in board sheeting?

[capta]

The staysail stay is on a Highfield lever. That staysail is a bit small for a blade, but I would like to design a mule for it one day, that will sheet inboard.
I was just wondering if the loss of sail area would be worth the pointing ability with a blade on the headstay.

 

[jssailem]

I was just wondering if the loss of sail area would be worth the pointing ability with a blade on the headstay.

That is an interesting question. I would suspect the boat hull design would be a factor. At what point does the increased angle of attack achieved by the jib cause issues on the main?
I think Arvel Gentry's work in this area may be some answers for you. PDF More on the Slot Effect

Will your hull benefit from the blade on the headstay by permitting the boat to travel at a speed that better uses the apparent wind speed at the headstay?

 

[capta]

That is an interesting question. I would suspect the boat hull design would be a factor. At what point does the increased angle of attack achieved by the jib cause issues on the main?
I think Arvel Gentry's work in this area may be some answers for you. PDF More on the Slot Effect

Will your hull benefit from the blade on the headstay by permitting the boat to travel at a speed that better uses the apparent wind speed at the headstay?

Given the winds we normally sail in, we have a reefed main, as in the pics beside the post, and a roughly 100% Yankee. Speed isn't our problem and with the board down to around 10', I don't think leeway is either.
It's just that we bring the apparent wind so far forward the outside sheeting begins to limit her windward ability.

 

[jssailem]

I seem to remember the phrase... Gentlemen don't sail to windward...
Not sure of the author but this image appeared as I was looking for the author..

 

[DArcy]

this image appeared as I was looking for the author..

It's interesting that the Kennedys were fairly wealthy but they kept sailing the little Victura. Must have been a great boat.
Victura has an interesting jib sheet arrangement which you can see in this photo. There is a short strop attached to the clew with an eye that the sheet runs through. The sheet is lead from a deck fitting through the eye, back to what looks like a cam cleat on the cabin top.

 

[shemandr]

The staysail stay is on a Highfield lever. That staysail is a bit small for a blade, but I would like to design a mule for it one day, that will sheet inboard.
I was just wondering if the loss of sail area would be worth the pointing ability with a blade on the headstay.

I'm saying yes. Most of the drive of a sail is in the first 1/3 for going upwind. The latter 2/3 for a gennie is about not creating drag. I.e. flat. If I could scan the the graphical represenation of this I would. But ....... I can't. But it comes from the Avril Gentry references to aeronautic reseach. Sail area/Speed is a downwind phenomena. Upwind it's more about lift/drag.

 

[danstanford]

It has to be about more than sheeting angle, look at footage of a TP52, It looks like the luff of the jib is about a foot away from the mast and virtually parallel to it. There are some good shots on YouTube of this. In any case the sheeting angle is likely a about a third of mine and I know that if I inhaul mine too far I do choke off the slot so it isn't just about angle.
Dan

 

[Drinky Crow]

Oh wow that looks nice! How come the pics you took of me turned out so lousy?!