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Topic Closedtongue weight
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CharlieM View Drop Down
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    Posted: 24 Feb 2017 at 11:43am
Originally posted by StephenH

Okay, I'm a bit confused. In your example above, the weight at the jack (P) was 300 lbs. The result of your formula (W) was 285 lbs. Did you mean the weight at the ball will be slightly less than at the jack?

Correct. Further from the axle. The pivot point (fulcrum) is the axle to which everything is referenced.
Charlie
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mcarter View Drop Down
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Posts: 3419 		Direct Link To This Post Posted: 24 Feb 2017 at 11:53am
I would very interested in knowing what some of you are getting for tongue weight, I plan on checking mine later today. Right now I have a single propane tank, single battery and my gen set mounted on an a-frame rack. I have NOT checked it with the gen set mounted. I have a 400 lb scale I bought at WalMart.
Mike Carter
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TheBum View Drop Down
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Posts: 1407 		Direct Link To This Post Posted: 24 Feb 2017 at 2:30pm
Originally posted by CharlieM


Originally posted by StephenH

Okay, I'm a bit confused. In your example above, the weight at the jack (P) was 300 lbs. The result of your formula (W) was 285 lbs. Did you mean the weight at the ball will be slightly less than at the jack?

Correct. Further from the axle. The pivot point (fulcrum) is the axle to which everything is referenced.


It goes back to the torque argument. To rephrase what Charlie said, the further the distance from the pivot point, the lower the force needed to maintain equilibrium.


And, yes, I do have an engineering degree, but electrical and not mechanical/civil. I learned most of my mechanical physics from building and flying RC helicopters. Torque is a very big deal in that application.
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mjlrpod View Drop Down
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Posts: 1221 		Direct Link To This Post Posted: 24 Feb 2017 at 3:05pm
Originally posted by StephenH

Okay, I'm a bit confused. In your example above, the weight at the jack (P) was 300 lbs. The result of your formula (W) was 285 lbs. Did you mean the weight at the ball will be slightly less than at the jack?

That was my thought exactly. your first statement, the weight is slightly less at the ball, than at the jack i believe is accurate. As you get further away from the fulcrum (the axle) the tongue would get lighter and lighter.  Its the " give me a lever long enough and i'll move the world" scenario.
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mcarter View Drop Down
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Posts: 3419 		Direct Link To This Post Posted: 24 Feb 2017 at 3:18pm
Charlie,

Correct me if I am wrong, when you do tongue weight you want to be as close to possible to your tow height. All a teeter/totter theory. BTW - Enjoyed the engineer dialogue, haven't done that since I retired, except with myself. Maybe we should start a little engineering group, only kidding. Still would be interested in what you all are getting for a tongue weight.
Mike Carter
2015 178
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StephenH View Drop Down
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Location: Wake Forest, NC
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Posts: 6418 		Direct Link To This Post Posted: 24 Feb 2017 at 7:55pm
Unfortunately, I will be unable to get a good reading until after our 'Pod is repaired. The heaviest item, our dual-6V batteries, has been removed in preparation for it to go to the factory. A number of other mods have also been removed, and it is emptied out of almost everything movable. The last time I tried was when I had everything, including the Stromberg-Carlson Trailer Tray and generator in addition to a full tank of water. The tongue weight was around 450 lbs.

Now that we have the truck, there will be no need to carry the generator on the trailer tongue so I will likely consider not reinstalling the rack. I might find it useful for other things though.
StephenH
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CharlieM View Drop Down
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Posts: 1797 		Direct Link To This Post Posted: 24 Feb 2017 at 8:15pm
Originally posted by mcarter

Charlie,

Correct me if I am wrong, when you do tongue weight you want to be as close to possible to your tow height.

Correct.
Charlie
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Grandpa Hiker View Drop Down
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Posts: 143 		Direct Link To This Post Posted: 25 Feb 2017 at 3:54am
Here is a link to a site with photos on how to make the tongue weight scale. I drilled holes through the pipes & screwed them into the beam so I do not have to be concerned about  the pipes rolling out of place.
Rob & Becky
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jato View Drop Down
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Posts: 3329 		Direct Link To This Post Posted: 25 Feb 2017 at 6:51am
Thank you Grandpa Hiker.  Once all the snow melts and I can get to my 177 I will see what the tongue weight is.  Great pictures! Indeed, worth a thousand words.
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ToolmanJohn View Drop Down
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Posts: 451 		Direct Link To This Post Posted: 25 Feb 2017 at 6:58am
Originally posted by osage

is the listed tongue weight on the pods dry or wet?

Get a cheap 350-400 pound bathroom scale (yes, they're out there). Block/chock those wheels!! 

Connect to your tow vehicle, place the trailer coupler on the ball and lift the jack off the ground.

Put the scale under the jack, raise the tongue with the jack centered on the scale.

 You will know right away if you have exceeded 350 pounds. Or if you are under 350 pounds. No need to know EXACTLY in this case.
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