How much can a pontoon carry

The other route is to apprentice with a shipwright. It is longer, and you usually learn only "rules of thumb" and how to build local types. However, it is a good way to learn.

 

thanks gonzo

 

thanks par but i am studying mechanical engineering and am in my final year of study. but i belive that in life you cant know it all. that is why i asked this question

 

thanks ike your site is helpfull

 

Thank You Hoytedow

 

If you are in your final year of "studying mechanical engineering", how is it possible you don't know to calculate the volume of a cylinder? Again, if this is your final year of mechanical engineering, it scares the living hell out of me as to what qualifies as an engineer in your country. Sweet God, we learn how to make this very rudimentary geometric calculation as 10 year olds in 5th grade.

 

par its funy the way you sound incase you dont know there are some knowladge you gain on the job that you would never know in school. i didnt ask becauce i dont know how to calculate the volume of my cilynder, or because i dont know how to calculate bouyant force which obviously is the major reason why every thing floats in water. but i asked because there are some things u people may know that i dont know. so if ur out of contribution stop trying to make me look daft cos u also post threads on this forum which clearly shows that you equaly dont know it all....ok

 

Wemdoug, I must disagree with you here. When it comes to boat design, PAR may not "know it all", but he comes damn close. I would listen to him. Height times pi times radius squared = volume of cylinder. Or there are calculators on-line that can do it for you.

http://www.online-calculators.co.uk/volumetric/

 

thanks for telling me what i never asked for hoytedo

 

The more specific, precise, and detailed your questions, the better answers you will tend to get.

Your initial question is far too vague and non-specific.

Your first post does sound like you are asking the basic question of how to calculate displacement as you have not given any background or specifics on what you are asking. At least post a quick sketch with overall dimensions, basic requirements and constraints, conditions & location it will operate in, etc.

 

It does appear you did ask, though at this point I think comprehension is the big question . . .

 

It can carry the weight of water it displaces when submerged minus the weight of the pontoon.

How to calculate that is simple geometric math.

Safely, it can only carry half of that.

Even safer would be only 1/3.

-Tom

 

The rule of thumb, which was pointed out on the previous page, is full up vessel weight, stores, gear, maximum crew, cooler full of beer, full tanks, engine, everything, plus a healthy safety margin, with the pontoons half submerged, or less. The weight study is one of the first things to preform in a new design. Cylindrical pontoons aren't especially efficient, but are easy to make. You'll get much more capacity and if shaped properly, efficiency from flat or V bottom pontoons, though they are harder to make.

 

par am sory if i pissed you off but your last post is eaxctly wat i was lookin for (a profesional advice). next time i think ill be a bit more presise when am asking any question cos its clearly proven that no one got me clearly. and to all other contributors ike, gonzo,nurb, hoytedo
thanks.now i know that if performance in terms of weight is paramount cylindricall pontoons are not the best option.

 

par thank you too u all are the best