html

  • @essequamvideri
    @essequamvideri 3 роки тому +9

    buying stronger snatch blocks now

  • @north4961
    @north4961 2 роки тому +1

    Excellent videos! Could I use a 4500 lb rated winch for my Ram 1500 crew cab with snatch block?

    • @L2SFBC
      @L2SFBC  2 роки тому +1

      You could, but I'd go for at least a 9500lb if not 12,000

    • @north4961
      @north4961 2 роки тому

      @@L2SFBC 👍 thank you 🇨🇦 thought I could save some money with lower rated winch with a good set of snatch blocks. Thank you for you quick reply. I’m a new sub 👍🇨🇦

  • @drew79s
    @drew79s 3 роки тому +1

    Your commenter is right. The issue is that you're confusing weight and force. The reason (I suspect) is because of the imperial system measuring force in lbs.
    Anyway, to make clear the difference, something still has a mass when you're lifting it, even when it's not putting any force on the ground, and a vehicle doesn't double its weight when you run a double line pull, or half when you split a double line pull between the vehicle and an anchor.
    Anyway, I really enjoy your videos and hope that helps.

    • @L2SFBC
      @L2SFBC  3 роки тому

      Sorry I don't get the context of this? Yes mass doesn't change like weight, agree with your comment but don't quite see the relevance to the video? A double-line pull halves the effort (I prefer to say that rather than doubles the pulling power)

    • @drew79s
      @drew79s 3 роки тому +1

      @@L2SFBCthe commenter is quite correct. Weight is the force applied by gravity on an object. You can't change the weight of an object by doing anything other than changing gravity.
      A double line pull doubles the force, the weight remains the same. A scale is a force gauge, it's designed for the application of measuring weight and hence its units reflect that, but in the applications you've used it it's measuring force in an incorrect unit, not measuring weight.

    • @L2SFBC
      @L2SFBC  3 роки тому +2

      I know all that...maybe I used the wrong terms in the video. Which would have been intentional, I find if I talk newtons nobody gets it, so I use kg. Which isn't correct. But the people that know the difference tend not to need the explanation..hard balance to keep it simple vs accurate, and always looking for feedback to improve!

  • @AwosAtis
    @AwosAtis 3 роки тому +1

    Weight still was not created. Anchor point, or reference, merely changed. In either case, there is still equal weight on each line.

  • @jamesmckay9966
    @jamesmckay9966 2 роки тому +1

    You for got to explain that the further your two lines are apart reduces the mechanical advantage proportionally. I realize that you know that

    • @L2SFBC
      @L2SFBC  2 роки тому

      Good point shpuld have added that! But, only so much some minds can take at one go :-)

  • @kivamiesi
    @kivamiesi 3 роки тому

    If the block has lock to prevent it turning around, the load is just one time the weigth?

    • @L2SFBC
      @L2SFBC  3 роки тому

      Sorry don't understand the question?

  • @jadeb3391
    @jadeb3391 3 роки тому +1

    LEGO. Not just a kids toy.

  • @geoffgeoff143
    @geoffgeoff143 9 місяців тому

    Just basics we learn at school.

    • @L2SFBC
      @L2SFBC  9 місяців тому

      Not everyone

  • @adtfor
    @adtfor 3 роки тому +1

    What if the winch connected to the car's bumper (to itself)?

    • @L2SFBC
      @L2SFBC  3 роки тому +2

      Explained here:
      ua-cam.com/video/oBYa28i_K9Q/v-deo.html

  • @gregsmith1878
    @gregsmith1878 2 роки тому

    fantastic

    • @L2SFBC
      @L2SFBC  2 роки тому

      Thank you so much 😀

  • @coppcar
    @coppcar Рік тому +1

    Bueno!🎉🎉

  • @jorgezuni2818
    @jorgezuni2818 3 роки тому +1

    30” degree plus shackle might be the key to lighter weight.

    • @L2SFBC
      @L2SFBC  3 роки тому

      Sorry don't get that?

    • @jorgezuni2818
      @jorgezuni2818 3 роки тому +1

      @@L2SFBC Im trying to reason as my explanation. 30” angle elevation might be reason why vehicle might be lighter to winch with also the use of a ball-bearing snatch .

  • @normanweishaar3720
    @normanweishaar3720 3 роки тому +3

    When you know your s*** you know it

  • @michpatriot9097
    @michpatriot9097 2 роки тому +1

    Wow...

  • @jlofi000
    @jlofi000 7 місяців тому +1

    Newton third law

  • @dustbustr91
    @dustbustr91 26 днів тому +1

    this doesnt prove anything about increasing the pulling force of a winch. it only shows the distributed weight throughout the line.....

  • @jonathanpineda2774
    @jonathanpineda2774 3 роки тому +1

    You aren't increasing mass, you're increasing force. As in newtons, not kilograms

    • @jonathanpineda2774
      @jonathanpineda2774 3 роки тому

      Probably what confused the viewer

    • @L2SFBC
      @L2SFBC  3 роки тому

      Yes...should be newtons. But I use kg to make it more relateable

  • @garreysellars5525
    @garreysellars5525 4 місяці тому

    Thts not how i would put in use
    Attach block to the load
    Attach one end of rope,cable. To anchor
    Applly force to other end
    You will travel twice as gar as load but half the effort 😮

  • @alexk3088
    @alexk3088 9 місяців тому +1

    Yes, that commenter is wrong and the author of this channel is mechanically correct. They are still both semantically wrong. What is this "creating weight" nonsense? Weight is a measure of heaviness - it differs from planet to planet, even though an object has the same mass (which is a measure of inertness - in "weightlessness" objects are weightless but not "massless", but in most practical situations we tend to think of weight and mass as interchangeable, like speed and velocity). Pulley/block is one of "six simple machines" - a historic sign of civilization (along with "inventing the wheel"). To deny that pulleys provide mechanical advantage (aka "leverage") is to also deny wheel and axle, the lever, etc. And to deny human civilization. It is not "creating weight", or even changing it, it's merely splitting applied forces and sharing them across directions. Just like leverage. Words mean things, otherwise everything would be a dohickey or a whatchamajig.

  • @pinguzoe
    @pinguzoe 3 роки тому

    I feel sorry for those who need to be explaned...

  • @whermanntx
    @whermanntx 2 роки тому +1

    Your weight changed because you went from one line supporting the full load, to two lines supporting the full load, not because your angle changed. The correct test would be have an inline anchor not connected to vehicle.
    Now if your test was to see if a vehicle mounted wench makes a difference, then yes the anchor on the vehicle matters.

  • @johnrobertson7583
    @johnrobertson7583 9 місяців тому +1

    What’s confusing about your “explanation” is that you are not using the correct terms. The display of the digital scale is not showing weight , but force...it still only takes 5+ pounds of force to move a 5 pound object with a snatch block or off a single straight pull...the block just allows you to redirect it per convenient anchor point...

    • @L2SFBC
      @L2SFBC  9 місяців тому +1

      weight, force, mass, torque, power, load, work...these are all very specific terms engineers understand. The average person does not, so I often simplify.

    • @kevincornine
      @kevincornine 7 місяців тому

      Yes he is measuring load sharing across 2 lines which we see showing a 50% reduction in weight in both lines as they are sharing each of the total load. This doesn’t equate to a mechanical advantage it’s just a change of direction.

  • @jonroberts9112
    @jonroberts9112 Рік тому +1

    You are confusing force at the pulley vs. mechanical advantage. I agree you have 6.2 Kg. But that is the force at the pulley. You have to have a moving pulley to have a mechanical advantage. The setup you show is simply a redirect.

    • @L2SFBC
      @L2SFBC  Рік тому

      This video was created to specifically explain that you don't always need a moving pulley to create MA...

    • @L2SFBC
      @L2SFBC  Рік тому

      l2sfbc.com/you-can-get-mechanical-advantage-from-a-snatch-block-that-doesnt-move/

  • @philmenzies2477
    @philmenzies2477 3 роки тому +1

    Flat Earthers be like......🤨😵😮😰😱

  • @johnx9318
    @johnx9318 3 роки тому +1

    Your physics is fine, Your terminology is a bit squiffy is all.

  • @Oldiesyoungies
    @Oldiesyoungies 3 роки тому +1

    witchcraft

    • @L2SFBC
      @L2SFBC  3 роки тому

      Wizard you mean

    • @Oldiesyoungies
      @Oldiesyoungies 3 роки тому +1

      @@L2SFBC t'was invented by no man

  • @lanceleavitt7472
    @lanceleavitt7472 2 роки тому

    If you have the right mind set, these facts mean nothing. And at that point you can run
    for governor, or prime minister, or president of the United States. In fact, you're qualified to
    be a politician anywhere in the world.