Thread: Design
View Single Post
Old 12-06-2007, 12:16 PM   #10
Nomad Willy
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
RE: Design

I still disagree with you guys about fwd lift. See if this makes sense. When a boat reaches a speed length ratio of 1 the hull is riding right in the middle of the trough. The bow is on the backside of the bow wave and the stern is on the face of the stern wave. Both ends of the hull are equally supported and the boat moves forward in a level attitude ( neither bow up or down ). Now we try to go faster. The boat moves forward and in doing so assumes a position on the backside of the bow wave because the center of the boat is supported by the bow wave and the stern drops into the trough of the two waves. The stern droping and the center of the boat rising is what causes the bow to rise. The bow is just along for the ride.

Eric Henning
30'Willard
Thorne Bay AK
Nomad Willy is offline   Reply With Quote