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Old 03-03-2016, 22:38   #46
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Re: Catamaran surfs into rocks

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Originally Posted by Dogfish View Post
This guy got it right in much bigger surf.



I remember this from my beach cat sailing days: Ride it straight!
this guy used motors to straighten boat after start going port. Probably studied well many scenarios prior.

the other cat had much better conditions and maybe turn on starboard motor only as conditions looked benign. There was plenty of time to engage port one and wave was much smaller than successful crossing one.

experience does not necessary sharpen someones reactions. Often opposite as ego grows too much.
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Old 03-03-2016, 23:05   #47
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Re: Catamaran surfs into rocks

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this guy used motors to straighten boat after start going port. Probably studied well many scenarios prior.

the other cat had much better conditions and maybe turn on starboard motor only as conditions looked benign. There was plenty of time to engage port one and wave was much smaller than successful crossing one.

experience does not necessary sharpen someones reactions. Often opposite as ego grows too much.
I don't think this guy at Southport studied to many scenarios prior.Well maybe he did but in my opinion the best scenario would have been to continue North and come into Brisbane.
Maybe he is very experienced maybe not possibly used some engine maybe not but I reckon very simple pure unadulterated arse got him through.
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Old 03-03-2016, 23:36   #48
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Re: Catamaran surfs into rocks

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I don't think this guy at Southport studied to many scenarios prior.Well maybe he did but in my opinion the best scenario would have been to continue North and come into Brisbane.
Maybe he is very experienced maybe not possibly used some engine maybe not but I reckon very simple pure unadulterated arse got him through.
look at second 46. No rudder could straighten boat like this.
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Old 04-03-2016, 02:26   #49
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Re: Catamaran surfs into rocks

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look at second 46. No rudder could straighten boat like this.
I am not going to get far into this as I am not educationally equipped to know but I would think that boat was already exceeding a speed that would allow the props at even full noise to make that much of a turn.
Pure luck!
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Old 04-03-2016, 03:04   #50
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pirate Re: catamaran surfs into rocks

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I don't think so. Surfboards don't have daggerboard or keels.
True.. they use edges
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Old 04-03-2016, 03:24   #51
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Re: Catamaran surfs into rocks

in my youf, i did a bit of local rally car driving amateur class. There are certain things you learn to do.
One rally circuit i went to, they has a local vicar offer a blessing. I asked why.

I was told.

" No matter how good you are, how experienced, you are still human. This is to ensure that we remember that sometimes we are helpless in the real world of nature and rely on unseen help."
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Old 04-03-2016, 03:33   #52
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pirate Re: Catamaran surfs into rocks

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in my youf, i did a bit of local rally car driving amateur class. There are certain things you learn to do.
One rally circuit i went to, they has a local vicar offer a blessing. I asked why.

I was told.

" No matter how good you are, how experienced, you are still human. This is to ensure that we remember that sometimes we are helpless in the real world of nature and rely on unseen help."
Patience my friend.. Google is almost there..
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Old 04-03-2016, 04:00   #53
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Re: Catamaran surfs into rocks

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Patience my friend.. Google is almost there..
that made me larf....
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Old 04-03-2016, 05:29   #54
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Re: Catamaran surfs into rocks

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Sounds like Peniche... friend of mine was a semi-pro Jogodor for Peniche then blew a knee and switched to surfing.. he's got a cottage on the beach.. he's currently laid up with a broken ankle.. I keep telling him to stick to his Wauquiez..
Yes, Peniche county but not Peniche, Baleal, one of the nicest spots in Portugal.

I still have a house on the Island but now the place is so crowded (for my taste) that I just rent the house and go cruising
Nice people dough, from all the world but mainly from all Europe.
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Old 04-03-2016, 06:59   #55
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Nice.. my mate Emanuel is across the Bay.. Peniche side
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Old 04-03-2016, 12:40   #56
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Re: catamaran surfs into rocks

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I don't think so. Surfboards don't have daggerboard or keels.
That is not correct. Although they do not have what is termed a "dagger board or keel"most have fins which do the same thing- give the craft directional stability,
keeping the "stern" the following the "bow". The majority have at least three, or more.

Rolf Arness won the 1970 world championship using low area fins so you could weight forward & torque your body simultaneously & do 360's. also as someone mentioned using the aerated water for less "directional stability", allowing the back to become the front. Principles, of course, are similar.

The fins are fixed of course & are positioned approx where a rudder would normally be.
In my business I manufactured some 3000 custom surfboards & coached a successful competitive surf team, before the solvent/dust got to me.
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Old 04-03-2016, 12:52   #57
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Re: Catamaran surfs into rocks

I may have mis-interpretted what was inferred by no keels or dagger boards.
You are right in terms of where the center of lateral resistance would be of
a keel or dagger board. More amidships.
That doesn't help overcome the the force require to break the track once a SB is on "rail".
As boatman stated.
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Old 04-03-2016, 14:07   #58
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Re: catamaran surfs into rocks

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That is not correct. Although they do not have what is termed a "dagger board or keel"most have fins which do the same thing- give the craft directional stability,
keeping the "stern" the following the "bow". The majority have at least three, or more.


The fins are fixed of course & are positioned approx where a rudder would normally be.
What a strange post! You say I'm wrong, in that surfboards don't have daggers or keels, then go on to say surfboard don't have daggers or keels!

Yes they have fins, I think everyone knows that, and as you say, they are positioned well aft - more like rudders. Not at all like daggerboards or keels.

My point was, I don't think adding more drag and/or grip at the middle of the boat's hull would have helped them to turn the bow down the wave. IMO it would be more likely to have hindered this than help.
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Old 04-03-2016, 14:26   #59
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Re: Catamaran surfs into rocks

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Originally Posted by arsenelupiga View Post
this guy used motors to straighten boat after start going port. Probably studied well many scenarios prior.

the other cat had much better conditions and maybe turn on starboard motor only as conditions looked benign. There was plenty of time to engage port one and wave was much smaller than successful crossing one.

experience does not necessary sharpen someones reactions. Often opposite as ego grows too much.
The report said that he had one engine out. Did that contributed to the turning moment? It may have. He would have been applying considerable starboard helm just to stay straight. When the rudders ventilated the off-center thrust cause a fast left turn from which there was no possible recovery, not when you consider full throttle on the starboard side. I bet that really caught him by surprise. Since none of us mentioned that factor, I bet he didn't think of it!


Perhaps a lesson is that a cat with one engine has a peculiar problem. They are great for maneuvering when they both work, but most cat sailors will tell you that close maneuvering with one engine is a nightmare (they just go in circles--I know).

A drogue on starboard corner might have worked. No torque, restraining force.
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Old 04-03-2016, 14:38   #60
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Re: Catamaran surfs into rocks

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look at second 46. No rudder could straighten boat like this.
??? I disagree. At the speed the boat is going by then, the rudders would have plenty of power.

The guy got through with a mixture of skill and luck. He almost got it wrong, almost was turned side-on. He had it just close enough to square on to the wave that when the rudders bit, they were able to straighten it.

I reckon for a couple of seconds there, he'd have had some serious "pucker" going on...
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