OK its set up like I expected... It is not 2:1, you have no mechanical advantage on the halyard. All it does is eliminate the separate tack line and combine it with the halyard. Some Tigers have the same thing only it is done at the tack end instead of the halyard end. The reason you have more line to pull is because the same line acts as the tack line and the halyard, so you have that much to pull instead of pulling two different lines. Theoretically it should be faster than two separate lines... More friction though...

That is not 2:1!

2:1 at the lower half of the mast pulling 1:2 at the top

2:1 v 1:2 = 1:1

If you actually did manage to get 2:1 halyard then you would have approximately 9 meters of extra halyard on the deck with the kite is hoisted.. MADNESS!!!!!

Have always had a separate tack on my cap, it wasn't setup particularly well and tended to not cleat and be a bit painful to use but after a lot of tweaks it works every time reliably. the aforementioned advantages are well worth the effort.

The only thing I would add is having the tack line tail taken back up the tramp is not for me. I prefer to have mine shock corded to main beam, it leaves about a 1 meter loop on the deck but when the kite is being doused there is no friction added to the system. better for the kite, better for the crew.

Ah, pulley math... fun stuff.

I stand corrected, it is as the above mentioned, 1:1 (forgot the tackline wasn't dead ended).

I do feel that in practice the tackline gets out first, essentially dead ending that part of the system, which gives you (and again, I'm probably wrong) a 2:1 for the spin halyard in the last / hardest part of the hoist.

Sorry for the confusion.

I sailed 12 Skiffs with a 1:2 purchase...... Kite goes up real quick. Problem is you don't have enough tail for the retreival line which does not concern them as they bag their kites.

bag a kite? so old school.... I would love to try one of those, did my time on an i14 at some point, fun fun.

I guess if they wanted they could hook up a separate line as a retrieval line and just have the tail sucked up via bungie and a series of blocks....

A 12 hull does not leave a lot of room for a snuffer.

We have a local world fireball champion, when everyone in fireballs were using snuffers he opted to go back to the bag.

Using a 1:6 system the skipper would hoist the kite while the crew threw the kite into the air. the results were sets inside 2 seconds, the fastest in the fleet. a side bonus was the boat didn't fill with water from waves going down the snuffer.

apparently it was a easy worlds to win as no one ever got close.

Has anyone ever done a reverse purchase, say 1:2 on an F18? I would think the load would increase too much to handle in big breeze... But could be a nice addition if not.

Interesting....

It'd probably be pretty simple to make it so you could change it out as well. Maybe not on the water, but in the morning make a change for the conditions.

I would think that'd be a sever SOB to pull up in any kind of wind though.

I know that some use a 1:2 system to pull out the tack, it doesnt add much more resistance but makes it easier to pull (1 short vs 1 long).
Dont think it would work for hoisting unless you have a bodybuilder-type crew.

I threw the idea around in my early days on the Tornado. I beleive it was John Forbes who said he tried it and the loads were to great. Also gave the spinnaker extra purchase to pull the halyard through the cleat when you did notwant it to.

We had 1:2 purchase on the Hobie Tiger tack line (split system). When I tried it on the Tornado we trashed a couple of cleats. TA what's on Griffo's boat now?

I tried the 1:2 on the separate tack line. Way too much load.

The 2-line system also allows us to tweak on the luff shape.

And occasionally we can ease out the tack if we need to point a bit higher. I'm still playing with that option. I'm not sure I am using it to its fullest.

I did. It was fast (I timed myself doing it in 3 seconds). My crew had to pull really hard to get enough luff tension. The other problem is that there is a lot of extra halyard sitting around when the spinnaker is down because the retrieval line goes out more than the halyard goes in.

As a big strong dude in his 20's that like to fiddle with stuff, I would setup something like this if I was crew and make the retrieval end 1:2 as well.

If your crew is not huge, they will spend so time trying to pull the last little bit to get enough luff tension that it is slower than 1:1. Also, note that the cleat will have to take twice as much force.

I tried the 1:2 tack line on the Capricorn also but went away from it due to the load.

Griffo now has a seperate tackline 1:1 through a spinnlock, same as I had on the Cap.

Thats kind of what I expected.