Corto
Member
I now that sounds crazy, but I am looking for the GZ curve (hope that's the right translation from Italian) of a MK2 fin keel, standard rig Corribee 21. Maybe someone can help me. Many Thanks
Simone
Simone
Corribee MK2 1980 gz curves
- Thread starter Corto
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Tranona
Well-Known Member
Most unlikely one exists - although you might contact Tony Tucker whose father designed the boat www.tucker-designs.com
Roberto
Well-Known Member
Hello Simone,
with a boat that size, I think the best (and more realistic) thing would be to make a heeling test and measure the righting moments yourself. The procedure is reasonably easy, just moor the boat next to a quay with two long bow and stern mooring ropes, plus a halyard from a given height oup the mast that comes to the pontoon. Begin pulling the halyard while measuring the heeling angle and the force applied by the halyard (possibly a sturdy fishing scale can be enough).
A bit of triangulation and trig will give you the stability curve expressed in righting moment kg.m.
Should you need additional precision, then weigh the boat, compute GZ arms (simple division), then add the weight of the crew to the displacement to obtain the crewed boat RMs; they will not be theoretically perfect as immersed volume changed, but perfect for most mast calculation purposes.
regards
r
with a boat that size, I think the best (and more realistic) thing would be to make a heeling test and measure the righting moments yourself. The procedure is reasonably easy, just moor the boat next to a quay with two long bow and stern mooring ropes, plus a halyard from a given height oup the mast that comes to the pontoon. Begin pulling the halyard while measuring the heeling angle and the force applied by the halyard (possibly a sturdy fishing scale can be enough).
A bit of triangulation and trig will give you the stability curve expressed in righting moment kg.m.
Should you need additional precision, then weigh the boat, compute GZ arms (simple division), then add the weight of the crew to the displacement to obtain the crewed boat RMs; they will not be theoretically perfect as immersed volume changed, but perfect for most mast calculation purposes.
regards
r
Corto
Member
Many Thanks, ti ringrazio anche per le risposte che mi hai dato su ADV!
Corribee Boy
Well-Known Member
If you ever get an answer, I'd be very interested in seeing it too!
Never had mine past about 40 degrees or so, with water coming into the cockpit: Funnily enough I wasn't trying to read the angle, I was trying to free the jammed genoa sheet that caused it.
Never had mine past about 40 degrees or so, with water coming into the cockpit: Funnily enough I wasn't trying to read the angle, I was trying to free the jammed genoa sheet that caused it.