[hpv-boats] Low Weight Hull

[Clemens]

Wow, good news, Rick!
Congratulations, your flock is growing. 
I might have worked on the female mold where the three boards meet by
applying some resin on the joints.
10 kg - really means an ultralight hull.

Cheers Clemens

-----Ursprüngliche Nachricht-----
Von: hpv-boats-bounces at hupi.org [mailto:hpv-boats-bounces at hupi.org] Im
Auftrag von Rick Willoughby
Gesendet: Montag, 3. Dezember 2012 00:25
An: HPV
Betreff: [hpv-boats] Low Weight Hull

The first boat of my V16 pedal boat design variant is being built in Maine,
USA.

As well as being the first V16 hull that uses the 32 parameter Michlet shape
function for optimisation, it is also the first to be built in a female
mould.

The mould was made from low cost melamine coated particle board using a
slightly curved board for the bottom and two boards flared up from the
bottom to form the sides.  The mould is simple to make as it comprises just
three flat panels with stiffeners.

The shape is drag minimised for 120kg total displacement with a heayweight
pilot and sustainable power output of 120W resulting in a hull length of
6.4m.

The shell made in the mould using glass/foam/epoxy composite and vacuum
bagged during cure weighs 6kg and is near perfect finish over most of the
area:
http://www.rickwill.bigpondhosting.com/img_3967.jpeg
http://www.rickwill.bigpondhosting.com/img_3969.jpeg
The finished hull with bulkheads and deck panels should be under 10kg.

Rick Willoughby
rickwill at bigpond.net.au




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