I want to see you do that singlehanded in a contested fleet.

Wouter

Wouter, you can do it from the wire. You just have your tack line fed to the outside of the front beam and then set parallel to the starboard hull with a bunjee take up. Trust me
I used this system at the UK 2007 Nationals. However, I found it a bit to unreliable especially when you happen to trip the tack whilst gybing!! It's also a bit scary if you get a bit carried away with your new toy and pull the tack out a bit to soon and the spi starts to fill backwards whilst creeping out of the chute prior to the mark rounding. Therefore, I think the double line system suits the two up's better and due to the simplicity of the single line system it benefits the singlehander.
Scooby enjoys tinkering with various elaborate systems I wonder what his preference is?

AHPC seems to have settled on having a single line halyard/tack system with the head-to-head block up the mast rather than on the spin pole. What are the advantages of the location on the mast?

We had a whole discussion a while back about the merits of the various possible single line systems.

Its the only way you can run a internal tack line, with a combo line.

Karl, with your system, have you ever accidently -tripped- the halyard [and tack line] loose with your feet, during a gybe?

Whatever system you use is mostly a matter of what you are used to.

I sailed always with a single sytem solo and the split system 2-up. After I got used to the split system solo, I much prefer it now.

There are 2 different lines to to pull, but there is less line. The biggest advantage is that you can do the hoiste and the dowse in stages, greatly improving your ability to keep control of the boat when things get bussy.

Ditto, I've tried it both ways and I prefer two lines both solo and two up. As Gilo said, it keeps the spin from going under the bow if you've got to stop snuffing to steer!

Single line for me. Just pull and it goes up; juys pull and it comes down....

I do however have some clever stuff on the mast rotation adjustment....

Pull a line on the boom and the rotation is let "fully off". As the kite goes into the bag; it's re-set to the same place it was when it was let "fully off".

Pics?