questions on weight carring capacity

[northrox]

i need to design a floating object with max dimensions of 40*20*25 cm for fresh water.capable of loading minimum 3 kg of load an subsequent loading of 500 g after 20 secs.

what sud i consider to make it maximum load carring with minimum weight an least submersion .

[Submarine Tom]

Not enough information.

More details please.

-Tom

[Mr Efficiency]

What's with the 20 seconds The shape with the most bouyancy per unit of immersion will be brick-like, but I don't know whether it just has to float or move

[Submarine Tom]

Who cares how much submersion, it just has to float right?

So a wooden block, 40W X 20H X 25D cm, 3 kg block in the middle and throw 0.5 kg more on after 20 seconds.

Poof, done.

Something missing here.

More info northrox

-Tom

P.S. Where's Indi?

[Mr Efficiency]

Originally Posted by Submarine Tom

Who cares how much submersion, it just has to float right?

So a wooden block, 40W X 20H X 25D cm, 3 kg block in the middle and throw 0.5 kg more on after 20 seconds.

Poof, done.

Something missing here.

More info northrox

-Tom

P.S. Where's Indi?

Er, the OP "cares" about it apparently.

[northrox]

its a model. i have to design some thing tat takes max load. material no bound. and floats with max 4\5 of its drafts submerged. it has to take a min. of 3 kg load. an then i have to test it for increasing loads. now my question is what sud i consider while i have to design it.

the lighter the model the better. wood is heavy. i was thinking of using sheet metal or plastic . i will be loading it with sand bags of 500 gms for testing.

[Submarine Tom]

Originally Posted by Mr Efficiency

Er, the OP "cares" about it apparently.

Mr E,

My response was referring to the OP.

Sorry if you misunderstood me to have directed it to you.

There wasn't enough information to make a significant comment.

It wasn't clear (to me) what roll submersion played.

You figure it out.

-Tom

[DCockey]

Originally Posted by northrox

its a model. i have to design some thing tat takes max load. material no bound. and floats with max 4\5 of its drafts submerged. it has to take a min. of 3 kg load. an then i have to test it for increasing loads. now my question is what sud i consider while i have to design it.

the lighter the model the better. wood is heavy. i was thinking of using sheet metal or plastic . i will be loading it with sand bags of 500 gms for testing.

College project? If so what course?