| Copyright 2011 CONRAD YACHTS All Rights Reserved |
Hull Characteristics.
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 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 wide aft, gradually narrowing , 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 it from
slamming against oncoming chop.
4. The hull itself is 21'-5" long, 23'-7" including the engine bracket/swim platform.
5. 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
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 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 wide aft, gradually narrowing , 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 it from
slamming against oncoming chop.
4. The hull itself is 21'-5" long, 23'-7" including the engine bracket/swim platform.
5. 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
| Tuna 21 SC - #17 Sport Cabin |
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Click images to enlarge
Specifications
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'.
3. Whenever possible, welds are avoided.
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(s), if necessary, even after the boat is completed. This is
accomplished by locating the fuel tanks under a “soft patches” in the cockpit sole.
7. Alloys used are all top marine grade 5000 series.
Bottom - 3/16" - 5086 H116
Sides - 3/16" - 5086 H116
Cabin - 1/8" - 5052 H32
(American Bureau of Shipping).
2. The maximum beam is 8'.
3. Whenever possible, welds are avoided.
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(s), if necessary, even after the boat is completed. This is
accomplished by locating the fuel tanks under a “soft patches” in the cockpit sole.
7. Alloys used are all top marine grade 5000 series.
Bottom - 3/16" - 5086 H116
Sides - 3/16" - 5086 H116
Cabin - 1/8" - 5052 H32
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1. Custom alterations will be considered (additional and/or different configuration of lockers or seating).
2. Built into the cockpit sole, on centre, can be a fish hold, with a flush lid, built-in drain and a removable liner.
3. It is possible to make the boat unsinkable(not required legally at this size), by filling the unused cavities under
cockpit sole and in the sides, with foam.
2. Built into the cockpit sole, on centre, can be a fish hold, with a flush lid, built-in drain and a removable liner.
3. It is possible to make the boat unsinkable(not required legally at this size), by filling the unused cavities under
cockpit sole and in the sides, with foam.
Construction.
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Pricing
Other Features.
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