Q600X Hydrostatic Data

Resistance Data - Using KAPER by John Winters

KAPER is a mathematical performance prediction program designed by John Winters exclusively for the design and evaluation of small lightweight human powered water craft. It is based on over 200 ship, boat and model tests of light displacement, shallow draft, low Beam/Length ratios and refined to suit tank test data from both canoes and kayaks.

The first edition of KAPER was created in 1989 and limited to high beam/length ratios common to canoes. It was based upon Admiral David Taylor's formula for ship resistance modified to suit low Displacement/Length ratio hulls and canoe test data. After many permutations the existing program was refined to its current state in 1996. You may have seen the KAPER data in the kayak reviews in Sea Kayaker Magazine.

Input Parameters
BL-WL Distance at Amidships 0.3700 ft
Trim (FP-AP) 0.0000 Deg
Heel 0.0000 Deg
Volumetric Properties
Volume 4.293 ft^3
Displacement 274.757 lb
Wetted Surface 21.790 ft^2
LCB (Center of Buoyancy from FP) 8.4689 ft
VCB (from Baseline) 0.2291 ft
Draft 0.3715 ft
Waterplane Properties 
Area 17.267 ft^2
LCF (Center of Flotation) 8.3791 ft
VCF (from Baseline) 0.3700 ft
Moment to Trim One Inch 69.2287 ft-lb
Pounds per Inch Immersion 92.0918 lb/in
Change in Displacement per Inch Trim Aft 1.0394 lb/in
il (Longitudinal Inertia about LCF) 210.41834 ft^4
it (Transverse Inertia about TCF) 2.7689735 ft^4
LWL (Length on the Waterline) 16.2863 ft
BWL (Beam on the Waterline) 1.6710 ft
Metacentric Heights
Longitudinal KM 49.2424 ft
Longitudinal GM 49.2424 ft
Transverse KM 0.8741 ft
Transverse GM 0.8741 ft
Form Coefficients
LWL / BWL 9.7463
LWL / Draft 43.8392  
BWL / Draft 4.4980
Cb (Block) 0.4246  
Cm (Midship) 0.7820
Cp (Prismatic) 0.5430  
Cvp (Vertical Prismatic) 0.6693
Cwp (Waterplane) 0.6345