505 Builders

Trap twings are a device which moves the trapeze take off point further up the mast to support the mast top when the kite is up.  Remember when the 505 switched to the monster 6m kite it moved the kite halyard take off a metre up the mast beyond the hounds.  There are a couple of different systems, auto twings which move the take off when the kite is raised, or a simple system where you release a cleat.  They are needed as if you just had the trapeze take off further up the mast the crew weight does funny things to the rig and without them there is a good chance the rig will go over the bow downhill in waves

Don't forget that if you are off the wire righting moment has decreased and thus the loads coming from the sail must have decreased too.

So what number Waterat or Krywood should I be looking for? I am happy to update the boat as I understand the hull shape has stayed the same. when was the exotic material added to the boats and is there any mix of exotics you would stay away from?

Or there's the Black Edition A snip at twenty grand, er that would be the best part of 35 thou, USD

Edited by iGRF - 09 Aug 14 at 10:36am

Interesting question re what exotics to avoid. The new Parker has a carbon Kevlar option. I personally would avoid any Kevlar in the hull laminate. It does little useful in a race boat hull. Its stiffness is not that good and it is completely useless in compression. If it ever gets exposed it will fluff up and cause problems. It absorbs moisture. The only thing it could improve is the ultimate penetraion resistance in an impact ( not really an issue in a racing dinghy). Carbon skins maybe with a bit of glass on the outside skin are the best. On core materials -a Nomex honeycomb would give the best stiffness/weight properties, but this is not without its own issues and if it is not done right will be a horror. Cross-linked PVC is a good option generally for weight and properties.