How to weigh a boat?

[Techno]

I can't take it off the trailer so any ideas? I don't care if it involves nuclear physics to calculate it from a lift point.
I do have a remote read scale, something like a bathroom scale but the readout is seperate. 450 lb. capacity

I vaguely remember weighing the whole thing and it wieghed about 2,000lbs.

[FCnLa]

This might be a problem (not being able to take it off of the trailer). I believe it is usually done with cables hooked to the stern of the boat and a strap around the bow, and some type of hoist.

If you know what you trailer weighs, no problem. Take a weight of each wheel and tongue. You must block up each point with the same height as the scale is to be accurate. Done this when checking the weight and balance of planes.

As far as some formula, figure the weight of the materal of your trailer. There must be some formula or values of material (weight per foot of channel, tubing, etc), and you could measure it and go from there. It would be time consuming though. You would also have to figure in any hardware, wheels, spindles, winch, etc, etc.

Good luck!:)

[Rickracer]

...then drop the hull in a nearby body of water and go weigh the trailer alone. Simplest way to go.

[woodco]

I would do the same...It's the easiest method.

[Techno]

First I would have to leave the boat in the water.
2nd I would have to drive over the salt infested roads.
3rd The trailer registration has expired -dec 31
4th I've already tented it and don't want to undo it and restash it.

I should have done this in the summer but never got around to it.

I hadn't thought of adding up the trailer stufff and figuring, this should get me close.
How does wieghing the wheels and tongue tell the boat wieght?

[LaserModVee]

Contact the manufacturer of your trailer, or a dealer that sells your brand of trailer. They can tell you what the trailer weighs.

That would solve the problem of dropping the boat in the water. I guess you'll still have to drag the whole rig to the scales though.

Do you know any round track racers? (Modifieds, sprints, etc.)
Those guys always have a set of quality digital scales. Borrow those, weight the whole thing in the garage, and subtract the trailer weight. That's the only way I can figure to accurately weigh it without towing it to a set of scales.

[Techno]

I did wiegh it at work on a truck scale and I think I wrote the number down 2050lbs?
The trailer is home built but just a bunch of C-channel. & a little diamond plate. I should be able to figure the mass of the steel. I'm going on 10 hr nights starting tonight so there will be some boring slow times during the next 10 weeks. I can't surf on the company puter.

Just needed a ball park figure to figure some stuff.

[woodco]

Ya better register that trailer or the town's gonna get ya......:D


P.S. How'd ya make out the last time ya went to court ?

[FCnLa]

Maybe I was thinking too much. I was thinking of weighing each point of the trailer (with the boat on it) and adding them up. Since each side would probably weigh different. You have to have the rest of the trailer level. This is the reason for the blocks, to keep it from leaning, which would change the weight on the lower and higher points. If you could find three scales, you could just weigh it just once and add up the weight. The shop where I use to work only had one scale, hence the wood blocks to keep the plane level.

He did say leave it on the trailer, reason for my crazy weighing plan:o

[MTCM]

Techno,

Single Axle (Steel) Trailer............about 700lbs. This is a rough estimate. The trailer I have the 'Stream on is 700lbs. It is a galvanized steel drop-frame trailer, single axle. F78 x 14 tires on galvanized wagon wheel spoke rims. It is about 23 ft long and 7 feet at the widest point.