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majid_sabet
Aug 7, 2007, 5:00 PM
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trenchdigger wrote: majid_sabet wrote: Tranch Draw me a 5:1 closed system I hope you know how to do it without google. Major Sorbet If we assume the pulleys are 100% efficient (or if we included a bunch of complicated friction and thermodynamic calculations), then this is a closed system. Do you know the definition of a "closed system" without Googling it? Did you possibly mean a simple 5:1 system?
5:1 close system is generally simpler than what I have up there so yes you can call it simple 5:1
No google search is allowed
Also do the math on those angle and tell me if OP is actually a 5:1 .
it should be near 4:1 + -
move it move it move it
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rasoy
Aug 7, 2007, 5:23 PM
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You know
All this number crunching is for nerds and geeks. In real world applications out in the field if you can't pull the load add more mechanical advantage. That's what we do. Improvision is the key.
Not that professor know it all stands there and starts crunching numbers and theories. Waste of time, as the patient and rescuer has to to be raised and time is of critical importance.
Just like in war, some guy is shooting at ya. Some West Point nerd will say this bullet is traveling at such and such velocity and has this particular bore carries such and such ammo and blah blah blah.
Meanwhile .........
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trenchdigger
Aug 7, 2007, 5:49 PM
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majid_sabet wrote: 5:1 close system is generally simpler than what I have up there so yes you can call it simple 5:1 No google search is allowed
Do you even know the definition of a simple pulley system?
majid_sabet wrote: Also do the math on those angle and tell me if OP is actually a 5:1 . it should be near 4:1 + - move it move it move it
(This post was edited by trenchdigger on Aug 7, 2007, 5:58 PM)
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trenchdigger
Aug 7, 2007, 5:57 PM
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rasoy wrote: You know All this number crunching is for nerds and geeks. In real world applications out in the field if you can't pull the load add more mechanical advantage. That's what we do. Improvision is the key. Not that professor know it all stands there and starts crunching numbers and theories. Waste of time, as the patient and rescuer has to to be raised and time is of critical importance. Just like in war, some guy is shooting at ya. Some West Point nerd will say this bullet is traveling at such and such velocity and has this particular bore carries such and such ammo and blah blah blah. Meanwhile .........
It is, however, good to know the most efficient systems to achieve MA. That's where the number crunching comes in handy. Try to add MA with the wrong type of system and you're just making things more complicated with little or no actual increase in MA.
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majid_sabet
Aug 7, 2007, 6:06 PM
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trenchdigger wrote: majid_sabet wrote: 5:1 close system is generally simpler than what I have up there so yes you can call it simple 5:1 No google search is allowed You still don't know what a closed system is. I'll even change the rules - you can google it. Do you even know the definition of a simple pulley system? majid_sabet wrote: Also do the math on those angle and tell me if OP is actually a 5:1 . it should be near 4:1 + - move it move it move it Obviously, not enough information is given to calculate anything.
You got an F for not answering my questions
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trenchdigger
Aug 7, 2007, 6:37 PM
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majid_sabet wrote: trenchdigger wrote: majid_sabet wrote: 5:1 close system is generally simpler than what I have up there so yes you can call it simple 5:1 No google search is allowed You still don't know what a closed system is. I'll even change the rules - you can google it. Do you even know the definition of a simple pulley system? majid_sabet wrote: Also do the math on those angle and tell me if OP is actually a 5:1 . it should be near 4:1 + - move it move it move it Obviously, not enough information is given to calculate anything. You got an F for not answering my questions
Here's a simple 5:1 system.
As I said before, your second question cannot be answered. Not enough information is provided.
Now your chance to show us how much you know (I'll even let you google the answers):
1) Define "closed system" as it pertains to hauling systems.
2) Define simple, complex, and compound as they pertain to hauling systems.
3) Which of the 5:1 systems in this thread is more efficient? The simple system shown here, or your illustrated complex 5:1 system?
BONUS) Show me a COMPLEX 7:1 MA hauling system.
(This post was edited by trenchdigger on Aug 7, 2007, 6:44 PM)
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simple_5to1.gif
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binrat
Aug 7, 2007, 6:39 PM
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This is what I know as a 5:1 closed system.
Binrat
edited because I screwed the diagram.
(This post was edited by binrat on Aug 7, 2007, 7:02 PM)
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stymingersfink
Aug 7, 2007, 10:30 PM
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rasoy wrote: You know All this number crunching is for nerds and geeks. In real world applications out in the field if you can't pull the load add more mechanical advantage. That's what we do. Improvision is the key. Not that professor know it all stands there and starts crunching numbers and theories. Waste of time, as the patient and rescuer has to to be raised and time is of critical importance. Just like in war, some guy is shooting at ya. Some West Point nerd will say this bullet is traveling at such and such velocity and has this particular bore carries such and such ammo and blah blah blah. Meanwhile .........
Valid point, and generally that's what happens in a situation when one has enough background knowledge to know that what they're doing isn't necessarily the best way to get things done and it's time to improvise something a little bit different.
However, I think that I need to practice setting such haul systems on the ground before it comes to do-or-die time.
I guess it's time to start playing with something a little more complex than a 1:1 or a 3:1 if I really want to get my shit dialed to the point where the decisions about setting up a haul come intuitively.
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majid_sabet
Aug 7, 2007, 10:53 PM
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what is the MA on this one ?
[[URL=http://www.imagehosting.com] 
(This post was edited by majid_sabet on Aug 7, 2007, 11:00 PM)
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trenchdigger
Aug 7, 2007, 11:07 PM
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majid_sabet wrote: what is the MA on this one ? [[URL=http://www.imagehosting.com] [IMG]http://www.imagehosting.com/out.php/i1001328_untitled.JPG[/IMG]
Avoiding my questions? It's not the complex 7:1 I requested. I'll give you two more chances, then you fail.
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majid_sabet
Aug 7, 2007, 11:09 PM
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trench
What is the MA on this simple photo ?
say it before some one else does it
[URL=http://www.imagehosting.com] 
(This post was edited by majid_sabet on Aug 7, 2007, 11:11 PM)
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trenchdigger
Aug 7, 2007, 11:16 PM
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If I do, will you answer my questions?
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EFingers
Aug 8, 2007, 2:57 AM
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4:1
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trenchdigger
Aug 8, 2007, 5:32 AM
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Try again...
I'll give you a clue: It's a trick question.
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majid_sabet
Aug 8, 2007, 5:32 AM
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Trench
What is this?
Simple
Complex
Compound
[URL=http://imageshack.us]
(This post was edited by majid_sabet on Aug 8, 2007, 5:33 AM)
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rocknice2
Aug 8, 2007, 5:47 AM
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Majid answer Trench's question.
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trenchdigger
Aug 8, 2007, 5:47 AM
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majid_sabet wrote: Trench What is this? Simple Complex Compound [URL=http://imageshack.us][IMG]http://img215.imageshack.us/img215/2307/untitledgs8.jpg[/IMG]
It's your turn to tell me... You've got a 33% chance if you just guess.
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EFingers
Aug 8, 2007, 5:50 AM
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trenchdigger wrote: Try again... I'll give you a clue: It's a trick question.
Trick question? What 2:1 or is it that since the diagram doesn't accurately show the top pulley in a fixed position, does the whole thing fall apart?
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majid_sabet
Aug 8, 2007, 6:02 AM
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trenchdigger wrote: Try again... I'll give you a clue: It's a trick question.
Trick question LOL
Here is the real trick
(This post was edited by majid_sabet on Aug 10, 2007, 5:09 AM)
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majid_sabet
Aug 8, 2007, 6:04 AM
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trenchdigger
Aug 8, 2007, 6:10 AM
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majid_sabet wrote: EFingers wrote: trenchdigger wrote: Try again... I'll give you a clue: It's a trick question. Trick question? What 2:1 or is it that since the diagram doesn't accurately show the top pulley in a fixed position, does the whole thing fall apart? I think you are in a wrong post. trench is playing poker with me showing his cards but he has no cash to win this
And you have the deuce - seven, off-suit.
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trenchdigger
Aug 8, 2007, 6:12 AM
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Just try answering one of the three, Major Sorbet.
trenchdigger wrote: 1) Define "closed system" as it pertains to hauling systems. 2) Define simple, complex, and compound as they pertain to hauling systems. 3) Which of the 5:1 systems in this thread is more efficient? The simple system shown here, or your illustrated complex 5:1 system? BONUS) Show me a COMPLEX 7:1 MA hauling system. |
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majid_sabet
Aug 8, 2007, 6:17 AM
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trenchdigger wrote: Just try answering one of the three, Major Sorbet. trenchdigger wrote: 1) Define "closed system" as it pertains to hauling systems. 2) Define simple, complex, and compound as they pertain to hauling systems. 3) Which of the 5:1 systems in this thread is more efficient? The simple system shown here, or your illustrated complex 5:1 system? BONUS) Show me a COMPLEX 7:1 MA hauling system.
I am not a rigger, You need to ask Rasoy all these question.
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trenchdigger
Aug 8, 2007, 6:21 AM
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majid_sabet wrote: trenchdigger wrote: Just try answering one of the three, Major Sorbet. trenchdigger wrote: 1) Define "closed system" as it pertains to hauling systems. 2) Define simple, complex, and compound as they pertain to hauling systems. 3) Which of the 5:1 systems in this thread is more efficient? The simple system shown here, or your illustrated complex 5:1 system? BONUS) Show me a COMPLEX 7:1 MA hauling system. I am not a rigger, You need to ask Rasoy all these question.
Ah, c'mon... don't fold now. Most of these are simple questions.
(This post was edited by trenchdigger on Aug 8, 2007, 6:22 AM)
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