4 Line plane made from cardboard

Simple 4 line kite constructed out of Tyvek

Double-diamond quad under development.

A 2 or 4 line single skin hybrid traction kite. Including Surfplan sled design program.

Graceful 4-line dual arch.

A range of rectangular traction foils by Andy Smith.

Detailed 4 line kite plan also available in several downloadable formats.

A MS Windows application for calculating plans for this soft, single skin kite.

4-line sparred kite.

Unauthorised plan for the Flexifoil Skytiger.

4-line sparred kite by Dave Salmon.

4 line kite design

Unusual 4 line assymetrical Kite

C quad like kite

Plans for the NPW-5 NASA PARA WING, NPW9-b,NPW-HA and NPW-PHA.

Plans and photos of an inflatable sled design for kite surfing.