How To Calculate Mechanical Advantage with Petzl Gear

Written By: Lance Piatt

A mechanical advantage haul system reduces the effort required to raise a load. The mechanical advantage obtained is based on the pulley effect.

 

1. The Pulley Effect

If we consider a load suspended on a rope, the rope passing through a pulley above the user, with the user’s hand holding the rope on the other side of the pulley; any force applied to one end of the rope is transmitted to the other end of the rope, or, in this case, to the end of the rope on the other side of the pulley.

If the load weighs 100 kg, it is clear that the user must hold 100 kg on their side to hold the load. The two rope strands each exert a pull of 100 kg, so the pulley supports 200 kg.

Note: this theory is valid for an ideal pulley of 100% efficiency, which does not exist in the real world.In reality, pulley efficiencies range from about 50 % to 98 %.To simplify calculations, this discussion is limited to ideal pulleys.

 

2. Calculating mechanical advantage in practice

The efficiency (E) of a haul system indicates the force multiplier factor that you can exert on the rope.For example, if you are able to pull 20 kg maximum on a rope with your bare hands, a 3:1 haul system will enable you to raise a 60 kg mass.This reduction is obtained by increasing the amount of rope to be pulled: to raise a mass 1 meter with a 3:1 system, 3 m of rope must be pulled.

  • The efficiency (E) of a haul system may be calculated by adding the effects of each pulley.
  • Start by drawing a simple diagram of the system, then show the pulling force F that the hand applies to the rope.
  • Transmit the force F along the rope by adding the effects of each pulley.
  • When multiple rope strands are attached to the load (double pulley, rope clamp…), add the forces exerted by each strand.
1:1 HAUL SYSTEM

 

2:1 HAUL SYSTEM
3:1 HAUL SYSTEM

Note: the advantage of a 3:1 system is its ease of setup and that it can easily be converted to a complex system (7:1) with one additional pulley and some cord.

4:1 HAUL SYSTEM
5:1 HAUL SYSTEM
Buy This Gear

Peace on your Days

Lance

Categories
Facebook
Twitter
LinkedIn
Email

About The Author:

Related Posts

38 thoughts on “How To Calculate Mechanical Advantage with Petzl Gear”

  1. I would like to thnkx for the efforts you have put in writing this blog. I am hoping the same high-grade blog post from you in the upcoming as well. In fact your creative writing abilities has inspired me to get my own blog now. Really the blogging is spreading its wings quickly. Your write up is a good example of it.

  2. 738136 313616Your writing is fine and gives food for thought. I hope that Ill have a lot more time to read your articles . Regards. I wish you which you regularly publish new texts and invite you to greet me 745418

  3. 341071 612898This is such a fantastic resource that youre offering and you supply out at no cost. I appreciate seeing websites that realize the worth of offering a perfect beneficial resource completely totally free. I genuinely loved reading your submit. 956415

  4. It makes me wish to unleash her, route her to the bed in the position that is my preferred, as well as it makes me
    desire to take her, to shout with her. It makes me want
    to pump her till my cock vibrates as well as discharges my warm encountered her face.
    Numerous laugh at the idea when a person claims I am going to Leash train my
    Slave or Passive. The leash can have an excellent influence on the Servant/ Submissive.
    Read More Bdsm Leash GifThe Master would certainly educate commands
    not with words however with motions of the leash. Drawing
    down on the chain shows you wish for yours to kneel, pulling up suggests
    you want for them to stand.
    This is to insure he has complete control. Instructing
    the slave the different movements without talking is not as very easy as it
    seems. You are instructing the Slave/Submissive to adhere to
    on your commands without speaking. It would be practically the like Horse training.
    Any type of training for that matter you
    as the Dominant needs to stay consistent in your training.
    To take it one action farther You can make use of cuffs, behind their
    back. The commands are a lot like the commands you would provide if you utilize servant placements in your partnership – bdsm red owned collar and leash.
    The various other day Arianna as well as I was talking as
    well as I was going to alter the way she greeted me. She did greet me on knees curved ahead with arms stretched out face down. I instructed her I now desired slave placement
    # 2 The exact same however dealing with far from me hands on ass dispersing
    apart. leash ddlg bdsm.

  5. I apologise, but, in my opinion, you are mistaken. Let’s discuss it. Write to me in PM, we will communicate.

    I’m shocked, this is rhyme of the most interesting videos due to the details that real boy that I watched.
    I recommend to go together with it, I indubitably could not horse-race myself away from watching it. Would wooer to do the scrupulous anyhow again.
    https://xcavy.com/search/chinese-cuntbusting/
    Who whim help?

  6. I think, that you are mistaken. I can defend the position. Write to me in PM, we will talk.

    I’m shocked, this is sole of the most compelling videos in the note of macho that I watched.
    I suggest to caretaker on the alert for it, I definitely could not tear myself away from watching it. Would sweet-scented to do the still and all again.
    perra bdsm
    Who whim help?

  7. cialis If possible, avoid coadministration with CYP3A4 inhibitors; if coadministration is essential, long-term therapy is indicated, or strong CYP3A4 inhibitors are required, modify or hold dose

  8. Ищете положительные и негативные отзывы о Relouis Гель для ускорения роста ресниц Длинные ресницы? 91,20 грн Условия работы Частые вопросы Поддерживаемые форматы: JPG, JPEG, PNG, BMP, GIF. Aqua, Propylene Glycol, Triethanolamine, Acrylates C10-30 Alkyl Acrylate Crosspolymer, Imidazolidinyl Urea, Sodium Dehydroacetate, Sorbic Acid, Sodium Methylparaben, Actinidia Chinensis Fruit Extract , Panthenol, Tetrasodium Edta, Glycerin, Pentylene Glycol, Phenoxyethanol, Phospholipids, Glycosphingolipids, Sodium Hydroxide, Cholesterol. : CI 42090. ТОП-10 идей для маникюра: выбери свой вариант ТОП-10 идей для маникюра: выбери свой вариант и получите персонализированную программу ухода от Vichy +7 (977) 363-12-74 Прекрасный, просто отличнейший тональный практически не окисляется, очень лёгкий, по качеству очень схож с Шанель, но … в некоторых моментах даже лучше однозначно рекомендую! Огромные проблемы не скроет. На лето идеально…↑ На карточку ПриватБанка(карта Visa, MasterCard) Наложенный платеж, Курьеру при получении. Вопросы? Звоните, пишите +38067 460 2891 https://ohaakademy.com/community/profile/candacewroe3527/ Как пользоваться массажерами Массажер для лица с розовым кварцем в первую очередь предназначен для использования с некоторыми сыворотками. Лучше всего работают сыворотки с витамином С и гиалуроновой кислотой. В набор также входит плоский розовый кварцевый камень, которым можно массировать лицо для лучшего впитывания масла, сыворотки или крема. Подробнее в конце текста. От того, как делать массаж массажером с шариками ручным девайсом, а также от правильности выбранного направления – зависит его результативность. В разных местах кожа не одинакова. При обработке Т-зоны лучше использовать специальные насадки, из-за ее более высокой жирности, в отличие от остальных участков кожи. Независимо от того, какую цель вы планируете достичь и какую используете технику, придерживайтесь основных правил: Если же вы покупаете кварцевый массажер для лица оптом – помните, что даже при самых выгодных условиях он будет стоить дороже, чем нефритовый аналог. Если их стоимость одинакова, рекомендуется найти другой интернет-магазин или сайт, предоставляющий более качественные аксессуары для массажа на реальных условиях.

  9. cheapest cialis 20mg , multiple sclerosis , trauma, or infections that are associated with the development of symptoms of premature ejaculation PE and considered a potential cause of PE, Having genital abnormalities, except penile curvature unless not prevent sexual intercourse, Developed erectile dysfunction or premature ejaculation due to drug use or quit taking drugs, Any conditions that prevent sexual intercourse with partners History of epilepsy, Severe renal insufficiency, Liver disease, History of in last 6 months stroke, myocard infarction, cardiac insufficiency New York Cardiovascular Associates NYCA phase II-IV , atrioventricular block or message disorder such as sick sinus syndrome, severe ischemic cardiac disease, syncope, unstable angina, life-threatening arrhythmia or hypotension, Non-Arteritic Anterior ischemic optic neuropathy, Patients who are not eligible to have sexual intercourse due to existing health problems, Autonomic neuropathy, retinitis pigmentosa, blood diseases, active peptic ulcer, abnormalities in ECG, severe systemic disease that cannot be controlled, Systolic Diastolic blood pressure at rest History of allergy to Selective Serotonin Reuptake Inhibitor SSRI and phosphodiesterase inhibitor drugs, Continuing to use or quitted in last 3 months of Monoamine oxidase inhibitor MAOI , Thioridazine, Serotonin Reuptake Inhibitor SSRI , Selective-norepinephrine Reuptake Inhibitor SNRI , Serotonergic drug herbal product, tricyclic antidepressant and atypical antipsychotic drugs, Use of nitrates, alfa blockers, vasodilators, ketoconazole, itraconazole, ritonavir, saquinavir, telithromycin, nefazodone, nelfinavir, atazanavir, cimetidine, erythromycin, clarithromycin, fluconazole, amprenavir, fosamprenavir, aprepitant, verapamil, diltiazem, any kind of vasodilator, antiplatelet, anticoagulant, dapoxetine, phosphodiesterase 5 inhibitor, alcohol and stimulant drug, Patients on a different therapy behavioral therapy or other drugs that are applied locally for PE treatment During the study, the possibility of taking medication which may affect the study drug s pharmacokinetic pharmacodynamic properties Patients who are defining symptoms of prostatitis clinically Thyroid hormone disorders

  10. You may not be getting pregnant because your body isn t going through the usual hormone changes that lead to the release of an egg from the ovary and the thickening of the lining of the uterus. can you take clomid if you already ovulate In the two study groups, live birth rate following fresh transfer cycles and CLBR were compared in different age groups.

  11. Other bias High risk However, because of the premature termination of the study, the CoQ10 group had only one third and the control group half of the target number. clomid pills Direct Visualization of Ebola Virus Fusion Triggering in the Endocytic Pathway.

  12. I think, that you commit an error. I can defend the position.

    I’m shocked, this is at song of the most engrossing videos in the service of the duration of macho that I watched.
    I indicate to watch it, I unquestionably could not horse-race myself away from watching it. Would sweet-smelling to do the at any rate again.
    porn bdsm slave
    Who figure out help?

  13. I don’t even know the way I stopped up here, however I thought this put up used to be good. I do not recognise who you are however definitely you are going to a well-known blogger in the event you are not already 😉 Cheers!

Comments are closed.