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Polar Diagrams for beach catamarans?
by Frank N. 05/04/22 07:38 PM
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Pitchpole? #149871
07/18/08 09:27 PM
07/18/08 09:27 PM
Joined: Sep 2007
Posts: 224
Cincinnati, Ohio
Tri_X_Troll Offline OP
enthusiast
Tri_X_Troll  Offline OP
enthusiast

Joined: Sep 2007
Posts: 224
Cincinnati, Ohio
Ouch. Did it for the first time today. Ended up with some nasty rope burn and had to friendly couple in a canoe help me right it.

What I am wondering, though I'm sure I've read it somewhere, is it safe to assume that cats are most prone to pitchpole when sailing on a beam reach or a close reach?

It was blowing about 15kts and I was aft on the trampoline, sailing somewhere between a beam reach and a close reach. Wasn't even flying a hull and the stb hull burried and over I went.

I found my boat was much more prone to stuff a bow than it was to fly a hull. I was able to fly a hull when sailing close hauled, upwind, but just barely and even then it was wanting to burry a hull. Is this normal, or am I doing something wrong and trying to sail it like a monohull?


Any pointers?

Last edited by Tri_X_Troll; 07/18/08 09:49 PM.

Ryan - H16 I prefer to go sailing because baseball, football, tennis, and golf only require 1 ball!
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Re: Pitchpole? Possible rigging issues? [Re: Tri_X_Troll] #149872
07/18/08 09:49 PM
07/18/08 09:49 PM
Joined: Sep 2006
Posts: 168
San Diego
H
hokie Offline
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hokie  Offline
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Posts: 168
San Diego
If your mast is raked too far forward you may be more prone to pitchpole.



Re: Pitchpole? [Re: Tri_X_Troll] #149873
07/19/08 01:10 AM
07/19/08 01:10 AM
Joined: Sep 2007
Posts: 571
Hamburg
Smiths_Cat Offline
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Smiths_Cat  Offline
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Hamburg
Hi,

It is normal, that you will not be able to pitchpole, if you are close hauled. Most dangerous courses are between beam and broad reach. In general the more aft and the stronger the apparent wind is, the higher the chance to pitch pole.

Cheers,

Klaus

Re: Pitchpole? [Re: Smiths_Cat] #149874
07/19/08 08:44 PM
07/19/08 08:44 PM
Joined: Sep 2007
Posts: 757
japan
erice Offline
old hand
erice  Offline
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Joined: Sep 2007
Posts: 757
japan
all cats will do it if pushed hard enough

some cats are more prone to it than others

basically it depends on how much hull volume there is forward of the main beam

hobie 16's are 1 of the most likely to pitchpole due to their small hull volume forward of the main beam

search youtube for pitchpole


eric e
1982 nacra 5.2 - 2158
2009 weta tri - 294
Re: Pitchpole? [Re: erice] #149875
07/19/08 11:16 PM
07/19/08 11:16 PM
Joined: May 2004
Posts: 61
davidtugwell Offline
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davidtugwell  Offline
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Joined: May 2004
Posts: 61
IMO the Hobie 16 is so much fun because of its tendancy to pitchpole. It is an overpowered boat with not too much hull volume giving it a very twitchy personality, which includdes pitchpoline. A recipe for exciting sailing.

You do not have to pitchpole but to sail a 16 hard it needs constant helm control. Of all the cats I have owned and sailed I have found the 16 the most exciting because it has to be sailed. Pitchpoling is fun!!

Re: Pitchpole? Possible rigging issues? [Re: hokie] #149876
07/19/08 11:47 PM
07/19/08 11:47 PM
Joined: Jun 2004
Posts: 1,479
Thailand
Buccaneer Offline
veteran
Buccaneer  Offline
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Joined: Jun 2004
Posts: 1,479
Thailand
All of the above but first try adjusting mast rake back two holes. cool:


"House prices have risen by nearly 25 percent over the past two years. Although speculative activity has increased in some areas, at a national level these price increases largely reflect strong economic fundamentals." Ben Bernanke 2005
Re: Pitchpole? [Re: Tri_X_Troll] #149877
07/20/08 06:54 AM
07/20/08 06:54 AM
Joined: Feb 2006
Posts: 3,348
F
fin. Offline
Carpal Tunnel
fin.  Offline
Carpal Tunnel
F

Joined: Feb 2006
Posts: 3,348
It's part of the game. Learn to anticipate and bear away.

Re: Pitchpole? [Re: fin.] #149878
07/20/08 01:42 PM
07/20/08 01:42 PM
Joined: Jul 2006
Posts: 549
Knokke-Heist - Belgium
Gilo Offline
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Gilo  Offline
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Knokke-Heist - Belgium
Don't loosen the jib too much and only ease the traveller, don't ease the main.

An eased jib and main will push the nose down.

Gill


Falcon F16 - BEL666
Boats: TheBoatShop.be
Stories: bladef16.blogspot.com
Re: Pitchpole? [Re: Gilo] #149879
07/20/08 02:37 PM
07/20/08 02:37 PM
Joined: Sep 2007
Posts: 571
Hamburg
Smiths_Cat Offline
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Smiths_Cat  Offline
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Hamburg
Quote
An eased jib and main will push the nose down

?
On my Dart 18, easing the jib, was efficent to avoid a pitchpole. On H16 and other non spi boats, you cannot drop the traveller because it is max out on a broad reach... at least I think that is the way I sailed my Dart.

Cheers,

Klaus

Re: Pitchpole? [Re: Smiths_Cat] #149880
07/20/08 03:05 PM
07/20/08 03:05 PM
Joined: Sep 2007
Posts: 531
Lake Murray SC
FasterDamnit Offline
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FasterDamnit  Offline
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Lake Murray SC
Quote
Quote
An eased jib and main will push the nose down

?
On my Dart 18, easing the jib, was efficent to avoid a pitchpole. On H16 and other non spi boats, you cannot drop the traveller because it is max out on a broad reach... at least I think that is the way I sailed my Dart.

Cheers,

Klaus


As a long time H16 crew in my youth when we still had reaching legs, popping the jib allowed the bow to come up without loosing too much velocity. If I could keep the leeward bow flirtin' w/ disaster better then the next boat, we made time and occasionally a boat.


Race cheap, race faster, Damnit!

E-Scow
24' ULDB

18HT hulls plus Gcat 5.7 rig = 18GT!

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