Luna Rossa Challenge. AC 36

[pbenett]

Is it just me, or the bottom of the boat seems far from being smooth? It looks sort of unfinished. 

 

[WetHog]

Luna Rossa apparently. 

Its not Luna Rossa Pirelli?  

WetHog   h34r:

 

[Stingray~]

 

[WetHog]

Interesting curvature of the deck from bow to stern.

But it passed its first test, it floats!

WetHog   h34r:

 

[The_Alchemist]

The work on the Italian bulbs seems much cleaner than that of Defiant's which looked rather rough. May be the Italians have greater skill here? Hard to see any sign of a movable flap on their foils. Are they permitted to rotate the entire wing?

Are you sure about that?  The LR foil looks more like a couple of fins stuck onto a symmetrical bulb.  The AM foils look to have a very intentional design that looks more like a bird in flight with flaps.

 

[WetHog]

What difference does it make what the foils look like now?  These are just testing foils and the foils that matter won't be advertised, right?

WetHog   h34r:

 

[The_Alchemist]

View attachment 324681

Is the boat tipping towards the camera, or is that just an optical illusion?

It is interesting how the decks of the three boats are very similar, with the AM being just a bit more rounded on the edges.

 

[Ex-yachtie]

Three super-high quality boats launched - amazing effort from these teams interpreting a new rule.

ETNZ are an outlier in respect of their foil design.

AM do not have the bustle - a more aero hull.

It will be really interesting to se the next iteration of these boats.

AM are the outlier in terms of things that matter.  They're starting to look like they've missed a trick with their hull design.

 

[The_Alchemist]

What difference does it make what the foils look like now?  These are just testing foils and the foils that matter won't be advertised, right?

WetHog   h34r:

they can only make 6 foils!

 

[The_Alchemist]

AM are the outlier in terms of things that matter.  They're starting to look like they've missed a trick with their hull design.

Or they plan on it being out of the water more than the other teams.  They could be the ones that figured out the trick.

 

[Stingray~]

they can only make 6 foils!

Which makes it interesting that LR launched with 2 identical foils, apparently and assuming they are real.

Perhaps, since they like AM have torpedos, they can do a lot with fins because of how much weight is concentrated in them and could remain unmodified? edit: I see that was pointed out above already

 

[The_Alchemist]

Which makes it interesting that LR launched with 2 identical foils, apparently and assuming they are real.

They touched the water, they count towards the six.  It would be incredibly stupid to waste 2 foils.

 

[17mika]

So basically everybody has done the same decision about deck layout, with the fixed grinders and mainsail endplating (which will definitely come as well later in AM).

I wonder how much righting moment is lost, but probably the aero gain and grinders output gain is bigger than that..

 

[dbeauvar]

They touched the water, they count towards the six.  It would be incredibly stupid to waste 2 foils.

The two foils are slightly different. One has fences, and the other looks slightly longer (maybe optical).

But they sure are more locked toward this shape of foils, no T-shape for LR.

Regards,

D.

 

[RCH]

Luna Rosa missed the mark on those foils. Just saying.

 

[Ex-yachtie]

From Farevela's fb page

View attachment 324645

Very short chord length at the bottom of the rudder?

Edit: Or perhaps it's just really long chord length at the top?

 

[buckdouger]

Torpedo not a foil. Can't see the point unless to add some lead ballast or as structural support for the foils.

Do the Italian foils have less area than TNZ and AM. Seems to look like it.

As for hull shape if the aim is to sail the majority or all the race flying, then the Italian hull looks like more drag.

Also surprised that they are not using two different foil designs on either side. With the limit on the total number allowed seems a sensible  choice by TNZ

Not sure that they are the same. Fences on starboard only? 

we focused more on hydro-dynamism than on aspect of air performance ".

Hydrodynamics - the motion of fluids and the forces acting on solid bodies immersed in fluids.

Does this mean the Italians think the hull will be in the water more than the other teams?

Cleanest sprit, aero drag is pretty slick, transom most tapered (?) plus round all the way back. Chines on NZ not aerodynamic, deck plate on AM looks clumsy, but their cockpits have a nice chamfer at deck height. 

The way I read his comment in italian is that it is about minimizing drag at takeoff, but not sure.

Agreed, also wondering if the anhedral/dihedral foils plus the skeg/keel is designed for takeoff drag minimization. The hull provides leeway resistance with minimal foil arm in the water, but the lifting part of the foil still provides good lift at high foil arm cant angles because of its angles.

 

[Ex-yachtie]

So what do we think happened here?  Did Jimmy drive the forklift into the side?





Edit: Shit, sorry, wrong colored lines.

 

[Tornado-Cat]

Very short chord length at the bottom of the rudder?

View attachment 324694

Most beautiful boat to date.

 

[JonRowe]

Italy doesn’t share the US requirement that a painted flag faces the bow

Really? So the US requires the flag to be reversed on the starboard side... how backward. </pun>