Is Power superior to sail

[idpnd]

Note that the lifeboat, in difference to your average mobo, actually has a keel for self-righting momentum..

All sailboats (of recent decades) are CE certified to recover from a complete knock-down.

A lot of of the plastic floating beachfront condos are actually top-heavy and thus tip-happy!

 

[John100156]

I did 80nm in a F5, predicted F2, on my stbd bow crossing from Majorca to Sant Carles in Oct-08 in my Targa 34, it was hard work.

Forced to throttle back almost into semi-displacement mode, but I did feel safe and in control. The boat manouvered well and I was able, in most cases, to turn the bow into the waves but with frequent punches on the nose.

SO, what did I learn from this: Probably should have turned back, I was only 20nm out from Soller when the wind and sea kicked-up, I could have easily made it back in 45 mins taking the waves on my port quarter!

I would not like to meet the conditions shown in the video in my T34, would prefer rag and stick, but one thing you can do with a Mobo if you get enough notice, is to get back from whence you came quickly!

 

[sarabande]

idpnd -

sorry but the RNLI boats do not rely on a keel for their self-righting recovery. They have a combination of hull shape, and contained air space which acts as a float, to lever the hull back from an inverted position until such time as the inherent buoyancy and CofG collaborate to bring the craft back fully upright.

On the bigger inflatables, there's a bag on top of the frame which inflates on inversion to perform a similar function.

RNLI and USCG have shared many design features to produce their current range of boats.

Pics here
http://www.44mlb.com/self-righting.htm

 

[AndieMac]

Note that the lifeboat, in difference to your average mobo, actually has a keel for self-righting momentum..

All sailboats (of recent decades) are CE certified to recover from a complete knock-down.

A lot of of the plastic floating beachfront condos are actually top-heavy and thus tip-happy!

Its very important a yacht recovers quickly from a heeled position (90 deg. to perpendicular), because they are designed to travel that way from wind directions of 180 degrees.

They may indeed recover from a complete roll over as well, but it ususally means the loss of the mast/s, and half submerged from water ingress through the companion-way during a prolonged inversion, with no electrics or mechanical.
Lets face it, in the conditions that would roll the boat over (e.g. Sydney to Hobart race - 1998) you are only waiting to be rolled again.

Where was that life raft again?

 

[idpnd]

sorry but the RNLI boats do not rely on a keel for their self-righting recovery. They have a combination of hull shape, and contained air space which acts as a float, to lever the hull back from an inverted position until such time as the inherent buoyancy and CofG collaborate to bring the craft back fully upright.

"Another aspect aiding in its confined manoeuvrability would be the bilge keels which aid in protecting its twin drive props." http://en.wikipedia.org/wiki/Trent_class_lifeboat

They're all going to have some weight in the bottom..

 

[oceanfroggie]

The videos do not compare like for like. The sail vessel is in far worse conditions.

Generally speaking the motion of a sail vessel with some cloth up will be a lot less vigourous than a motor vessel which will get tossed around much more.

 

[Divemaster1]

I think we all have to be a bit more objective in this discussion:

1) are the conditions similar ?
2) do we have full control (sail and power)?
3) are WLL (Water Line Length) comparable
4) are we designed as cruisers (mainstream leisure) or as CAT A ? (Elling, Linsen, Halberg Rassey, Sparkman & Stephens, Nelson, Bavaria, Sealine, Sunseeker, AZ, Hardy etc.).

...or are we talking about "our" selection ?

Now...our MOBO is listed as CAT A (and maintained as such) ... but not mainstream... comes with some quirks and does not have the accommodation of a "new 45ft", but so far she's not disappointed me in respect to seakeeping..... and at times we, and fishing vessels have been the only ones out there returning to port.... with family feeling safe.