Subject: [harryproa] controlled self capsizing for cruiser
From: "lucjdekeyser@telenet.be [harryproa]"
Date: 11/16/2014, 10:10 AM
To: <harryproa@yahoogroups.com.au>
Reply-to:
harryproa@yahoogroups.com.au

 

Capsizing remains a point of contention against multihulls, valid or not. Particularly for cruisers capsizing is rated as pretty catastrophic. The Bucket List (not a cruiser) proposes a feature to prevent and another one to recover from capsizing.


On another tack, the main disadvantage of wingmasts is that they may not be responsive enough to deal with heavy wind gusts and shears and be high drag and high lift despite being very low drag feathered in more laminar flow conditions. 


I was wondering how feasible a sort of self capsizing maneuver would be to ride out inevitable storms? A harry proa is particularly suited for a scheme whereby only the leehull would be "capsized" together with the mast(s) by rotating it at the inner fixation point with the beams. It would be much like the BL maneuver to install and de-install the mast on the hard but where the beams are already or remain half attached to the lee hull. The side of the hull could even feature a half circular cradle to accept each beam in that position and with the corresponding screw holes appropriately placed the hull would be fully attached to the beams. 


I do not know if it would be advisable to even use the sail as a drogue but in extreme conditions anything goes, I guess.


Turning the lee hull the other way around, instead, would allow the mast to rest on the cabin, where if attached in its cradle becomes an additional triangulated structural feature for weathering the storm. The remaining angle of the cradle on the side of the lee hull is less obvious though.

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Posted by: lucjdekeyser@telenet.be
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