Cape Ann Kayak- particulars

Cape Ann Single
Technical specs...

Fast recreational / touring kayak with excellent stability designed for larger built or top heavy kayakers of all skill levels.

Cape Ann description | MATERIALS
Larger displacement version of this kayak: Cape Ann HV

See Gallery2 for more photos
Click on pictures for a large, detailed version.

Property	English	Units	Metric	Units	Comments
Length Overall	18	ft	5,48	m	length from bow to stern as designed
Beam Overall	23	in	58,42	cm	widest part of kayak
Draft	4	in	10,15	cm	baseline to Designed Water Line (DWL)
Volumetric Properties
Displacement	270	lb	122,7	kg	at DWL
Volume	4.2	ft^3	119,1	liters	displacement in cubic feet or liters of sea water
Wetted Surface	22.1	ft^2	2,05	m^2	underwater surface area to DWL
LCB	8.65	ft	2,63	m	longitudinal center of buoyancy from x=0
LCB % LWL		%	52,8	%	LCB as a percetage of waterline length from x=0
VCB	2.4	in	6,19	cm	vertical center of buoyancy from baseline
Waterplane Properties
Waterplane area	18.45	ft^2	1,714	m^2	at DWL
LCF	8.49	ft	2,58	m	longitudinal center of flotation from x=0
LCF % LWL		%	51,8	%	LCF as a percetage of waterline length from x=0
LWL	16.37	ft	4,99	m	length of waterline; same as DWL
BWL	21.6	in	54,8	cm	beam of waterline
Sinkage	98.4	lb/in	17,6	kg/cm	pounds displaced per one inch of sinkage
Form Coefficients (no units, same for metric)
Cb	0.428				block
Cm	0.821				midship
Cp	0.521				prismatic
Cwp	0.625				waterplane
Area/Displacement	8.48				Area / Displacement ratio [ft^2/(ft^3)^2/3]
Length / Beam	9.09				Length / Beam ratio [LWL / BWL]
Miscellaneous
Area of cockpit	3.15	ft^2	0.292	m^2	for cockpit template in plans (small)
Circumference	6.96	ft	2,12	m	cockpit
Depth in front	13.0	in	33	cm	inside cockpit
Depth in rear	10.5	in	26,6	cm	inside cockpit
Deck area	26.0	ft^2	2,41	m^2	includes cockpit area
Hull area	32.0	ft^2	2,98	m^2
Kayaker fit & Loading	Large paddlers 180 lb min. -> 220 lb ideal -> 270lb max. (81 -> 100 -> 123kg) Recommended max. load: 320lb (146 kg) Paddler height: 6'4" feet and under (193cm)
x=0 the start of waterline (DWL) at bow

Material

Wood strips
assumes bead & cove strips and you need either the 5/8" OR 3/4" strips. Not both.

Unit converter

Coverage + 'fudge factor' for waste	Surface area (ft²) (m²)	Total length of 3/4" strips (ft) (m)	Number of 3/4"x 16ft strips	Total length of 5/8" strips (ft) (m)	Number of 5/8"x 16ft strips
Total area of kayak (+ cockpit)	58.11 (5,39)	1116 (340)	70	1395 (425)	87
Total area + 5%	61.01 (5,66)	1172 (357)	73	1464 (446)	92
Total area + 10%	63.92 (5,93)	1227 (374)	77	1534 (467)	96

Notes & Tips:

3/4" strip width = 1,9 cm
5/8" strip width = 1,58 cm
16 feet = 4,87 m
The accuracy of figures in the table is within (+ -) few feet
For custom calculation, see the Wood strip Calculator
The coverage based on the "+ 10%" is most recommended
Estimate wood for deck inlays as a percentage of the deck surface area
Ideal strip length is between 10 - 16 feet

Fiberglass coverage
assumes complete coverage of inside and outside of hull and deck to make full sandwich core

Coverage of fiberglass (plain weave e-glass)	yards (yd)	feet (ft)	meters (m)	How to estimate
Deck - 4 oz. e-glass	13		11,9	two times the kayak length + 1 yard (1m)
Hull - 6 oz. e-glass	13		11,9	two times the kayak length + 1 yard (1m)
2" wide glass tape		81	24,7	four times the kayak length + 9 ft (3m)

Notes & Tips:

Minimum width of fabric is 38" - will no allow for full hull abrasion patch
Order 50" width of the 4oz. glass to get the extra hull abrasion patch material
If 50" fabric is not available, order one 'waterline length - LWL' of additional cloth (any weight)
Round figures to the nearest higher number when ordering fabric
The 6oz. glass can always replace the 4oz.
See different types of reinforcement fabrics
Glass tape is sold in 'feet' and cloth in yards (in the US)
Glass tape is used to bond the kayak shells and for additional stem reinforcement

Epoxy

Minimum total volume of epoxy mix (resin + hardener): 2.5 to 3 gallons

Notes & Tips:

Usage may vary (+-) 0.5 gallon as a result of the thickness of lay-up, fillet size, unused batches, spills, bad (unmixed) batches, care in application (overapplication), additional composite components such as coamings, hatch seals, rudders etc...
If epoxy is sold by weight, the density of epoxy is very close to water (1dm³ = 1 liter = 1kg)
1 gallon = 3.8 liters
Learn about epoxy

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Mail:
Vaclav Stejskal
58 Wood Ln.
Acton, MA 01720
USA
Tel: 781-481-9261

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