A. 1979 34' Irwin
IRWIN 34 CITATION sailboat specifications and details on sailboatdata.com
B. 1979 35' Columbia.(Actually it is a Columbia 10.7) PHRF-168
COLUMBIA 35 sailboat specifications and details on sailboatdata.com
C. 1984 34' Hunter. PHRF 138
HUNTER 34 sailboat specifications and details on sailboatdata.com
The all have pretty much the same draft
and Columbia have pretty much the same PHRF rating and should be about as fast on daysails when similarly loaded. The Hunter should be significantly faster. Based on the EStarzinger formula on passage
their daily runs should be similar, with the Columbia averaging about 5-10nm less per day than the Hunter and the Irwin 2-4nm less.
In very light winds the Hunter and Irwin should perform similarly based on apparent wetted surface area and sail area. The Columbia should be slower based on the apparently greater wetted surface area.
All have moderately wide side decks, actually the Columbia and Hunter are actually pretty wide but obstructed.
The Hunter has a B&R rig which takes some extra tuning and it has swept back spreaders that are more prone to chafing the main.
The Columbia has the lowest liner and the Irwin the highest, but all are fairly moderate.
The Columbia is built significantly more heavily built for it's length and beam and the Hunter is somewhat lighter than the Irwin.
The Irwin's dinette is very oddly shaped and may not be very usable as a double at anchor
an probably not as a single
underway. The settee opposite looks short but you should check out if it is long enough for your needs.
The Columbia should get about 6.5nm/gal and the other 2 about 8 using diesel
engines and going 5kt.
The Irwin and Hunter have capsize
screens at 2 or just over, the Columbia is moderately under 2. For bombing around the Caribbean they should all be fine.
The Irwin has an offcenter companionway
. In rough going that would be a liability, I wouldn't worry about it as much in the Caribbean.
To me the interior
of the Irwin would be a deal killer, it wouldn't work well on passage.
"Objectively" I would see the Hunter and Columbia being about equal the tradeoff being the Columbia being more durable and the Hunter being somewhat faster but requiring more maintenance
because of the swept back spreaders and unusual rigging
My personal preference would be the Columbia. In order to improve its speed I would be willing to install a longer boom and a bowsprit
and replace the sails.