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Two Paw Construction Questions and Recommendations


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  #1 EdenRose

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Posted 08 September 2006 - 10:52 AM

I am looking at building a Two Paw.
I have a 5x10 sheet of 4mm Okoume left from an
earlier project.
If I intend on sheathing the outside with fiberglass, can
this boat be built with 4mm hull planks (thicker pieces
would be used for bulkheads and transoms)?
What would weight be?
AND... how has this boat been for folks as a rowing
boat and tender for yachts. I would tow the boat and
only break it down for storage on deck between trips.
EDENROSE

  #2 Garry

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Posted 08 September 2006 - 01:04 PM

I'm sure that the boat would be great for rowing and acceptable for towing. If you are going to tow it a lot, you might want to consider a Spindrift nester.

The pram style dinghy is an efficient design for rowing (non-planing) speeds. However, when towing, the short waterline will be trying to get up on plane.

The Spindrift is designed to plane a lot easier than the Two Paws resulting in less drag and less strain on the tow line. My 11 ft Spindrift nester has much less drag than my previous nesting pram (not a Two Paws but very similar).

  #3 EdenRose

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Posted 08 September 2006 - 04:10 PM

The Spindrift is designed to plane a lot easier than the Two Paws resulting in less drag and less strain on the tow line. My 11 ft Spindrift nester has much less drag than my previous nesting pram (not a Two Paws but very similar).


I currently tow a very heavy cedar planked Herreshoff Pram. It tows ok, but
the bow transom does stay out of the water. What makes the Spindrift plane easier, given the waterlines are about the same? Is it the V bottom?

  #4 Garry

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Posted 09 September 2006 - 04:32 AM

I'm no expert, but it's basicly the amount of fore and aft curve, rocker, in the bottom. The pram style has more rocker which is more efficient at slow (rowing) speeds but has more drag at higher (towing) speeds. The Spindrift has straighter lines and planes easier at towing speeds or with a small outboard or with a brisk breeze.

  #5 EdenRose

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Posted 09 September 2006 - 07:44 AM

I'm no expert, but it's basicly the amount of fore and aft curve, rocker, in the bottom. The pram style has more rocker which is more efficient at slow (rowing) speeds but has more drag at higher (towing) speeds. The Spindrift has straighter lines and planes easier at towing speeds or with a small outboard or with a brisk breeze.


Oh, those damn compromises in small boats :D
I guess I have to go with rowing efficiency as I won't be using
an outboard or sail. I should pick up some towing efficiency over
the inflatable I towed for six months on my trip to Alaska and back
or the current pram that weighs double what the Two Paw will weigh.

I think the narrow bowed Norwegian prams with lots of rocker
are the sexiest boats out there :wink:
Thanks for the input so far,
EdenRose

  #6 EdenRose

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Posted 09 September 2006 - 07:55 AM

[quote="EdenRose"][quote="Garry"]
(not a Two Paws but very similar).[/quote]

Garry,
Did you have the Danny Greene nesting pram?
If so, how would it compare? I certainly
think the fore-aft seat design used in the Two Paws
and other small boats light is a plus for balance.

  #7 Garry

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Posted 09 September 2006 - 05:00 PM

My previous pram was a Bruce Roberts design that I adapted to a nesting design. I did have a fore and aft seat in the bow also. Instead of a crossbeam seat in the stern, I had a drop-in piece that extended the fore and aft seat to the stern. I liked this better that the cross beam seat for balance.




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