Grainger rocket factory raw 30 tri

Sailabout

Sailabout

Super Anarchist
3,859
207
Here there and everywhere
NUDDY said:
Sailabout said:
I have raced both and horses for courses, light air USA areas its what they all race, heavier yes use bigger floats

If you want arma's that you cant bury buy a cat
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Or a good tri. SeaCart 30 has catamaran hulls for floats. Production F22 also has floats you can sail on.

My buddy in SA has flipped his Seacart and they were not pushing it any more than normal.
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paulnudd

paulnudd

Super Anarchist
1,745
3
Wangi
Sailabout said:
The gist I hear from designers is if you can fly the main hull, you can flip it.

Ok for racers but not for weekend warriors.
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Funny about that. If you can fly the main hull you can flip it. If you can't fly the main hull you can flip it. Quite easy to do in either case. Actually IMO easier and more likely to flip a tri with low buoyancy floats (if you are sailing hard, ie racing - go hard or go home).

 
ianlf

ianlf

Anarchist
802
1
New Zealand
NUDDY said:
Sailabout said:
The gist I hear from designers is if you can fly the main hull, you can flip it.

Ok for racers but not for weekend warriors.
Click to expand...
Funny about that. If you can fly the main hull you can flip it. If you can't fly the main hull you can flip it. Quite easy to do in either case. Actually IMO easier and more likely to flip a tri with low buoyancy floats (if you are sailing hard, ie racing - go hard or go home).
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It's certainly not easy to capsize in my experience , and it is something I have never managed to do after many years of hard racing. It is also not so much the size of the floats that cause capsizes, it is more the size of the rig and the nut behind the wheel.

I have actually found low buoyancy (submersible) floats the hardest of all to capsize, being much more forgiving. They were first promoted by Lock Crowther (Kraken 33) in the old days in Australia where trimarans had a bad name for capsizing, with mostly full buoyancy floats, that were being promoted by a few as ocean going and even capsize proof! Were becoming impossible to insure, so something had to be done. The idea was to go with wider beam and submersible floats, the wide beam giving more stability, but at the limit the floats would submerge, and allow the boat to heel over (just like a mono) and recover, as the wind is spilled.

Seemed like a good idea, so I went with these on the Trailertri series, which still today has the best capsize record of any of my designs.They give plenty of warning when boat is being pressed too hard, plus could even take a complete knockdown and still recover. In one instance, a 19' Tramp was being driven hard by a skiff crew with an 18' skiff masthead kite (they were timed at 23 knots with this up), but then overcooked it. Monohull behind reported masthead being just a couple of feet off the water. The crew thought it was gone, and jumped overboard, but skipper lunged for kite halyard, let it go, and boat righted itself. Had it had full buoyancy floats it would have been bath time

I have had many similar cases reported over the years where skipper has ended up walking on the cockpit side, but boat still righted itself.

Now some 'experts' like to say that submerging a float is disastrous, as boat will spin out downwind, or trip over it and capsize. But not true with well rounded submersible floats. I've been on a Tramp many times with the float 1' underwater in long bursts, and the only thing it wants to do is round up slightly. Very safe and forgiving, and such floats re-established the insurability of small trimarans in Australia with Trailertris proving to be a very good insurance risk over many years. They in fact helped open the gates for the more extreme racers to come along later, but who are now generating insurance problems for others.

TT720CloseReach.jpg ​
A Trailetri 720 with submersible floats. Very safe and forgiving, and if one ignored the​
warning signals that it was time to reef, it could still save your bacon by self righting.​

The main downside of submersible floats is that they are slower, for as the boat heels more there will be more drag and fuss. Full buoyancy floats at the same wide overall beam will be faster, which is why I changed over many years ago, but the boat will be more prone to 'kite' and perhaps capsize. The key in this case is to keep the rig small so that the boat is not overpowered, and not just an accident going somewhere to happen.

Ian Farrier

Farrier Marine

Designs that Work

 
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O

offtherails

Member
270
6
Sydney
C'mon guys, there has been zero about the thread topic for post after post after post. ( ad nauseum)

SA writers ought to be better than the twitterati

lift the game!

 
H

huey 2

Super Anarchist
4,118
2,226
syd
Spi Ouest. First race 3rd Place


Sunshine, an easterly flow of 7 to 10 knots, a strong ebb tide, the conditions were met this Friday for the first day of the Spi Ouest-France Banque Populaire Grand Ouest to be a success on each of the five rounds. anchored in Quiberon Bay.



Group Multi 2000 (MUL) after 1 race​

1: “Evinrude”, Paul Chiron ((Dragonfly 28p / CN de Pornic) 1 points

2: "Grace O'malley", Philippe Nicolas (Dragon Fly 32s / CN de Pornic) 2 points

3: “Storm”, Frederic Rialland (Airplay 30 / Ass Club Nautique Hoedicais) 3 points

4: “Tribu”, Denis Henrion ((Dragonfly 28s / Societe Nautique de la Trinite S/mer) 4 points

5: “France”, Vincent Jacquot ((Dragongly 35u / ) 5 points

6: "Mikad'eau", Emeric Dubar (Trimaran / Ste Naut. de Locmariaquer) 6 points

7: “Spirit Of Exstasy”, Yvan Noblet ((Trimaran / CN de Belon) 7 points

8: “Dragon Time”, Francois-Xavier Drogou ( (Dragonfly 28s / ) 8 points

9: “3 Bouts”, Herve Drogou ((Tricat 30 P / Center Nautique de Lorient) 9 points

10: “Fulmar”, Andre Benard (Dragon Fly 35 / YC de la Mer du Nord) 10 points

11: “Red Avel”, Philippe Damour (Dragonfly 920th / Societe Nautique de la Trinite S/mer) 11 points

12: “Half Moon 4”, Charles Pecher ( (Corsair 880s / Belgium) 12 points

13: "Akila", Eric Lavasier (Farrier F9r / Valle des Fous Club) 13 points

14: “Glomerude”, Eric Gauthier ((Tricat 30 / ) 14 points

15: "Tripote", Vincent le Manchec (Dragonfly 920th / Societe Nautique de la Trinite S/mer) 15 points

16: “Krabanou”, Philippe Laperche (Trimaran / YC de Carnac) 16 points

17: “Salgos”, Nicolas Berndt ((Ts3 / Cercle de la Voile du Centre) 17 points

18: "My Way", Ronan Guerin ((Multi / APCC Nantes) 18 points

19: "Avanza", Pierre Van Den Broek ((Seacart 30 / Valle des Fous Club) 19 points
 
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