The photo above is a Twiggy Mk1 from France

This presentation documents the construction of a modified version of Lock Crowther's famous Twiggy Mk 2 trimaran

Friday, August 15, 2014

Mainhull frame 6 to transom - upper portions

frame 6 - forward side (head / shower)
you can see where the lower portion will scarf on

frame 6 - aft side
the timber reinforcing compensates for weakening caused by the cutouts
and also provides framing for dividers and ceiling under the forward crossbeam

frame 7 - forward side

frame 7 - aft side (galley)
you can see where the lower portion will scarf on

frame 8 - forward side (galley)
the lower portion will scarf onto the vertical timbers at each side of the hull

frame 8 - aft side

frame 9 - forward side (companionway)
extra timber reinforcing at the mast step / central deck stringer

frame 9 - aft side (cockpit)
the timber pieces for the cockpit seats are not glued yet
they will be removed to ease the scarfing operation
once the top and bottom portions of frame 9 are scarf glued together, 
then the timber pieces can be glued on 

frame 10 - forward side (cockpit)
hub for steering is ready
timber pieces not glued yet since they overlap the scarf

frame 10 - aft side
the timber pieces supply framing for a ceiling, 
and dividers under the rear crossbeam
the diagonal channels protect the steering chain / cables

frame 10 - steering installation
the fiberglass shield will cover and seal in a large stainless washer used
to attach the bulkhead steerer

frame 10 - steering channel
you can see the hole drilled in line with the steering channel
where the cable will pass thru the frame timber 
into the gunnel area and then over a pulley to the rudder area

frame 11 - forward side
you can see where the dividers will be glued in,
 creating 4 storage compartments under the rear crossbeam

frame 11 - aft side
you can see where the lower portion will scarf on

  • Note: there is no upper portion at frame 12
  • a large pop top hatch will span across the deck here
  • the hatch will incorporate a beam to support the deck / roof over the frame 12 area
  • the pop top hatch will extend from frame 11 to frame 13
  • making it about 5' x 7' and giving standing headroom in the aft cabin when popped up


frame 13 - forward side

frame 13 - aft side







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