From: Rob Denney <harryproa@gmail.com>
To: harryproa@yahoogroups.com.au
Sent: Mon, August 23, 2010 7:05:50 AM
Subject: Re: [harryproa] Pseudo harryproa Titao in Barcelona
No. The mast was pretty bendy, the bow/back stays would tighten before it would break in a normal caught aback situation. No idea if the same thing will work for your rig. Doesn't really matter. The sooner you break the Hobie mast and jib, the sooner you can put a proper rig on it. ;-)
Rob,I've been fretting about my stays. I'll have the main one for heeling forces and two to the bows, but I'm relying on the just the bending in the bearings for getting aback. I'll add the doubler... but did you have any other means of resisting the aback case?Thanks,Dennis
From: Rob Denney <harryproa@gmail.com> Sent: Sun, August 22, 2010 9:42:00 PM
Subject: Re: [harryproa] Pseudo harryproa Titao in Barcelona
An extra piece of stiffening, usually a close fitting tube. Inside is neater, heavier but harder to install.
robOn Mon, Aug 23, 2010 at 6:52 AM, Antonio Tutusaus <atutusaus@telefonica.net> wrote:
Rob:
What do you mean by doubler?
An internal nerve or a double skin on the outside of the mast?
Toni
barcelona
De: harryproa@yahoogroups.com.au [mailto:harryproa@yahoogroups.com.au] En nombre de Rob Denney
Asunto: Re: [harryproa] Pseudo harryproa Titao in Barcelona
Enviado el: viernes, 20 de agosto de 2010 6:47
Welcome back, Antonio. On Elementarry, (7.5m long) the rudders (NACA 0012) are 1.3m either side of the mast and only the aft one is used, except in light air.
My stayed alloy rig eventually broke when I capsized violently and sheared it at the deck bearing, so add a doubler at that point, and carry it up past the boom.
robOn Thu, Aug 19, 2010 at 6:10 AM, Antonio Tutusaus <atutusaus@telefonica.net> wrote:
Hello everybody:
This summer sailing has brought me one step closer to building my planned harryproa mini cruiser/weekender.
My brother in law rented a Beneteau (10m. monohull) for a week. It was nice, but all we managed to achieve were peaks of 8 knots running in a very strong wind. Most of the time we had trouble keeping 6 knots in full sail.
Also, the angle to windward was never smaller than 50 degrees. And in the rocky coast north of Barcelona he was psychotic about hitting a rock with our 1.8m draft. So we missed many of the best bathing sites.
So I will probably build a harryproa in the next two years. BUT, first I will convert my pacific proa TITAO into an almost harryproa:
1) Add rudders
2) Add aerorig
3) Add engine
The key element of a harryproa that I won't incorporate for the time being is the all weight to windward since my ama is not buoyant enough.
The first step is rudders. I plan to build two rudders attached to windward side of lee hull. They will be symmetrical fore aft and asymmetrical lee-wind (almost flat to lee). They will be linked by rigid bars and have a single steering wheel, rod, rope..(don't know yet). They will therefore be in opposite sinc.
What I have really no clue about is positioning (distance from center) and size of the rudders.
TITAO basic data:
Mainhull length: 6.7 m
Mainhull width: 0.44m
Mainhull height: 0.9m
Mainhull asymmetrical lee-wind. Slight rocker, flat deck
Overall width: 2.56m
Distance between akas: 2.42m
Ama is V shaped with slight rocker.
The aerorig is yet to be built. I have no ideas as to sail type or area. TITAO has always sailed with a batten less, boomless, triangular sail of 11sqm.
I appreciate any ideas, considerations, advice or criticism.
Toni Tutusaus
Barcelona