F-85SR Super Racer
There had been some interest received in regards to a design for the NZ 8.5 rule, and while I usually prefer not to design to rules, the 8.5 rule is a simple one, plus it limits rig size to where design and crew skills are more important than just brute power.
The F-82 is already a good performer under the 8.5 rule (race example), even though smaller and with a roomy cruising style cabin, so I took a little time to explore using the F-82 as the basis for a more race orientated F-85SR (for experienced sailors only). This will have longer hulls and a taller rig to fit the rule, and a cut down cabin, so it will be significantly faster again.
The F-85SR will use an extended F-22 rudder blade (using the F-22 rudder case), a deeper daggerboard, and will also have the F-32SR lifting foils as an option.
The F-32SR lifting foil - can be shortened and also used on the F-85SR
Standard racing cabin is a short cuddy cabin, but the standard F-82 length cruising cabin is optional. Float rudders will be optional, and float sterns are squared off to allow this, but I think float rudder are more complicated for only limited benefits, while all round performance may suffer.
The main advantage of the F-85SR will be the greatly increased performance over the F-82/F-25C, with its taller rig and floats that have a massive 600lbs more buoyancy. Plus it stills retain genuine trailerabilty (in minutes, not hours) and a roomy cabin, so it can still double as a cruiser (with care) when needed. It will be a tough boat, everything will work as it should, all of which will contribute to an excellent resale value once its racing days are over, plus it would be much easier to sell than a pure racer with no room.
Basic dimensions are
L.O.A. - 8.5m (27' 10")
B.O.A. - 6m (19' 8")
Mast Height - 11.3m (37')
Sail Area (main and jib) - 42.8sq.m (461sq.ft)
The F-85SR began as a concept boat, but there was enough interest to turn it into an available design. However, being very busy with the production F-22 and some other matters , the F-85SR has been a weekend task over the past year, but it was possible to start building. The very detailed F-82 plans were initially used as the basis for building, but the F-85SR plans are now complete for floats, main hull and beams. The F-85SR lines (as DXF files only) are also now complete, and the remaining plan sheets will be completed over the next few months.
DXF files can be used to print out full size patterns via a local Plan Printer, or, better still, used by a local CNC machine to cut out the form frames or bulkhead templates. This is the best way to make form frames now, even with older plans. Some full size paper patterns will still be included for the beams, and a few other miscellaneous items.
Phill Brander's first F-85SR float halves
Lifting foil case installed
and now joined ready for exterior laminating.
A taller 'unlimited' rig with a 12.6m (41.3') tall mast) is also optional, in addition to the standard 11.3m mast (that complies with the NZ 8.5 Rule). This has 515sq.ft. (48sq.m) of sail area and will turn the F-85SR into a potential line honors machine/screamer in any fleet. However, this tall rig version is intended for racing by experienced sailors ONLY, and is not suitable for family cruising.
The F-85SR plans, along with DXF files, can now be purchased via
http://www.f-boatmart.com/product.php?productid=16248&cat=3&page=1
Ian Farrier
Farrier Marine (NZ) Ltd
Farrier Marine, Inc
Clive Kennedy's first F-85SR float joined
and now with foam bow caps fitted, faired, and with primer
