Forums: Whisstock Designs: Which design for one? New Topic Post Reply
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Posted: Dec 9th, 2009 at 09:44   |   Subject: Which design for one?
I am desperately trying to decide which boat to build. Would like to start next year.

I would like to do some estuary sailing on the Tamar river here in Tasmania (really a 70k long, muddy estuary with a 2.5m tide which can get choppy near the mouth), on my own and for a few days at a time, which would you recommend?

I would have to launch her on my own, and have enough room to keep out of the weather when it turns wet and nasty for a day or two, and I would build the outboard well version.

The plans I have now are #077 (15'6" 2 berth yawl), 146 (18'6) 3 berth yawl) and 074 (19' 2 berth sloop). I like yawls but the neat arrangement of the 19 footer which hides the centreboard case in the cabin appeals to me too.

I have two girls and a son who would come out for a day sail, so the 18'6" separate toilet compartment is attractive, but then there is the large case in the centre of the cabin!

I assume the comfort of the two longer boats would be similar, and I am not a large person but 077 may feel a bit cramped.

Any thoughts on which would be the quickest to rig for a day sail? I assume they all would take under and hour to setup.
Posted: Dec 9th, 2009 at 17:37   |   Subject: Which Design?
This is a tough one!

Design 074 was designed as a day sailer, with a very basic camper accommodation. The design has developed over time and different builders, so that she now has an extended accommodation (sort of camper/basic live-aboard for two), a self-draining cockpit, internal ballast, and so on. All of which has made her more suitable for rather more extended cruising – but she is still essentially a day-sailer.

Both the other two have an external ballast keel plus additional internal ballast for tougher conditions.

Design 077 is a very small boat! After all there are lots of sailing dinghies at 15' and more. For her size she is very robust and capable, but nothing can defeat size and a larger boat is generally more capable that a smaller one. But for the conditions you describe, she should be pretty good. So, for this design, it just comes down to space. She really does have a camper accommodation, which would probably be just fine and cosy for you. Maybe a bit too small and uninteresting for your children if the day turns nasty.

Design 146 was designed with much more of a live-aboard accommodation for two or three. And for a more extensive cruising range than either of the other two. I'm not sure that the centrecase is that much of a consideration you know – it is only 300mm above the sole, and it is very simple to pop a removable seat on the top of it, to sit at the galley for example. She would be the most complicated of the three to build as well – which might be a consideration.

As far as towing, launching and recovery, I wouldn't think there is so much difference. Probably the two yawls take a little longer to set up, and there are more bits and pieces to get sorted, whereas the sloop is very simple - but all should be within the hour. 077 is the lightest and smallest to tow of course; the other two would be very similar to each other in that respect.

I don't know if any of this is helpful! And of course I don't know the ages of your children. If you were thinking they would only ever come day sailing with you, then 074 seems the best bet. If they might in time want to come on longer trips, or you want to encourage that thought, then 146 seems a better bet.


Posted: Dec 9th, 2009 at 18:16   |   Subject: Which Design?
I need to clarify the towing weights a little:

They are not the same as the displacement figures quoted on the site - which give the displacement on the dwl. This is the point we start from when designing the boat. It is not necessarily the final weight and nor does the boat finally float on the dwl! I will be adding an info pop-up to clarify this because it does cause some amount of confusion.

To get back to the towing weights .....

The calculated weight of 074, including rig etc, outboard and 200kg of internal ballast is 620kg. Provided there is not much gear stowed aboard, her towing weight should be around this figure.

The calculated weight of 146, including the outboard, but not the 100kg of optional extra internal ballast is 717kg, and again this would be the approximate towing weight (though there is more room to add personal gear in this boat).

In working trim, with crew and gear, we reckon that 146 should float about 40mm deeper and floating at this depth, she should displace about 1000kg.

So 146 is a heavier tow by at least 100kg.

Posted: Dec 10th, 2009 at 10:03   |   Subject: Compromise
Sounds like design 074 would do nicely. As someone once said, most boats are only used for daysailing and as an occasional weekender.

Cruising around our island would demand an entirely different craft anyway, so not an issue for me now.

Your designs do look like "real" boats too which adds to their appeal. Not that I am against "square boats" (I love the Bolger Micro), but, well, you know what I mean!

Thanks for the advice.