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Old 12-06-2012, 01:36 PM   #1 (permalink)
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How to I precicely measure two points?

I need to get the most accurate measurement from these two points.

The parts I'm trying to measure are 8 feet apart.

I would like to be able to replicate this so I can periodically check the two points.


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Maybe a bar with a gauge or caliper on the end of it? Looking for the best way to align my runners on my iceboat.

The straighter I can get them, the less drag I'll have and the faster I can go.
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Old 12-06-2012, 01:46 PM   #2 (permalink)
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A frickin laser. Cheap at home depot.
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Old 12-06-2012, 01:51 PM   #3 (permalink)
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Quote:
Originally Posted by Painthappy View Post
Maybe a bar with a gauge or caliper on the end of it?
That is the easiest answer.

Just use a bar as standard (about 7 feet 10 inches long) and then use the calipers between the bar and runners.
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Old 12-06-2012, 01:53 PM   #4 (permalink)
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Buy a 9 foot board, and cut it the exact length you want. Then you can just lay it between and position it snug every time you want to check it.

Put duct tape in the middle of it to label it, (every good project needs a little duct tape).
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Old 12-06-2012, 02:00 PM   #5 (permalink)
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I was going to say ask a woman, they seem to know everything.

That out of the way, yeah, a laser.
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Old 12-06-2012, 02:04 PM   #6 (permalink)
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All good answers, out of curiosity wouldn't checking your parrellels be important too in reducing the drag?

Lasers or create a welded jig for the runners out of angle iron.
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Old 12-06-2012, 04:31 PM   #7 (permalink)
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Use these calipers.



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Old 12-06-2012, 04:49 PM   #8 (permalink)
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Since it is 8 feet apart, you could just use the ol' 6-8-10 triangle. mark two spots that are at the same place on each runner, and another 6 feet up from it. Measure from the original spot to 6' up spot on the other side, and you know they are parallel.

As long as the runners can't move up and down relative to each other on your drawing, this should work pretty well, and all you need is a tape measure
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Old 12-06-2012, 05:15 PM   #9 (permalink)
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Will you be lining them up at freezing temperatures? How precise? Most materials contract at low temp so laser may be the best bet
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Old 12-06-2012, 05:50 PM   #10 (permalink)
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As precise as I can get it. The chocks that hold the blades in are already installed and those are usually done so so they are straight, but I can double check those just in case.

They must be ok, because last season I was moving when others were not, and usually that has a LOT to do with runner alignment.

I'm just looking for a way to perfect it.

I have metal at my disposal, so making some sort of custom jig might be best. Though the pole and caliper would probably be the simplest way.
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