The new DNA F1 A-cat

Thanks for the shout-out Bailey.

I thought the old boats were called the intergalactic fleet?

Intergalactic

started when the ISAF started giving people fits over using the word

World

in the event name. They threatened to ban sailors that participated in any sailing event with

World

in the title that wasn't an official ISAF event. Hence, some events started calling themselves the Intergalactic Championship instead. I think the Hobie Waves did this a few times.

I suspect in this case, that the A-cat

Intergalactic

event is another phrase we owe to that humorous Swedish John fellow <img src="<>/wink.gif" alt="wink" title="wink" height="15" width="15" />

So the 2016 global A-cat Low-Rider championships will be held where?

I keep coming back to something like

A1

and

A2

for the foiler/non-foiler but the dad-gum manufacturers have been numbering their models with number designations that this would be really confusing.

Maybe we need a couple of sponsors to make us like Busch Cup and Sprint Cup <img src="<>/grin.gif" alt="grin" title="grin" height="15" width="15" />

Green Room Graphics Cup sounds goo

I see the T rudders on this boat, but how are they adjusting the tilt of the daggers, or are they not? I didn't see any mechanisms on the hulls to adjust the rake of the boards/foils.

And I agree that adding a hard wing sail would make it even faster, but then you're really going to need a lot of help launching/retrieving it, more so if you have to insert the boards from the bottom with a full wing up on top, going to be a pita, and you'll need a big box to store the wing mast in too.

Rudder rake adjustment:

The top red plastic piece slides fore and aft to adjust the top of the daggerboard / daggerboard rake. Presumably there is a threaded wheel / line mechanism inside the hull to adjust the board rake.

Here's a LINK to the bigger picture.

Ahhhh, there it is! Thanks Jake. That is one slick looking beast!

For you guys who do foil, how much time, or how many times do you need to adjust the board rake while under way? Can you do it while out on the wire, or do you pretty much know about where to set it based on the wind/wave conditions, then set it and forget it? Is there an upwind setting, and a different one for downwind?

And once you set the starboard board, do you then have to crawl across the tramp to set the port board to match, or do they both move with one line?

Here's something else that flies, for only $16,000.

http://www.barnstormers.com/cat.php?mode=listing&main=

Click on the second add, the Kolb Firestar 2

wow.. is that a fish-eye lens on the camera? It almost looks as if one hull is longer (the near one) than the other (far one)...

Just looking at this gives me newfound respect for anyone who can fly this thing effectively with only two hands... let me think:
- adjust mainsheet/traveler
- adjust diamond tension
- adjust downhaul
- adjust daggar depth
- adjust daggar angle
- adjust rudder rake/angle

oh yeah... and steer, trap out, move weight around, etc.

How the F do you keep your

head out of the boat

with all that going on?

Timbo, normally we let the boards all the way forward for upwind and then pull them back before bearing away at the top mark to go downwind. You pull them back as much as needed and this can be done from the wire with most boats, just like adjusting your mast rotation. The rake systems generally have tight bungies that retract the deck sliders forward when the rake adjuster line is released.

The eXploders have come delivered with a system that allows adjustment of both boards from either side with a single line. The DNAs have been re-rigged in the US by their owners for this system too and I would guess the F1 has it built in.

In lighter air you need more lift and pull the boards back farther. In heavier winds, you are going faster and so the boards produce enough lift with a smaller adjustment. If you are sailing downwind and the boat isn't foiling, you can step back and help get lift off.

As boats begin to foil upwind, you may not have to adjust the boards at all. I don't know.

At first it seemed like the boats were getting more complicated to sail but over time we are finding they are getting simpler than the older ones. My process before the top mark is to pull the boards back and ease the rotator from the wire. So pull one line a foot or so and ease another the same and just play the mainsheet. Eventually I ease the traveler too. That is all you do until you reach the bottom mark. No need to adjust outhaul or raise boards or even cunningham now though it can be nice to ease the cunningham if I need power.

well, that is a relief to know that smart folk are working out simple solutions...

One of you will undoubtedly come up with a single control that switches from upwind mode settings to downwind mode settings (both pre-set by user based on conditions). Like a friggin lever with

UP

and

DOWN

Thanks for the explanation. Sounds like it's pretty much one setting for upwind, one for downwind, and you don't have to play with it too much while you are out on the wire, I'm guessing you do have to move your weight around, forward and back, to fine tune the ride height once up out of the water? And what happens in bigger waves or chop that's high enough to hit the front beam? Do you go up and over it, or plow through it? So both dagger boards stay full down all the time too, is that correct? And the adjustment is only a few inches between forward and back setting?

What happens if you pick up a weed or a trash bag on the bottom of the foil?

Tell you what, Timbo... Buy one and let us know <img src="<>/smile.gif" alt="smile" title="smile" height="15" width="15" />

Or (better) help out one of their regattas (mark boat) and watch the hotshots make it look super easy

Timbo, they're getting more of a four pointed lift out of both boards and rudders and are shifting toward a system where they use both daggerboards instead of raising one on each tack/gybe. The stability is increasing as a result. It's not totally unlike the lift distribution on a typical airplane but the wings on the rudders (aka, horizontal stab) are carrying more of the balancing load than they used to and it's getting closer to sitting on four legs instead of balancing on the daggerboards with the rudders providing attitude trim.

The issue with USED to be that the boat would porpoise badly trying to get to stable flight if they tried to more evenly distribute the lifting force between the boards and rudders (early Team New Zealand / Pete Melvin testing) but it looks like they've found a happy medium on the A-cat that results in pretty good stability and without the need to constantly adjust stuff. This may be where the foiling catamaran has an advantage over a foiling monohull (like a moth).

well said, Jake. I didn't know about how they proportion the lift. Interesting.

Yes, Timbo, the boards stay down all the time. This is great because it keeps the boat like a normal racing catamaran with good tacking and gybing. I do move my weight around a little to get lift off or fine tune the flight attitude but it is pretty subtle.

When you are sailing 12 to 18 inches above the water, the waves really aren't a factor like they used to be. You can surf down the longer ones still on foils and the bows will sometimes cut into the back of a wave but generally pretty impossible to stick the main beam unless you sail in bigger conditions than I'd ever want to sail in.

In Miami we had some pretty big chop this year at Bacardi Cup that would hit the main beam on occasion upwind. Downwind that chop and the big gusts associated with it were a little unnerving to foil in, so I healed the boat up and skimmed along instead. The boat won't foil when it is not flat and this is handy for coming in from the wire for jibes too. In skimming mode the boat just kind of touches backs of waves but doesn't bury like it normally would. Not as fast but still quick. In fact, on one race I was getting tired and tried sitting in downwind without the boards back to be more conservative. The boat actually was harder to sail because it kept stuffing waves and getting water over the main beam. I was surprised but I guess the manufacturers and foiling advocates who said lifting boards could actually make the boat easier to sail were right.

It's amazing how little change in board rake is required to make them foil and how much your body weight changes things too. The boards move back a max of 2 inches or so. I usually pull them back half way or a little more light air. If I don't foil, then I go back to the back foot strap and just stay in that one rather than the forward one and that usually does the trick.

Yeah, you first! I would like to see some at a regatta, when/where's their next big one?

A fellow a-cat sailor had an idea that I twisted around a little. Suppose the non-full-foiling type of a-cat is the LR (Low rider) fleet. Maybe NF fleet (not foiling)? That's generic enough and moderately sensible - or maybe something else along those lines.

Yeah, baby... low riders rule

I am good with low-rider. You like it better, Jake? Did the other A sailor as well?

Those low-riders are still fast. Ben Hall got 3rd overall on his DNA C board boat (missing what would have been a three way tie with two foilers for first by one point ) last weekend in Panama City with 24 boats. He was very fast downwind in light air and made good calls.

I don't care that much for the phrase

low rider

but

LR Fleet

has a ring to it. It makes sense and using the acronym will see everyone's recollection of what it stands for gradually fade at about the same time it simply transitions to being

what that fleet is called

.

I can't find anything that conflicts with it in the sport other than

Lesbian Robot

.

edit: Wait, crap...this was in the back of my mind and I finally placed it. Ian / John Lindal's boat, the LR3 (4, 5, etc) is a bit of a conflict with that. Curses.

exactly! He has the LR line up to LR-6 now.

That's also the term for a non-foiling moth fleet - low riders...

I suppose we could still go with it. I'm looking forward to rolling into the yacht club with THIS playing loud.

Does that mean that the foilers will be playing Steppenwolf's

Magic Carpet Ride

?

Totally, just not sure how you lay back and hang your elbow over the hull while you bounce up and down...

Technically speaking, I don't

roll into the yacht club

on my boat.

to the starting area...

LR had meaning in the sport for at least 15 years as Luna Rossa, did it not?

Maybe you can get the RC to play your theme song from the signal boat from your warning to prep. That could be fun.

Mike

There are apparently a few conflicts with LR but the more I think about it, conflicts with a two letter designation are going to happen everywhere. I'm starting to think that as long as it doesn't accidently interpret into something offensive, it's good. I vote let's go with

LR fleet

.

- As Mike pointed out it is consistent with what the Moth's naming for the full foiling / not full foiling fleets.

- It passes a logic test...the displacement/semi foiling a-cats do ride lower in the water than the full foiling boats

- I can't think of any way that anyone would consider it derogatory (particularly the acronym).

-

LR

is pretty bland from an age and value perspective so it shouldn't shape perception in an unfavorable way.