terrafirma
Super Anarchist
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- #281
Tack over to the Sydney to Hobart thread for Wild Oats info , pictures and videos. And Social Media links
Black Jack, Nose Job Arse Lift
- Thread starter terrafirma
- Start date
carcrash
Super Anarchist
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.
^^^^^^ 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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Monkey
Super Anarchist
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Swanno
Super Anarchist
Remembering that Wild Oats sailed the fastest time but was docked time due to a port starboard giving Comanche both LH and the record.
pulpit
Super Anarchist
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
DtM
Super Anarchist
and I am pretty sure Sean didn't start from the usual S2H start line.
newbiesporty
Member
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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.....
SCARECROW
Super Anarchist
its interesting to see how few boats are on that list, especially when you realize a couple are there with multiple names like Banq Pop V / spindrift 2
pulpit
Super Anarchist
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
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.
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.
jackolantern
Super Anarchist
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Wild thing
The Dark Knight
Super Anarchist
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Raptorsailor
Anarchist
DickDastardly
Super Anarchist
This has been done to death. They are classified as whisker poles under IRC, or they were. I can't recall whether IRC has moved against them but race boats have been using them for some while now.
terrafirma
Super Anarchist
- Thread starter
- #300
