Fishing Vesels stability

[Ad Hoc]

mallias.s

Firstly, that seems a very short roll period, have you done it correctly?

Secondly, the nomogram does not go down to the small beam that you have for your boat, 2.5m. So you can't use this!

[mallia.s]

It is quite a short roll period. I believe I have done it correctly. An average 12.65s for 5 oscillations -> 2.53s for each oscillation.

Meanwhile I have gone through this:

http://ir.library.oregonstate.edu/js...%20779_ocr.pdf

Which calculates the time for 1 oscillation a bit differently...

What do you think?

Thanks again

[Guillermo]

A 2.53 sec rolling period for a 2.5 m beamed boat looks quite right to me. That makes "f" to be close to a value of 1, which is precisely the top figure the spanish and french administrations use for small fishing vessels. The rolling period in seconds being more or less equal to the beam in meters is also adequate for a sailing boat.

Cheers.