Think of a device that can transfer a payload to a tether

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Discussion Overview

The discussion revolves around designing a mechanical device capable of transferring a payload to a tether, specifically lifting it to a height of approximately 150 cm. Participants explore various mechanisms and ideas for launching and securing the payload using a rope as the tether.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes using a spring mechanism to launch the payload, likening it to a catapult, but struggles with how to secure the device to the tether after launch.
  • Another participant expresses confusion about the initial explanation and seeks clarification on the mechanics of the device and the payload's fate.
  • There is a suggestion to use a rod that locks into place instead of a rope, which is dismissed by the original poster who insists on using a rope.
  • A participant questions whether the rope is fixed or can be wound around a windlass, indicating potential variations in design.
  • One participant hints at the function of a ratchet as a possible mechanism but acknowledges the constraints of the project rules preventing direct guidance.
  • The original poster mentions considering pressurized air as a potential method for the device's operation.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of various mechanisms, particularly regarding the use of a rod versus a rope, and the constraints of the project rules. The discussion remains unresolved with multiple competing ideas and no consensus on the best approach.

Contextual Notes

Participants have not fully clarified the limitations of the design, such as the specifics of the tether's functionality or the operational requirements of the device. The discussion reflects uncertainty regarding the mechanical principles involved.

tomallan
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hello there... thanks for viewing my post.

i need to think of a mechanical device that can transfer a payload to a through a tether and this device should lift up the payload and to a fixed place about 150 cm above the ground...

well i am thinking about a spring attached to the device and when the payload drops onto the device and then it will be like a catapult and launch into the fixed place.. but the problem is i can't think of a way to make the device fix into the tether after its launched.


any ideas would be great.
 
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I'm having a bit of trouble following you. Your 2nd sentence is a bit confusing.
 
ok.. sorry for the confusing sentence... this is my idea.. after the spring launch, device will fling up with the rope as a guide (rope is in middle of device). i can't think of any way to make device hold up in the air long enough when carrying the payload
 

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You're wanting to launch a device with a payload into the air along with a guide rope? Is that correct?
What exactly will happen to the payload?
 
yes you are right. the device will be launched into the air. the payload should be fixed with the device... thank you for any help.
 
And you want to know how to attach the device/payload to the guide rope? Or how to keep it in the air for a while?
 
both of them. I want to know a mechanism possible than can make use of the rope to lift the device upwards and after reaching the top, be there for a while.
 
any update guys?
 
How about some sort of rod that locks into place instead of a rope?
 
  • #10
its not possible. the required tether is a rope.. any ideas please.. I am very desperate
 
  • #11
tomallan said:
its not possible. the required tether is a rope.. any ideas please.. I am very desperate

I'm sorry I don't know the details of your project well enough to really say more.
 
  • #12
Is the rope fixed? Or can you wind it around a windlass?
 
  • #13
tomallan said:
its not possible. the required tether is a rope.. any ideas please.. I am very desperate

I have a very simple idea that should work well. It's your school project, though, so the PF rules say that I cannot just tell you how to do it.

Here's a hint -- how does a ratchet work? What is its function, and how does it accomplish this function? What variations on a ratched might work well in this application of yours with the rope...?
 
  • #14
the ratchet method is not allowed. the mechanical device should be autonomus. Its like when i drop a payload onto it, it should automatically do the mechanical function. I was thinking about using pressurised air..
 

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