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#1
posted to rec.boats.cruising
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Hobby Horse?
What causes some sailboats to hobby horse? Long overhangs? Bow
design? Stern design? G |
#2
posted to rec.boats.cruising
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Hobby Horse?
Gordon wrote:
What causes some sailboats to hobby horse? Long overhangs? Bow design? Stern design? G Waves. -- Roger Long |
#3
posted to rec.boats.cruising
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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. |
#4
posted to rec.boats.cruising
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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 |
#5
posted to rec.boats.cruising
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Hobby Horse?
"Roger Long" wrote in news:EWBgh.38775$zB4.32537
@twister.nyroc.rr.com: Waves. -- Roger Long Don'tcha just love it when a marine architect goes off on this long technical explanation with all these drawings and huge mathematical models to depict why a hull behaves the way it does?.....(c; Larry For this we needed 8 years of university education??...hee hee |
#6
posted to rec.boats.cruising
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Hobby Horse?
Rich Hampel wrote in news:151220061439253714%RhmpL33
@nospam.net: Better to to store heavy weight near the center of rotation (in the middle of the boat). Its a phenomenon of rotational inertia. Yeah, but who can stand all that wife bitching every time she has to crawl over those big tool boxes on the main salon deck to get to the head? Larry Isn't she the reason they were stowed in the ends in the first place?...(c; |
#7
posted to rec.boats.cruising
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Hobby Horse?
What I really meant was: Insufficient damping combined with first or second
order correspondence of excitation cycle with natural pitching period. The significance of Radius of Gyration and rotational inertia may be greater in terms of resonant carry over of motion than gross value and counter intuitive results may be experienced when adjusting weight distribution. -- Roger Long |
#8
posted to rec.boats.cruising
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Hobby Horse?
If you can spout all this physics, why are you asking us?
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#9
posted to rec.boats.cruising
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Hobby Horse?
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#10
posted to rec.boats.cruising
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Hobby Horse?
"Roger Long" wrote in news:wrHgh.4913$nq5.3130
@twister.nyroc.rr.com: Asking what? Who... Wa... ? -- Roger Long I knew your "waves" answer was gonna cornfuze 'em....(c; Larry |
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