Cape Ann HV Kayak- particulars

Cape Ann HV (high volume)
Technical specs...

Efficient, high volume cruiser kayak for taller, larger paddlers and 'expedition' gear loading.
Largest internal volume, displacement and cockpit space model

Cape Ann HV description | MATERIALS
CAD views
Smaller displacement version of this kayak: Cape Ann

Property	English	Units	Metric	Units	Comments
Length Overall	18.5	ft	5,638	m	length from bow to stern as designed
Beam Overall	24	in	60,96	cm	widest part of kayak
Draft	4.5	in	11,43	cm	baseline to Designed Water Line (DWL)
Volumetric Properties
Displacement	337.3	lb	153,3	kg	at DWL
Volume	5.27	ft^3	149,2	liters	displacement in cubic feet or liters of sea water
Wetted Surface	24.59	ft^2	2,284	m^2	underwater surface area to DWL
LCB	8.859	ft	2,7	m	longitudinal center of buoyancy from x=0
LCB % LWL	52.51	%		%	LCB as a percetage of waterline length from x=0
VCB	0.228	in	6,94	cm	vertical center of buoyancy from baseline
Waterplane Properties
Waterplane area	20.46	ft^2	1,9	m^2	at DWL
LCF	8.66	ft	2,63	m	longitudinal center of flotation from x=0
LCF % LWL	51.33	%		%	LCF as a percetage of waterline length from x=0
LWL	16.87	ft	5,141	m	length of waterline; same as DWL
BWL	22.7	in	57,66	cm	beam of waterline
Sinkage	109.1	lb/in	19,52	kg/cm	pounds displaced per one inch of sinkage
Form Coefficients (no units, same for metric)
Cb	0.44				block
Cm	0.825				midship
Cp	0.533				prismatic
Cwp	0.64				waterplane
Area/Displacement	8.11				Area / Displacement ratio [ft^2/(ft^3)^2/3]
Length / Beam	8.91				Length / Beam ratio [LWL / BWL]
Miscellaneous
Area of cockpit	2.97	ft^2	0,275	m^2	for cockpit template in plans (red)
Circumference	6.76	ft	2,06	m	cockpit
Depth in front	14	in	35,56	cm	inside cockpit
Depth in rear	11	in	27,94	cm	inside cockpit
Deck area	27.56	ft^2	2,56	m^2	includes cockpit area
Hull area	36.87	ft^2	3,42	m^2
Kayaker Fit & Loading	Large and tall paddlers 240 lb min. -> 277 lb ideal -> 360 lb max. (109,2 -> 126 -> 163.8 kg) Recommended max. load: 400lb (182 kg) Paddler height: between 6' 2" and 6' 7" (188 -> 200,6 cm)
x=0 the start of waterline (DWL) at bow

All English units (ft / in) in the plans have a Metric (m / cm) eqivalent !

Material

Wood strips - assumes bead & cove strips
need only 5/8 or 3/4" strips, not both.

Unit converter

Coverage + 'fudge factor' for waste	Surface area (ft²) (m²)	Total length of 5/8" strips (ft) (m)	Number of 5/8"x 16ft strips	Total length of 3/4" strips (ft) (m)	Number of 3/4"x 16ft strips
Total area of kayak (+ cockpit)	64.44 (5,98)	1546 (471)	96	1237 (377)	77
Total area + 5%	67.66 (6,28)	1623 (495)	101	1299 (396)	81
Total area + 10%	70.88 (6,58)	1701 (518)	106	1361 (414)	85

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

Coverage of fiberglass (plain weave e-glass)	yards (yd)	feet (ft)	meters (m)	How to estimate
Deck - 4 oz. e-glass	13.3		12,2	two times the kayak length + 1 yard (1m)
Hull - 6 oz. e-glass	13.3		12,2	two times the kayak length + 1 yard (1m)
2" wide glass tape		83	25	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 60" width of the 4oz. glass to get the extra hull abrasion patch material
If 60" 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): 3 gallons

Notes & Tips:

Usage may vary (+-) 0.5 gallon as a result of the thickness of lay-up, fillet size, unused batches, spills, drips, 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
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Acton, MA 01720
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Tel: 781-481-9261

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