Thursday, March 25, 2010
Stress Less Refit
Decisions, decisions...
The bare hull shell that was stress less is sitting at Markla's parents place gathering dust and snakes. As part of determining whether it is feasible to rebuild it, I present an early rendering. Current thinking is to move towards socketed beams rather than what's shown. Maybe something similar to whisper but without the freestanding rig, a stump stepped mast perhaps. The stress less hull is very narrow but relatively light so I see no reason it can't be converted to a foiler. It will need some carbon reinforcing from mast to cb case though. The biggest problem is finding a place to do the refit.
Foils are also an issue. Markla has been investigating the design for a home-built set and we've got heaps of ideas for building them relatively easily. More on that later though.
Lots to think about...
Monday, March 22, 2010
Moth Tattoo
Wednesday, March 17, 2010
camber control
Heard Amac interview talking about how long it takes to trim sail in light weather conditions, i thought this might help.
Glue this device to your deck to provide 100mm throw on the middle control line with a total purchase of 24:1.
Everything is shown to scale.
Assuming vang of 16:1, 6:1 for down haul and 2:1 for outhaul so at 24:1 I am matching the current amount of purchase. With larger diameter rope with an easier pull the overall effort for skipper should be less.
Two features to make it easy to adjust:
- Series of holes in lever, move the take off up the lever to increase the throw of a particualr system
- Turnbuckle on each control line to set the zero point of each system.
To
It doesn't need to be a single module (could be split into cleat base and lever base) but this way the loads are contained within it rather than applying bending moments to the deck.
Grey is carbon, cream is 80kg foam.
Carbon is moulded from a bent sheet metal mould. Port and stbd halves moulded up, glued to foam and a bridging laminate links the two cleat bases.