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Topic Closedtongue weight
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mcarter View Drop Down
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Joined: 07 Apr 2016
Location: Greenbrier, TN
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Posts: 3419 		Direct Link To This Post Topic: tongue weight
    Posted: 22 Feb 2017 at 5:43pm
I tried it, it works, somebody's darn theorem. Love to post a photo but we know how that goes, I put my generator on the A frame mount a couple of days ago so I need to do again, BTW I used 1 1/2 pipe to be compatible with 2X4.
Mike Carter
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jato View Drop Down
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Posts: 3223 		Direct Link To This Post Posted: 22 Feb 2017 at 8:58pm
mcarter, you must be an engineer!
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Joined: 27 May 2014
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Posts: 473 		Direct Link To This Post Posted: 23 Feb 2017 at 7:35am
This is very nice.

I assume the brick is so that it's reasonably level with the bathroom scale, but why not use a foot-long 2X2 or 2X4  rather than a pipe?
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mcarter View Drop Down
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Joined: 07 Apr 2016
Location: Greenbrier, TN
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Posts: 3419 		Direct Link To This Post Posted: 23 Feb 2017 at 10:19am
Good question, my only guess is the pipe distributes weight more exactly that the wider 2X4 would and has more strength than a 2X2.
Mike Carter
2015 178
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CharlieM View Drop Down
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Joined: 23 Nov 2012
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Posts: 1797 		Direct Link To This Post Posted: 23 Feb 2017 at 12:11pm
The idea of the pipe is to provide a sharp edge  so you know exactly where contact is made. You can get the same effect by slicing a 6" length of 2x2 lengthwise at a 45 degree angle yielding two 6" lengths with triangular cross sections. Place one each on the scale and brick with the wide sides down so you have two edges pointing up. That provides very accurate points to measure your 1 and 2 feet. A bit more trouble but it eliminates the rolling pipe problem.
Charlie
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mcarter View Drop Down
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Joined: 07 Apr 2016
Location: Greenbrier, TN
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Posts: 3419 		Direct Link To This Post Posted: 23 Feb 2017 at 2:11pm
Thanks Charlie, makes sense.
Mike Carter
2015 178
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Joined: 26 Feb 2016
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Posts: 1407 		Direct Link To This Post Posted: 23 Feb 2017 at 4:22pm
Would steel angle iron work as well, or is the Pod too heavy?
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mcarter View Drop Down
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Joined: 07 Apr 2016
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Posts: 3419 		Direct Link To This Post Posted: 23 Feb 2017 at 4:50pm
Bum,

I think yes, I used pipe because I had pipe, I think Charlie has a good point but I didn't want to "cut wood". I used what I had. The process is the same and allows you to use a bathroom scale. You can't put some wimpy angle iron under it, but that's common sense and we have that. I like pipe because it has many uses, wood seems to have one purpose once it's cut. To me.
Mike Carter
2015 178
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TheBum View Drop Down
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Joined: 26 Feb 2016
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Posts: 1407 		Direct Link To This Post Posted: 23 Feb 2017 at 5:56pm
I think the theory is based on torque. With the brick defined as the pivot point, the torque of the system would be the weight of the tongue (W lbs) times the distance from the tongue weight to the brick, or W ft-lbs. The torque along all points of the 2x4 must be the same, so at triple the distance, the weight to get the same torque would be 1/3 W.
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mcarter View Drop Down
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Joined: 07 Apr 2016
Location: Greenbrier, TN
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Posts: 3419 		Direct Link To This Post Posted: 23 Feb 2017 at 6:33pm
I agree Bum, doesn't appear I am the only engineer on this forum:)
Mike Carter
2015 178
" I had the right to remain silent, I just didn't have the ability."
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