wrote:
I've got this report from Tayana for the Vancouver 460 Pilot
but don't know how good it is.

http://tayana46.tripod.com/safety.htm

If anybody can understand the Righting Arms vs Heel curve and
the numbers on this web page please let me know.

The consensus here seems to be that Tayanas in general are safer
bluewater yachts but I don't know if the pilothouse makes this
Vancouver 460 less stable or more dangerous.

Thanks again for your help.

I can understand this stuff. The stability of this boat
sucks to put it politely.

I've met Robert Harris. He's a good guy who has designed
some nice boats (the Vancouver 27/42 come to mind). But
this doesn't seem like one of the better built ones.

- Angle of vanishing stability of 110 degrees is pretty low.
I wouldn't go offshore in that sort of boat. Even fat
cruising Beneteaus manage better than 115 usually.

- the displacement is really quite high but it is to be
believed because they actually calculated it based on
measured drafts

- the ballast/displacement ratio is overly low, meaning a
tender boat with not enough stability

- the calculated GM is low (not a good thing; should be 3-
3.5' min.)

- the VCG is high (not good) at 1.32' above DWL. I suspect
the pilothouse is contributing to the high VCG

- the righting arm curve is ugly. The area under the 0 part
of the curve should not be nearly the same size as the
portion above. Maybe they were not including the pilothouse
in the calculation but I think it is there (see the bump in
the curve at ~70 degrees).

Summary: probably the pilothouse has made it too top heavy
to be an ideal offshore boat. Due to the size it won't be
knocked down or rolled easily, but if it does, it will take
a lot of wave action to re-right her and she will likely to
be upside down for quite some minutes. I would look elsewhere.

Evan Gatehouse