Monday, December 28, 2009

What I've been doing lately



What do you do with a bargain basement priced 35 year old Tornado sailing catamaran when its sailing days are past? I had a couple of choices. I could restore and reinforce the hulls, buy new sails and rigging, and sail it like the designer intended, but somehow I could not see myself righting that 27' rig after a capsize. I could have used the two hulls as amas and built a longer center hull to make a small cruising trimaran. This has been successfully done by others.
Or I could make it into an outboard powered fishing and day cruising boat. The last choice seemed the easiest because not only do I already have a yard full of sailing canoes but I had a 9.9 hp Honda outboard and was interested to see how fast I could drive these hulls.



I tried to keep everything as light as possible while still spending the minimum amount of money. There are four hollow plywood girders bridging between the two original aluminum crossbeams. The deck is 9mm (3/8") Meranti ply. The sides and seats are all 6mm (1/4") ply.
I had to do some test runs to get the motor height just right. You can lose a lot of speed if the prop is too deep and it will ventilate if it is too shallow.
My GPS read a maximum speed of 13.8 knots (25.5 km/h).
Future work will involve reducing the spray from the engine that hits the aft crossbeam and possibly fitting a dodger/awning for sun and wind protection.
And in true outrigger style, the entire platform is lashed to the crossbeams with polyester line.
I have to admit that I was partially inspired to do this by Russell Brown's "Skeeter", although his is designed for rougher conditions than mine.

Saturday, December 19, 2009

Mbuli, a Pacific proa design


This is the "Squid" a Mbuli class proa designed by John Harris of CLC boats, and built by David Howie of New Zealand. It's a fast powerful design and was impressive at the recent New Zealand Proa Congress. Read more about this project at the Wikiproa.

Saturday, December 5, 2009

James Brett's "Free Radical"

James Brett's 16' "Free Radical" with a next generation junk rig performed well at the 2009 New Zealand proa congress. You can find out more at his website.