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Hull Characteristics.
Tuna 25 FC hull is almost identical to the WA version.
1. The hull can be best described as a modified constant deadrise form, the most trusted and
well behaved hullform ever developed.
2. Relatively high deadrise at transom(19.5 degrees), makes her much more comfortable in
sea way than the majority of boats this size, whose deadrise is generally in the 13 to 18 degrees
range.
3. The innovative, variable width chine flats are 10” wide aft, gradually narrowing to 3” , from
amidships forward. The wide chine flats aft give the hull extra lateral stability, while narrow chine
flats forward, allowing the hull to move through the water, prevent slamming against oncoming
chop.
4. The hull itself is 25 feet long, 27 feet including the engine bracket/swim platform. Including
the outboard engine, the boat is just over 29 feet long.
Tuna 25 FC hull is almost identical to the WA version.
1. The hull can be best described as a modified constant deadrise form, the most trusted and
well behaved hullform ever developed.
2. Relatively high deadrise at transom(19.5 degrees), makes her much more comfortable in
sea way than the majority of boats this size, whose deadrise is generally in the 13 to 18 degrees
range.
3. The innovative, variable width chine flats are 10” wide aft, gradually narrowing to 3” , from
amidships forward. The wide chine flats aft give the hull extra lateral stability, while narrow chine
flats forward, allowing the hull to move through the water, prevent slamming against oncoming
chop.
4. The hull itself is 25 feet long, 27 feet including the engine bracket/swim platform. Including
the outboard engine, the boat is just over 29 feet long.
| Tuna 25 FC Full Cabin |
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The full cabin model is in the initial stages of
construction.
Model specific materials, for this version will be
posted as they become available.
Click on the drawing image on the left to open
the free full size study drawing, in pdf format.
construction.
Model specific materials, for this version will be
posted as they become available.
Click on the drawing image on the left to open
the free full size study drawing, in pdf format.
Pricing & Specifications
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1. All major hull structure components are designed and calculated to conform to the requirements of ABS(American Bureau of
Shipping).
2. The maximum beam is 8’-6". This is the legal width limit for a trailable boat in B.C., without special permits.
3. Whenever possible, welds are avoided: entire cockpit sole(from the bow to the engine bracket) is made of only two lengthwise
halves, welded together, then welded to topsides(side plates) around the perimeter, and slot welded to structural members
underneath. Each hull half is one piece, so are side plates. This approach yields a much fairer hull.
4. The hull is framed longitudinally, which, again, produces a fairer hull, eliminating the "hungry horse" look of many metal boats.
5. The structure consists of longitudinal girders and transverse frames, which “egg crate” into one another to make assembly
quick and accurate.
6. I believe in being able to access and remove the fuel tank, if necessary, even after the boat is completed. This is accomplished
by locating the fuel tank under a “soft patch” in the cockpit sole.
7. Alloys used are all top marine grade 5000 series.
Bottom - 1/4" - 5086 H116
Sides - 3/16" - 5086 H116
Cabin - 1/8" - 5052 H32
Shipping).
2. The maximum beam is 8’-6". This is the legal width limit for a trailable boat in B.C., without special permits.
3. Whenever possible, welds are avoided: entire cockpit sole(from the bow to the engine bracket) is made of only two lengthwise
halves, welded together, then welded to topsides(side plates) around the perimeter, and slot welded to structural members
underneath. Each hull half is one piece, so are side plates. This approach yields a much fairer hull.
4. The hull is framed longitudinally, which, again, produces a fairer hull, eliminating the "hungry horse" look of many metal boats.
5. The structure consists of longitudinal girders and transverse frames, which “egg crate” into one another to make assembly
quick and accurate.
6. I believe in being able to access and remove the fuel tank, if necessary, even after the boat is completed. This is accomplished
by locating the fuel tank under a “soft patch” in the cockpit sole.
7. Alloys used are all top marine grade 5000 series.
Bottom - 1/4" - 5086 H116
Sides - 3/16" - 5086 H116
Cabin - 1/8" - 5052 H32
1. Transom height is 25”. Using the engine bracket, instead of mounting the engine(s) on the transom, allows the engine(s) to sit
a bit higher and further aft of the end of the hull. This improves the "hole shot" and allows the propeller to work in less turbulent
water flow. The use of a 30" leg is not necessary, although possible if preferred.
2. Recommended power for this hull is from 150 hp to 500 hp, single or twin installation.
Tuna Walkaround with a single 300 hp Mercury Verado achieves a speed of 50 m/hr, plus.
3. Custom alterations will be considered (additional and/or different configuration of lockers or seating).
4. Cockpit is self-bailing.
5. Built into the cockpit sole, on centre, is a 50 USG fish hold, with a flush lid, built-in drain and a removable liner.
6. It is possible to make the boat unsinkable(not required legally at this size), by filling the unused cavities under cockpit sole with
foam.
a bit higher and further aft of the end of the hull. This improves the "hole shot" and allows the propeller to work in less turbulent
water flow. The use of a 30" leg is not necessary, although possible if preferred.
2. Recommended power for this hull is from 150 hp to 500 hp, single or twin installation.
Tuna Walkaround with a single 300 hp Mercury Verado achieves a speed of 50 m/hr, plus.
3. Custom alterations will be considered (additional and/or different configuration of lockers or seating).
4. Cockpit is self-bailing.
5. Built into the cockpit sole, on centre, is a 50 USG fish hold, with a flush lid, built-in drain and a removable liner.
6. It is possible to make the boat unsinkable(not required legally at this size), by filling the unused cavities under cockpit sole with
foam.
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