roblpm
Well-known member
I was nearly going bonkers...... ?
New lock down. Comparing boats. Using sailboat data filters.
However it appears wl length is used in the displ/length calculation which makes it impossible to compare old and new boats.
The newer boats have a waterline length nearly the same as LOA.
Now I can understand when heeled an old boat's wl length will increase. However when I am looking at the displacement to see how much the boat is going to bounce up and down I don't understand this approach.
Example:
Nicholson 39 (1975) LOA 11.89m Displacement 8165kg Disp/len 353
Elan Impression 394 (2012) LOA 11.9m Displacement 8000kg Disp/len 222
Seems completely bonkers to me or am I just wrong? When I am bobbing about in the middle of the ocean are these two boats gonna Bob up and down completely differently? (BTW I'm not too interested in the keel, rudder debates. Well actually I am but maybe we can ignore them on this thread! ?)
New lock down. Comparing boats. Using sailboat data filters.
However it appears wl length is used in the displ/length calculation which makes it impossible to compare old and new boats.
The newer boats have a waterline length nearly the same as LOA.
Now I can understand when heeled an old boat's wl length will increase. However when I am looking at the displacement to see how much the boat is going to bounce up and down I don't understand this approach.
Example:
Nicholson 39 (1975) LOA 11.89m Displacement 8165kg Disp/len 353
Elan Impression 394 (2012) LOA 11.9m Displacement 8000kg Disp/len 222
Seems completely bonkers to me or am I just wrong? When I am bobbing about in the middle of the ocean are these two boats gonna Bob up and down completely differently? (BTW I'm not too interested in the keel, rudder debates. Well actually I am but maybe we can ignore them on this thread! ?)