Copyright 2011 CONRAD YACHTS All Rights Reserved
Hull Characteristics.
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(21 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 27 feet long, 29 feet including the swim platform.
5.  The Tuna 29 Offshore hull is designed to carry a single or twin outboards.
6.   Preliminary design includes a centre console, the rest of the plan is open, to be
organized and equipped as necessary.
Tuna 29 CC - #15
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  • Hull length
27 feet
  • LOA
29 feet
  • Beam
9.5 feet
  • Draft - hull only
19 inches
  • Draft - engine leg down
32 inches
  • Deadrise at transom
21 degrees
  • Minimum cockpit depth - no rail
29 inches
  • Fuel capacity
120 USG
  • Power - single or twin
200 - 600 hp
  • Capacity ( people)
  • Approx. aluminum weight
3,500 lb
  • Design displacement
6,000 lb
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 9.5'.
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 - 1/4"   - 5086 H116
Sides    - 3/16" - 5086 H116
Cabin    - 1/8"  - 5052 H32
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necassary to view pdf drawing files.
1. Recommended power for this hull is from 200 hp to 500 hp, single installation.
2. Custom alterations will be considered (additional and/or different configuration of lockers or seating).
3. Cockpit is self-bailing.
Other Features.
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Assembly Drawings
( for
detailed construction study only )
Digital Package:                                             
  1. Assembly drawings.
  2. Parts list.
  3. Nest.
  4. The use of the cutting files-CNC cutting.     
please enquire
Building kit:                                                         
  1. All plate parts, cut and formed.
  2. Assembly drawings.
** Pending current price check at time of purchase
please enquire
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