"pirouet" out of a hard-on-the-wind beat? Nonsense.
My 1978 CAL 34III will steer herself all day and night in light winds or
25-30 knots. Just get the sails right and lock the wheel.
I like the encapsulated keel with deep sump. Would not have a bolt on keel with a shallow bilge.
After 13 years I still like this boat, very nimble and well balanced.
I am sure the O'Day is fun too, and neither of them is a blue water boat IMO.
Russ



Rich Hampel wrote:

The draft of the Cal is listed as 4' 9", compared with 5' 7" for the
O'Day. Would this make it somewhat more tender,


YES and prone to "pirouet" out of a hard-on-the-wind beat, also would
be more easilly broached. Although the VCG (vertical center of gravity)
is not listed, I certainly do a coarse roll period test on both: just
rock the boat back on forth and measure the roll oscilations per unit
time. http://www.image-ination.com/sailcalc.html


but perhaps faster
under light winds?
YES but wont point as well as the ODay.





More questionable for blue water cruising?


Since the capsize ratio is near 2.0 on both boats, neither would be a
good blue water boat but sind the Oday has a broader beam (11.8) would
have better dynamic stability. The Cal being a shoal draft with narrow
beam would not be a good stable platform and would be more prone to
roll over/capsize in overwhelming conditions.

These are nearly identical boats (by the 'numbers') and the D/LWL value
of the Oday will make her accelerate a bit faster ... a good thing if
you sail in mostly light winds.

"pirouet" out of a hard-on-the-wind beat? Nonsense.
My 1978 CAL 34III will steer herself all day and night in light winds or
25-30 knots. Just get the sails right and lock the wheel.
I like the encapsulated keel with deep sump. Would not have a bolt on keel with a shallow bilge.
After 13 years I still like this boat, very nimble and well balanced.
I am sure the O'Day is fun too, and neither of them is a blue water boat IMO.
Russ



Rich Hampel wrote:

The draft of the Cal is listed as 4' 9", compared with 5' 7" for the
O'Day. Would this make it somewhat more tender,


YES and prone to "pirouet" out of a hard-on-the-wind beat, also would
be more easilly broached. Although the VCG (vertical center of gravity)
is not listed, I certainly do a coarse roll period test on both: just
rock the boat back on forth and measure the roll oscilations per unit
time. http://www.image-ination.com/sailcalc.html


but perhaps faster
under light winds?
YES but wont point as well as the ODay.





More questionable for blue water cruising?


Since the capsize ratio is near 2.0 on both boats, neither would be a
good blue water boat but sind the Oday has a broader beam (11.8) would
have better dynamic stability. The Cal being a shoal draft with narrow
beam would not be a good stable platform and would be more prone to
roll over/capsize in overwhelming conditions.

These are nearly identical boats (by the 'numbers') and the D/LWL value
of the Oday will make her accelerate a bit faster ... a good thing if
you sail in mostly light winds.

The draft of the Cal is listed as 4' 9", compared with 5' 7" for the
O'Day. Would this make it somewhat more tender,
YES and prone to "pirouet" out of a hard-on-the-wind beat, also would
be more easilly broached. Although the VCG (vertical center of gravity)
is not listed, I certainly do a coarse roll period test on both: just
rock the boat back on forth and measure the roll oscilations per unit
time. http://www.image-ination.com/sailcalc.html
but perhaps faster
under light winds?
YES but wont point as well as the ODay.

More questionable for blue water cruising?
Since the capsize ratio is near 2.0 on both boats, neither would be a
good blue water boat but sind the Oday has a broader beam (11.8) would
have better dynamic stability. The Cal being a shoal draft with narrow
beam would not be a good stable platform and would be more prone to
roll over/capsize in overwhelming conditions.

These are nearly identical boats (by the 'numbers') and the D/LWL value
of the Oday will make her accelerate a bit faster ... a good thing if
you sail in mostly light winds.

Thanks to all for the helpful information. I'm talking about boats in
the $20 - $30K price range, so I realize I probably won't get everything
I might like, or what I would expect from a $200K boat. Also, although
the boats seem to be in good contition, I haven't ordered surveys of any
of them so far, so don't really know what other expenses would be involved.

The draft of the Cal is listed as 4' 9", compared with 5' 7" for the
O'Day. Would this make it somewhat more tender, but perhaps faster
under light winds? More questionable for blue water cruising?

Thanks,
Jim

DSK wrote:
Jim Cate wrote:

As far as cruising speed in typical ( e.g., 15 - 20 knot) winds, under
full normal jib and main, average load, and equally experienced
captains, etc., would there be a significant difference in speed or
handling between the Cal and O'Day, both being in good condition and
similarly equipped?


To put the PHRF ratings already quoted into perspective, those numbers
are commonly equated to seconds per nautical mile. Lower is faster. So
if the O'Day rates 147 and the Cal rates 167, on very broad average
including all points of sail, the O'Day will be 20 seconds ahead for
every mile the two boats sail.

Please not that there are a lot of variables and there are conditions
where the Cal might be ahead of the O'Day, but that's what the ratings
mean.


... The (1978) Cal 34-III has a waterline of 26 ft, and the (1983)
O'Day has a 28'9" waterline, according to the spec sheets. Plugging
this into the formula (square root of wl times 1.34), I get a
predicted hull speed for the O'Day of around 7.185 knots, and 6.833
knots for the Cal.


Hull speed makes more difference motoring than sailing... the one
exception is reaching in moderate wind, when the hull shape, sail
carrying power, effects of waves, helm characteristics, etc etc, are not
in play.

Fresh Breezes- Doug King

Jim Cate wrote:
As far as cruising speed in typical ( e.g., 15 - 20 knot) winds, under
full normal jib and main, average load, and equally experienced
captains, etc., would there be a significant difference in speed or
handling between the Cal and O'Day, both being in good condition and
similarly equipped?

To put the PHRF ratings already quoted into perspective, those numbers
are commonly equated to seconds per nautical mile. Lower is faster. So
if the O'Day rates 147 and the Cal rates 167, on very broad average
including all points of sail, the O'Day will be 20 seconds ahead for
every mile the two boats sail.

Please not that there are a lot of variables and there are conditions
where the Cal might be ahead of the O'Day, but that's what the ratings mean.


... The (1978) Cal 34-III has a waterline of 26 ft, and
the (1983) O'Day has a 28'9" waterline, according to the spec sheets.
Plugging this into the formula (square root of wl times 1.34), I get a
predicted hull speed for the O'Day of around 7.185 knots, and 6.833
knots for the Cal.

Hull speed makes more difference motoring than sailing... the one
exception is reaching in moderate wind, when the hull shape, sail
carrying power, effects of waves, helm characteristics, etc etc, are not
in play.

Fresh Breezes- Doug King