| Q300S Speed & 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 |
0.3250 |
ft |
| Trim
(FP-AP) |
0.0000 |
Deg |
| Heel |
0.0000 |
Deg |
| Volumetric Properties |
| Volume |
3.5110 |
ft^3 |
| Displacement |
224.7360 |
lb |
| Wetted Surface |
18.7510 |
ft^2 |
| LCB
(Center of Buoyancy from FP) |
6.5337 |
ft |
| VCB
(from Baseline) |
0.2019 |
ft |
| Draft |
0.3248 |
ft |
| Waterplane Properties |
|
|
| Area |
16.077 |
ft^2 |
| LCF
(Center of Flotation) |
6.4875 |
ft |
| VCF
(from Baseline) |
0.3250 |
ft |
| Moment to Trim
One Inch |
51.7871 |
ft-lb |
| Pounds per
Inch Immersion |
85.7456 |
lb/in |
| Change
in Displacement per Inch Trim Aft |
-0.0827 |
lb/in |
| il
(Longitudinal Inertia about LCF) |
125.5219 |
ft^4 |
| it
(Transverse Inertia about TCF) |
3.5573 |
ft^4 |
| LWL (Length on the Waterline) |
13.0000 |
ft |
| BWL
(Beam on the Waterline) |
1.9859 |
ft |
| Volume |
3.5110 |
ft^3 |
| Displacement |
224.7360 |
lb |
| Wetted Surface |
18.7510 |
ft^2 |
| LCB
(Center of Buoyancy from FP) |
6.5337 |
ft |
| VCB
(from Baseline) |
0.2019 |
ft |
| Draft |
0.3248 |
ft |
| Metacentric
Heights |
| Longitudinal
KM |
35.9479 |
ft |
| Longitudinal
GM |
35.9479 |
ft |
| Transverse
KM |
1.2149 |
ft |
| Transverse GM |
1.2149 |
ft |
| Form
Coefficients |
| LWL / BWL |
6.5462 |
|
| LWL
/ Draft |
40.0246 |
|
| BWL / Draft |
6.1142 |
|
| Cb
(Block) |
0.4188 |
|
| Cm (Midship) |
0.7717 |
|
| Cp
(Prismatic) |
0.5426 |
|
| Cvp (Vertical
Prismatic) |
0.6725 |
|
| Cwp
(Waterplane) |
0.6228 |
|
|
Where To Try
