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Pulling Power


wildewood
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Any one here good at maths and equations?

 

Pen and paper at the ready.

 

Sweet chestnut, 10 metres length, with the total weight of the stripped stem weighing 2.5 T on a slope of 40 degrees.

 

The hung up tree leans down the slope at 50 degrees.

 

The wire to pull the top of tree back up the slope, i.e. towards the top of the hill, will have an angle of 30 degrees.

 

All angles are from a horizontal plane.

 

Anchor point 25 metres from wire attachment point on hung up tree.

 

There will be no resistance from root plate, but some from hinge.

 

So, how much force (pull) will be needed to lift tree to an upright position?

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45000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 and 1 N.

 

thankyou, where do i pick my prize up from?

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At a wild guess I would say something leaning out at 45 degrees would have 50% of it's weight on the pivot point (root) and 50% on whatever is holding it up.

 

Therefore if you use a 2 ton winch you are allowing for any resistance or error.

 

All I would do is put in a 5 to one fiddle block one way system to hold the trunk in place should the winch fail :001_smile:

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45000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 and 1 N.

 

thankyou, where do i pick my prize up from?

 

No prize; your'e one o out.

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At a wild guess I would say something leaning out at 45 degrees would have 50% of it's weight on the pivot point (root) and 50% on whatever is holding it up.

 

Therefore if you use a 2 ton winch you are allowing for any resistance or error.

 

All I would do is put in a 5 to one fiddle block one way system to hold the trunk in place should the winch fail :001_smile:

 

Thanks Dean, that wild guess sounds good to me. Using a 3.5 T winch system, plenty of margin...

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