On 23 Oct 2004 12:26:51 GMT, Stephen Baker wrote:

Nicholas says:

Thanks for your input, all very scientific.

;-)

The boat is a proa, a multihull. The side says (there is only 1) is 4m
from the mast. Mast is 6m high. Righting moment could be rather high
as I was hoping for 50kg of water ballast in teh outrigger at 4m to
windward. 50L water ballast tank need not be full I guess.

The mast comes from a professional mast/spar maker.

The boat is a proa. Main hull is 23 long, 2 ft wide, boat weigh
unladen is less than 200kg. Not intending to break speed records.

I was hoping to do a comparison with a boat like a Hobie 14 cat. I
wonder what their mast dimsnsions woudl be, cannot recall the mast
section details of the windrush 12 cat that I used to sail, for some
reason never got around to measuring it. Feel that a hobie 14 - 12 has
simialr sail area/righting moment, is stayed out wide as per proa. So
what is good for that would be good for me.


If you can weigh the boat, each hull singly, that would help. Yopu don't have
to take it apart, just slide a scale under each hull in turn and record the
weights (yes, it can really be that simple.)
From that, and with the 50 litres of WB, a rough RM can be obtained.

Let us know...

Steve

Perhaps he could take a little help of old Archimedes! (do some maths on
displaced hull volume) ;o)


Morgan O.
Wondering if the man go'na bite this time too?