Originally Posted by Rick01541
Adjusting backstay tension applies to masthead rigs as well as fractional rigs if it is setup with backstay adjustment. Tensioning the backstay on a masthead rig bends the mast
and flattens the mainsail
. This along with flattening the foot of the sail with the outhaul
depowers the mainsail
. The next step in depowering the mainsail is to reef.
It depends on the boat. If you have a deck
and no forward lowers or a babystay you are not going to bend the mast. You have to have something to keep the middle of the mast from moving aft to bend the mast on a masthead rig.
Tightening the backstay on a masthead rig does reduce the catenary on the forestay which allows you to point higher and flattens the sail.
Originally Posted by Neo
All good advice, but I find it helpful to also understand what was going wrong.
I don't think that in this case reefing the main (although it is the right thing to do) would have reduced the weather helm
I am a beginner but this is what I see:
He was well healed on a beam/broad reach with the main luffing
and tremendous weather helm
was all the way leeward).
I think he was probably a little past a beam reach and the boat was so healed over (due to the genoa
being all out, and maybe over trimmed) that the shape of the wetted hull
had him heading up. And the fact that the rudder
was almost horizontal made in difficult to correct. Sort of like rounding up and broaching with the spinnaker
Of course he should have been reefed and had much less genoa
out, I just think it might be helpful for the OP to also understand the dynamics at play.
Like I said, I am a beginner, does this make sense?
When heeled well over the assymetrical shape of the hull
in the water
is one reason. Another is that the sails
are to leeward of the boat, so the CE is to leeward of the CLR, the sails
are pulling forward not from where the drag of the boat is but off to the side making the boat round up.
I've been on a reach overpowered with just my jib
up and had massive weather helm.