FREE!ship Plans for the Goodnow Kayak
by Bryan Hansel
The 16’ 8” Goodnow kayak is stunning. It’s lines flow beautifully and it begs to be built and paddled. At 17 5/8” wide, I’d have a hard time fitting into it, so I decided to model the kayak for a possible upscale and build. Included here is the FREE!ship file for your download and some information about the kayak.
The Goodnow kayak appears in Mark Starr’s Building a Greenland Kayak
Kaper Numbers
Kaper is a resistance program used by Sea Kayaker Magazine
- 2 knots - 0.832
- 3 knots – 1.739
- 4 knots – 3.253
- 4.5 knots – 4.818
- 5 knots – 7.351
Hydrostatics
These hydrostatics are generated for a typical Midwestern male at 171 pounds.
- Length over all :16.679 [ft]
- Beam over all : 1.478 [ft]
- Design draft : 0.405 [ft]
- Midship location : 8.339 [ft]
- Volume properties:
- Displaced volume : 3.228 [ft3]
- Displacement : 0.092 [tons]
- Block coefficient :0.3950
- Prismatic coefficient :0.5126
- Vert. prismatic coefficient :0.6600
- Wetted surface area :16.576 [ft2]
- Longitudinal center of buoyancy: 7.912 [ft]
- Longitudinal center of buoyancy:-3.027 [%]
- Vertical center of buoyancy : 0.255 [ft]
- Midship properties:
- Midship section area : 0.446 [ft2]
- Midship coefficient :0.7707
- Waterplane properties:
- Length on waterline :14.110 [ft]
- Beam on waterline : 1.428 [ft]
- Waterplane area:12.062 [ft2]
- Waterplane coefficient :0.5985
- Waterplane center of floatation: 8.013 [ft]
- Entrance angle : 4.028 [degr.]
- Transverse moment of inertia : 1.350 [ft4]
- Longitudinal moment of inertia :103.04 [ft4]
- Initial stability:
- Transverse metacentric height : 0.673 [ft]
- Longitudinal metacentric height:32.175 [ft]
- Lateral plane:
- Lateral area : 4.387 [ft2]
- Longitudinal center of effort : 8.001 [ft]
- Vertical center of effort : 0.237 [ft]
Files
There are two files for this kayak. If you want to visualize the kayak in 3D, but don't have FREE!ship, then a VRML (.wrl) file is below for you to click on. You will need a VRML extension for your browser. I recommend Cortona VRML from www.parallelgraphics.com. The second file is a FREE!ship file.
