Max capacity

[TMALEGA]

Ok so i have a question i have been spending most of today trying to find a answer to. How do i find the max capacity of my older boat if the plate is faded. Are the numbers and all that good info on that plate actually stamped or is it a etching? I was thinking i may be able to get a pencil and a piece of paper and do a rubbing but not sure if that is the best way or if it would even work at alll.

 

[Brewman61]

Re: Max capacity

What do you have to loose in trying? Worse case it won't work.

 

[not enuf toys]

Re: Max capacity

to calculate person capacity:

boat lenght in feet x width in feet /15

to calculate weight capacity would require calculating displacement first http://newboatbuilders.com/pages/load.html this is a good way to get the exact number

or general rull of thumb of 150 per person (even though in america no one weights 150)


if you need a replacement plate, check with the manufacture. they wont always help out but sometimes do. another option is to check with your state recreational division.

 

[TMALEGA]

Re: Max capacity

True i dont have anything to lose by trying i just didnt know if it was something someone had already tried and failed on and had figured a better way.

As far as the checking with my local department i hadnt thought of that or the manufacture. Thanks for the ideas i will try them tomorrow as today was rough at work and need the sleep.

 

[Brewman61]

Re: Max capacity

In my case, multiplying my capacity of 8 persons by 150 would put me over the maximum weight rating of 1160. That works out to about 145, and that number would have to be lowered to allow for gear, coolers, and such. Probably varies by boat.

 

[rallyart]

Re: Max capacity

Add weight to the boat until it is sunk as far as it can be sunk, evenly, in dead calm water without any water entering it or overflowing.
Divide that by seven and you have a close approximation to the rated capacity. Of course, that is not that practical so try this method:
Find a boat of similar design, beam and length. Read their plate. That's pretty close to yours.

Edit
If I use length in inches times width in inches divided by 15 my capacity would be 1664#. My capacity is a very high 2800#. Most boats are not as high as mine for their size but most calculations not by the manufacturer are just guesses. There are formulas that are quite complex to calculate the capacity. You can find some on boat design sites.

Edit again.
length in feet by beam in feet divided by 15 is 11.5 people. My capacity for that is 12.
I am going to have to read more carefully at night.
The person capacity has to do, however, with the list caused by all person weight on one side so the hull design affects this number more significantly than the length. Again the formulas for person capacity can be found on some design sites. They have nothing to do with the number of seats in a boat.

I'm going to bed now so I quit reading posts wrong.:facepalm:

 

[soggy_feet]

Re: Max capacity

10x40/15=26.66666666666666666666666666....

I feel bad for whoever's number 27, they'll have to leave their arms and legs on the dock... and I dont think I have any really sharp knives in the galley. :/

 

[not enuf toys]

Re: Max capacity

They have nothing to do with the number of seats in a boat.

true, unfortunately most boats plate show more people than seats on the boat...this gets very dangerous when in motion if not everyone can sit down.

every boat i have ever owned showed a number higher than the places for a rear end. i would never attempt to do that...my sanity couldnt handle it!!

 

[TruckDrivingFool]

Re: Max capacity

every boat i have ever owned showed a number higher than the places for a rear end.

That's what laps are for.