Skippy, The Wing.Drive is the easy and safest way of using the wind as propulsion. No physical effort involved. No ropes, no winches no hard...
Sorry on Trawler Yachts and Fishing boats
Steve. I am agreeing with you to use the wind propulsion system on fishing boats. I think you will see a very big change in the fuel bill. The...
The Walker Wingsail system was a great idea. But it didn’t work the way John Walker expected. He make tree different wing sail system. One...
The R values was invented by Juan Baader His book.” Cruceros y Lanchas Veloces de Juan Baader.” In Spanish is one of the best books you can have....
Hej Eric If you work with Relativ speed instead of S/L Ratio it easy to understand. Relativ Speed = R = V/ SQR.Root L V = KM/H L = LWL...
About planning boats. Hull Speed = 1.34 * (LWL)1/2 LWL: length of the hull at the waterline. Planning starts at 2,9 -3.0 S/ LWL Ratio. All...
Common design: WING DRIVE and Walker WING SAIL are mounted on a central shaft permitting the rig to swing360 deg. A Tail orients the wing /s to...
Wing-Drive is a wind propulsion system. A safety simple sailing system for Catamarans. http://www.dahlberg-sa.com/kd/index.html
