How to Tie Knot to Dumbbell so Dumbbell Remains Vertical.
Bob Ptaker
The weight is attached to a pulley by a rope. I want to replace the
water bag with a 10 pound dumbbell weight.
QUESTION: How can I attach the rope to the dumbbell so the dumbbell
remains vertical and not at an 20 or 30 degree angle. If not vertical
it would hit the door behind it as it swings into position.
What knot can I use to do this?
Bob
roo
That's a tricky one, especially not knowing what your dumbell looks
like. Are then ends flat or at least free from serious protrusions?
Some dumbells have a hollow handle that could be used to your
advantage.
Anyway, this may be cheating, but you could place the dumbell in a
sturdy sack, and attach the neck of the sack to a rope with something
like this:
http://notableknotindex.webs.com/sailorhitches.html
If the sack is too loose, I could imagine that a binding about the
barbell might help prevent shifting.
Cheers,
roo
Bob Ptaker
To see a drawing of what the dumbbell looks like (not to scale) please
go here: http://www.atrprinting.com/RGL/ It is a solid piece. If
you have an idea without a sack, I would appreciate it. I was looking
for some kind of rope to go around point A and have rope(s) attached
going upward to keep the dumbbell straight. Oh well, just my vision.
Hope you can help.
Heikki
>
> To see a drawing of what the dumbbell looks like (not to scale) please
> go here: http://www.atrprinting.com/RGL/ It is a solid piece. If
> you have an idea without a sack, I would appreciate it. I was looking
> for some kind of rope to go around point A and have rope(s) attached
> going upward to keep the dumbbell straight. Oh well, just my vision.
> Hope you can help.
How about tying a clove hitch at point A, and bringing both ends up at
opposite sides of the bell? If that is not stable enough, try with two
strings, clove hitched, and all four ends coming up at different points.
Adjust them until it hangs straight. If they won't stay in place, you may
have to force them either with a tight string around the wide part, or with
a string going from one hanging string to the next, all the way around.
-H
Bob Ptaker
Someone suggested a bottle sling. Look at a bottle sling at wikipedia
http://tinyurl.com/yznypd3 for a picture. My problem is that the
wikipedia instructions show just two ends, not four like in the photo.
Would that work? If so, how does it compare with your details?
roo
> On Nov 3, 10:05 am, Heikki <h...@lsd.dk> wrote:
>
>
>
>
>
> > Bob Ptaker wrote:
>
> > > To see a drawing of what the dumbbell looks like (not to scale) please
> > > go here: http://www.atrprinting.com/RGL/ It is a solid piece. If
> > > you have an idea without a sack, I would appreciate it. I was looking
> > > for some kind of rope to go around point A and have rope(s) attached
> > > going upward to keep the dumbbell straight. Oh well, just my vision.
> > > Hope you can help.
>
> > How about tying a clove hitch at point A, and bringing both ends up at
> > opposite sides of the bell? If that is not stable enough, try with two
> > strings, clove hitched, and all four ends coming up at different points.
> > Adjust them until it hangs straight. If they won't stay in place, you may
> > have to force them either with a tight string around the wide part, or with
> > a string going from one hanging string to the next, all the way around.
>
> > -H
>
> wikipedia instructions show just two ends, not four like in the photo.
>
> - Show quoted text -
A jug sling might just work for you, although it is kind of a pain to
tie. If you go to Google Books and type the following terms:
knots sling Budworth
...you should find explicit instructions. The neck goes in the center
of the knot.
Or try this link:
Heikki
I am not familiar with the bottle sling, but it looks like it would work
just fine. If it holds in the narrow neck of a bottle, your dumbbell should
not pose any problem.
Theoretically, three strings should be sufficient to balance an odd shape,
but four is easier to manage, by doubling two lengths of line.
-H
Davej
>
>>> QUESTION: How can I attach the rope to the dumbbell so the dumbbell
>>> remains vertical and not at an 20 or 30 degree angle. If not vertical
>>> it would hit the door behind it as it swings into position.
>>> What knot can I use to do this?
>
> go here: http://www.atrprinting.com/RGL/ It is a solid piece.
Why not simply take a short length of rope and tie each end to the
weight using any hitch knot. Then the weight would hang by this short
loop. Tie a longer rope to the center of this short loop.
roo
>
> Why not simply take a short length of rope and tie each end to the
> weight using any hitch knot. Then the weight would hang by this short
> loop. Tie a longer rope to the center of this short loop.
The difficulty is that the tension in the rope interacting with the
round end of the dumbell tends to make the rope slip and push the end
of the barbell off center.
The effect will vary depending on the dimensions of the dumbell.
Davej
> On Nov 4, 11:05 am, Davej <galt...@hotmail.com> wrote:
>
> > Why not simply take a short length of rope and tie each end
> > to the weight using any hitch knot. Then the weight would hang
> > by this short loop. Tie a longer rope to the center of this short loop.
>
> The difficulty is that the tension in the rope interacting with the
> round end of the dumbell tends to make the rope slip and push
> the end of the barbell off center.
Well, you could weave something but there are probably more practical
approaches; such as drilling the dumbell and adding an eyelet or
fashioning an end handle out of a wire coat hanger. Or discard the
dumbell and find a weight that is more appropriate for hanging.