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27-05-2021, 06:19
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#1
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Registered User
Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 11,832
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How stable cats really are (video)
I think this video really shows how stable catamarans can be. There’s always chatter about how easily they can flip. How they’re not seaworthy or good in rough breaking waves. Take a look at this video.
https://www.instagram.com/p/CPYK_VRh...dium=copy_link
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27-05-2021, 06:49
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#2
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Senior Cruiser
Join Date: Jan 2010
Location: PORTUGAL
Posts: 30,616
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Re: How stable cats really are (video)
What I call a lucky escape.. I notice that after the first wave the Cat seemed unable to maneuver after that hit.. engines flooded..??? Rudders bent..??? she just drifted beam on to the seas in the bit I could see.. a mono would have coped without that amount of drama.
Love to hear the after story.. did it end up beached, did it have to be towed back in.???
__________________
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"I Love You.. ". Murray Roman.
Yet the 'useful idiots' still dance to the beat of the drums.
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27-05-2021, 07:10
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#3
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Registered User
Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 11,832
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Re: How stable cats really are (video)
Quote:
Originally Posted by boatman61
What I call a lucky escape.. I notice that after the first wave the Cat seemed unable to maneuver after that hit.. engines flooded..??? Rudders bent..??? she just drifted beam on to the seas in the bit I could see.. a mono would have coped without that amount of drama.
Love to hear the after story.. did it end up beached, did it have to be towed back in.???
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Yeah. I’m just talking about form stability. Not talking about ultimately how well the cat did in those waves and whether or not it could still motor out of there. Doesn’t look like it could.
But it stayed right side up. That’s all I’m getting at. And these conditions would have rolled any mono several times.
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27-05-2021, 07:22
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#4
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Registered User
Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 4,229
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Re: How stable cats really are (video)
More information (and some of the normal CF critique) in this thread.
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27-05-2021, 07:59
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#5
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Registered User
Join Date: Oct 2011
Boat: KH 49x, Custom
Posts: 1,760
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Re: How stable cats really are (video)
That's pretty cool!
Thanks for posting Chotu.
Cheers.
Paul.
__________________
If you can dream it; with grit, you can do it.
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27-05-2021, 08:03
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#6
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Registered User
Join Date: May 2014
Location: Whitby, Canada
Boat: Morgan Out Island 41
Posts: 2,265
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Re: How stable cats really are (video)
You need to create an account to see the video....
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27-05-2021, 08:30
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#7
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Registered User
Join Date: Jun 2019
Location: Germany, soon..Hawaii!
Boat: Looking now!
Posts: 104
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Re: How stable cats really are (video)
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27-05-2021, 09:51
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#8
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Registered User
Join Date: Jun 2011
Posts: 155
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Re: How stable cats really are (video)
A very instructive footage indeed ! 1 - You can clearly see that it is a bad idea to take a sea from the bows, when there is a risk to be pushed backwards and pitchpoling over the stern's. 2 - You can clearly see how safe a catamaran is taking even a braker from the side : the seaward hull gets a kick, but shortly after the leeward hull gets a counterkick. 3 - At open sea it is of course always best to take the seas from quarterback, avoiding the boat to surf.
Capt. Claus - ocean tramp from the eighties - São Paulo/Brasil
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27-05-2021, 10:20
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#9
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Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,514
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Re: How stable cats really are (video)
I imagine the rudders are gone shortly. Cant really play the video more than a few seconds for some reason.
Of course I'd like to see the sails up in strong wind with that wave from the side if there is a point to be proven.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
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27-05-2021, 10:33
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#10
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Registered User
Join Date: Oct 2010
Location: Avalon, NJ
Boat: Albin 40 double cabin Trawler
Posts: 1,886
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Re: How stable cats really are (video)
Quote:
Originally Posted by Chotu
Yeah. I’m just talking about form stability. Not talking about ultimately how well the cat did in those waves and whether or not it could still motor out of there. Doesn’t look like it could.
But it stayed right side up. That’s all I’m getting at. And these conditions would have rolled any mono several times.
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Not true about the mono.
My last big rescue in the USCG was hoisting the 2 people who got washed overboard from a monoi n even bigger surf (Tropical Storm Josephine 1996, Hens and Chickens shoal just south of the Delaware Bay Mouth).
It was knocked down to mast in the water, but never rolled, at least 20 times til the 2 crew were washed overboard and we picked them out.
The boat was found about 30 miles southeast the next day by a fishing boat, still motoring in circles. The only damage was a torn off center hatch and about 30 gallons sloshing in the bilge.
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27-05-2021, 10:56
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#11
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Registered User
Join Date: Oct 2019
Location: San Leon, Texas
Boat: Knysna 440 once I get my new dock and the canal gets dredged
Posts: 914
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Re: How stable cats really are (video)
Quote:
Originally Posted by Cheechako
I imagine the rudders are gone shortly. Cant really play the video more than a few seconds for some reason.
Of course I'd like to see the sails up in strong wind with that wave from the side if there is a point to be proven.
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Totally agree! With no sails you lose a lot of options whether you're on a cat or monohull. Tough to steer the boat when you have no means of propulsion.
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27-05-2021, 11:04
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#12
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Registered User
Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 11,832
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Re: How stable cats really are (video)
Looking at this video, it reminds me of why I made my boat the way I did. The rudders come up out of the water in situations like this. The dagger boards come out of the water also. So do the props and engines. So it just skates around on the water while you stay inside.
That was my main safety strategy for the perfect storm kind of situations where you are faced with breaking waves like these. I know this is at a breaking beach scenario, but at sea with breaking waves, there would be some similarity.
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27-05-2021, 11:09
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#13
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Registered User
Join Date: Sep 2019
Location: Falls Church, VA
Boat: Island Packet 31
Posts: 55
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Re: How stable cats really are (video)
I would not be at all surprised to learn that the helmsperson was knocked off their perch pretty early on. If that were the case, it's no wonder the boat seemed incapacitated.
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27-05-2021, 11:16
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#14
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Registered User
Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 11,832
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Re: How stable cats really are (video)
Quote:
Originally Posted by CDR Smith
I would not be at all surprised to learn that the helmsperson was knocked off their perch pretty early on. If that were the case, it's no wonder the boat seemed incapacitated.
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He was.
Check Mook1e’s link above for a little bit more information. That YouTube link has a lot more of the video and an explanation as well as interview with the crew.
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27-05-2021, 11:32
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#15
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Registered User
Join Date: Dec 2020
Posts: 750
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Re: How stable cats really are (video)
Nobody who actually knows what they are talking about thinks catamarans are "easily" flipped. That is a total straw-man argument.
They are amazingly stable--most of them anyway. The big safety issue is not that catamarans flip easily, they do not. That they CAN be flipped by poor sailing technique is, of course, true.
The issue some people have is that that they ARE very stable... after they flip. there is no recovering. Very high form stability is very much a two sided coin.
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