Cape Ann Expedition Kayak- particulars

Cape Ann Expedition
Technical specs...

Fast, seaworthy and well tracking cruiser. Also available with high deck for tall paddlers (Plans for high deck available by request).

Expedition standard deck (left) and Expedition High Deck (right)

Cape Ann Expediton description | MATERIALS
CAD view
Smaller displacement version of this kayak: Expedition SPORT

Finally got a chance to paddle the other day.....she moves as well as she looks. What a pleasure! - Bruce Crosby

Check out the Expedition 'Dolphin' that Jurgen Koppen has built to order and what it looks like in Eskimo rolling action

Property	English	Units	Metric	Units	Comments
Length Overall	18.5	ft	5,63	m	length from bow to stern as designed
Beam Overall	22	in	55,8	cm	widest part of kayak (high deck is 0.2" wider)
Draft	4 1/8	in	10,48	cm	baseline to Designed Water Line (DWL)
Volumetric Properties
Displacement	260	lb	118,2	kg	at DWL
Volume	4.06	ft^3	115	liters	displacement in cubic feet or liters of sea water
Wetted Surface	21.62	ft^2	2,008	m^2	underwater surface area to DWL
LCB	9.01	ft	2,746	m	longitudinal center of buoyancy from x=0
LCB % LWL	53.4	%	53,4	%	LCB as a percetage of waterline length from x=0
VCB	2.55	in	6,48	cm	vertical center of buoyancy from baseline
Waterplane Properties
Waterplane area	17.88	ft^2	1,661	m^2	at DWL
LCF	8.87	ft	2,705	m	longitudinal center of flotation from x=0
LCF % LWL	52.6	%	52,6	%	LCF as a percetage of waterline length from x=0
LWL	16.86	ft	5,14	m	length of waterline; same as DWL
BWL	20.6	in	51,3	cm	beam of waterline
Sinkage	95.4	lb/in	17,06	kg/cm	pounds displaced per one inch of sinkage
Form Coefficients (no units, same for metric)
Cb	0.417				block
Cm	0.801				midship
Cp	0.52				prismatic
Cwp	0.632				waterplane
Area/Displacement	8.49				Area / Displacement ratio [ft^2/(ft^3)^2/3]
Length / Beam	10.05				Length / Beam ratio [LWL / BWL]
Miscellaneous
Area of cockpit	2.97	ft^2	0,275	m^2	for cockpit template in plans (small)
Circumference	6.76	ft	2,06	m	cockpit
Depth in front	12 3/4	in	32,3	cm	inside cockpit
Depth front (high)	13.8	in	35,1	cm	Expedition with high deck
Depth in rear	10 1/4	in	26	cm	inside cockpit
Depth rear (high)	10.65	in	27,05	cm	Expedition with high deck
Deck area	25.2	ft^2	2,34	m^2	includes cockpit area
Deck area (high)	25.5	ft^2	2,369	m^2	Expedition with high deck
Hull area	33.1	ft^2	3,07	m^2
Kayaker fit & Loading	Medium to large paddlers 170 lb min. -> 210 lb ideal -> 260lb max. (77 -> 95.5 -> 118kg) Recommended max. load: 310lb (169 kg) Paddler height: 6'3" feet and under (191cm) Expedition High Deck - large cockpit knee and foot space for tall or long legged paddlers. High deck plans are shipped by request only. Paddler height: 6'2" to 6'7" (188 - 200cm)
x=0 the start of waterline (DWL) at bow

Material

Wood strips - assumes bead & cove strips

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)	58.38 (5,42)	1121 (342)	70	1401 (427)	88
Total area + 5%	61.2 (5,69)	1177 (359)	74	1471 (448)	92
Total area + 10%	64.2 (5,96)	1233 (376)	77	1541 (469)	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

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	25,3	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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