[Alberg30] Sally Ship

[Gordon LACO]

Hi there - 

We did something similar with our HMS Tecumseth in order to do the practical
part of her stability curves... we took about thirty people, weighed them
all and moved them from port to midships to starboard and noted the effect
on a long pendulum set up down the mainhatch.  Interesting stuff.

Gord
#426 Surprise


on 6/8/03 9:28 AM, George Dinwiddie at gdinwiddie at alberg30.org wrote:

> Robert Kirk wrote:
>> As I recall, the period was 13 seconds which translated to the old girl
>> still having pretty good stability. The longer (slower) the period, the
>> more unstable a given ship is for its size. (Obviously, if it doesn't
>> come back up the period is infinite. But that's another problem.)
> 
> Thirteen seconds seems pretty fast for running across a destroyer deck
> and back.
> 
>> I wonder what an Alberg's period is? Much shorter, of course. Maybe at
>> the next raftup we can have a contest. The shortest period boat has the
>> least weight aloft.
> 
> I've never timed it, but that's one of my first responses when aground.
> Running from shroud to shroud and leaning out can rock the boat enough
> to lift the keel off the bottom.  If the engine is in reverse at the
> time, you can back off.
> 
> - George

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