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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 !

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Material

  Wood strips - assumes bead & cove strips
need only 5/8 or 3/4" strips, not both.
Unit converter
Metric / Standard 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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Last page update: 27 June 2014