trebor wrote:Looks great, a sunny day in winter here looks similar, apart from the michelin men sailing only their faces visible.
Looking at photos is the mast adjustable whilst sailing?
What effect does it have?
Whole books have been written on the subject...
I can't speak for that the Classic Moths are doing, as their needs may be different, but in Europes, Finns etc, where the boom reaches the deack at the back when closehauled, the windier it is, the more upright you have the mast, so that it bends more before the boom hits the deck when you pull the mainsheet in, so the sail flattens more.
Other boats do the opposite - the mast will be raked back further in a blow - the Supenova and Contender are examples of this. Though doing the opposite, because of the mast bending more in the Europe etc, once sailing the effect is the same - the Cof E has moved aft, allowing you to raise the centreboard a bit in a blow to take heeling pressure off the hull yet keep the balance right. A pivoting board like on the Contender comes into its own here.
Other boats (the Firefly is one) will rake the mast aft when going upwind, and pull it forwards going down wind. The Star is the most extreme version of this.
Boats with mast pots loose out on all of this (though the Laser's, I think is elongated fore and aft a little?) so have to find ways round it all - one reason why a decent kicker with plenty of travel is a useful thing to have.
However, the subject is far more complex that this, and even people far clever than me disagree about why certain things work...