Hobby Horse?
 

What causes some sailboats to hobby horse? Long overhangs? Bow
design? Stern design?
G

Hobby Horse?
 

Gordon wrote:
What causes some sailboats to hobby horse? Long overhangs? Bow
design? Stern design?
G

Waves.

--
Roger Long

Hobby Horse?
 

Gordon wrote:
What causes some sailboats to hobby horse? Long overhangs? Bow design?
Stern design?
G

I'll start ...

Its a complicated question. For instance, long overhangs reduce
hobby-horsing because they add reserve buoyancy, but they increase it
because of added mass in the extremities.

One design feature that hurts is too much symmetry fore and aft. In
this case there is little change in buoyancy as the boat pitches.

If you have a boat that pitches too much, you can try reducing the
weight in the bow. This is why catamaran owners will avoid heavy
ground tackle, etc.

Hobby Horse?
 

Mostly caused by overloading the bow and stern with excess weight.
Better to to store heavy weight near the center of rotation (in the
middle of the boat). Its a phenomenon of rotational inertia.


In article , Gordon
wrote:

What causes some sailboats to hobby horse? Long overhangs? Bow
design? Stern design?
G

Hobby Horse?
 

"Roger Long" wrote in news:EWBgh.38775$zB4.32537
@twister.nyroc.rr.com:

Waves.

--
Roger Long



Don'tcha just love it when a marine architect goes off on this long
technical explanation with all these drawings and huge mathematical models
to depict why a hull behaves the way it does?.....(c;


Larry

For this we needed 8 years of university education??...hee hee

Hobby Horse?
 

Rich Hampel wrote in news:151220061439253714%RhmpL33
@nospam.net:

Better to to store heavy weight near the center of rotation (in the
middle of the boat). Its a phenomenon of rotational inertia.



Yeah, but who can stand all that wife bitching every time she has to crawl
over those big tool boxes on the main salon deck to get to the head?

Larry

Isn't she the reason they were stowed in the ends in the first place?...(c;

Hobby Horse?
 

What I really meant was: Insufficient damping combined with first or second
order correspondence of excitation cycle with natural pitching period. The
significance of Radius of Gyration and rotational inertia may be greater in
terms of resonant carry over of motion than gross value and counter
intuitive results may be experienced when adjusting weight distribution.

--
Roger Long

Hobby Horse?
 

If you can spout all this physics, why are you asking us?

Hobby Horse?
 

Hobby Horse?
 

"Roger Long" wrote in news:wrHgh.4913$nq5.3130
@twister.nyroc.rr.com:

Asking what? Who... Wa...
?

--
Roger Long



I knew your "waves" answer was gonna cornfuze 'em....(c;

Larry