Black Jack, Nose Job Arse Lift

They're loosing a bit of water line length there with that bow. Definatly not an all rounder. Even less so then Comanche
The loss of waterline at planing speed IS THE FUCKING POINT.

A planing hull is a super-cavitating foil. A foil with only flow underneath creating lift by high pressure, no flow over the top creating lift by low pressure. Across the water-air interface, supercritical foils work because it’s like an almost perfect near zero (relative) pressure above.

But all foils, including supercavitating foils, see increased lift to drag as aspect ratio Is increased.

This is exactly opposite of displacement speed sailing, where long and skinny is much better.

Lesson: if you want to go up to about 1.5 x sqrt(wl) then go long and skinny. If you want to normally go faster than 1.5 x sqrt(wl) them go fat and short. If you want to go faster than say 3 x sqrt(wl) then go foiling with active controlled foils, and hull is just pure aero drag, so again go long and skinny (like a sail plane fuselage).

If your class is run by cunts, then uncontrolled foils are a small increase between planing and foiling in limited conditions. To work and have any semblance of safety and economy, the foils simply must be actively controlled. Cunts are free to disagree, as is their nature.

Those crossover points are fuzzy and debatable, but in the ball park.

 

Sidecar

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3,252
1,645
Tasmania
A planing hull is a super-cavitating foil. A foil with only flow underneath creating lift by high pressure, no flow over the top creating lift by low pressure. Across the water-air interface, supercritical foils work because it’s like an almost perfect near zero (relative) pressure above.

But all foils, including supercavitating foils, see increased lift to drag as aspect ratio Is increased.

This is exactly opposite of displacement speed sailing, where long and skinny is much better.

Lesson: if you want to go up to about 1.5 x sqrt(wl) then go long and skinny. If you want to normally go faster than 1.5 x sqrt(wl) them go fat and short. If you want to go faster than say 3 x sqrt(wl) then go foiling with active controlled foils, and hull is just pure aero drag, so again go long and skinny (like a sail plane fuselage).
^^^^^^ This. And the planing bit is in between 1.5 and 3.0. I saw Comanche hit 2.89 during this race. She may have gone even faster.

 
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Sidecar

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3,252
1,645
Tasmania
And your point is?.... Who won this year’s race?.......... Who holds the record for the race?..... Was it designed for drifting?

And against boats specifically designed and modified for this one race.....

 
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trt131

Super Anarchist
1,607
323
Why do people still say it was a port/starboard incident.  It was not, read the protest decision.  But you are right WOXI really has the fastest time.

 

JonRowe

Super Anarchist
1,886
1,014
Offshore.
If you want the fastest time ignoring the rules, usually called the course record, that belongs to Sean Langman with Team Australia  :lol:

 

newbiesporty

Member
341
6
Are you shore of that ?

I remember reading about a power boat that set a course record for a Sydney to Hobart as well. 

Pulpit
No but he might be "sure".....

Forget what website you were on Pulpit? This is "Sailing" Anarchy where all forms of sailing can be discussed..... 

Untitled.png

 

pulpit

Super Anarchist
If you want the fastest time ignoring the rules, usually called the course record, that belongs to Sean Langman with Team Australia  :lol:


No but he might be "sure".....

Forget what website you were on Pulpit? This is "Sailing" Anarchy where all forms of sailing can be discussed..... 

View attachment 339408
Now Newbiesporty,

No, I didn’t forget what site I was on you turkey, the course record is held by the fastest Boat to cover the course and it wasn’t stated power or sail. A Power Boat does hold the record for the fastest Sydney to Hobart course. 

You just assumed it was held by a Sailing boat. There for you just made an ass out of yourself. Don’t worry it happens around here from time to time. 

Pulpit

 

schraz

New member
16
6
Has it been sold? Or is that the Old Esimit Europa ?

There was a boat Christening at the Yacht Club de Monaco this weekend, for a boat wich looks awfully similar! 

I am not aware of any other slim 100 Footers around, it is also entered for the Rolex Maxi Cup in Porto Cervo. 

Bildschirmfoto 2020-08-18 um 13.09.24.png

 

Chimp too

Anarchist
748
365
Europe
Whisker pokes under ERS definition. No limits on how many you can have set up  at one time. The windward one is not in use at this stage in the photo.

 

terrafirma

Super Anarchist
7,605
1,340
Melbourne
Has it been sold? Or is that the Old Esimit Europa ?

There was a boat Christening at the Yacht Club de Monaco this weekend, for a boat wich looks awfully similar! 

I am not aware of any other slim 100 Footers around, it is also entered for the Rolex Maxi Cup in Porto Cervo. 

View attachment 385536
See the Wild Thing Thread for all the latest pics and info on this boat above. 




 




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