Critical Section

l'Hydroptère flys!

Monday,  09/07/09  09:40 PM

Saturday I noted that foiling trimaran l'Hydroptère set new world records for 500m and 1,000m, exceeding 50 knots.  Wow.  Here's a video of the record run, well worth watching for sheer coolness.  I cannot stop watching it.

Some notes to add on this amazing vessel:

  • It is a real boat, on real water.  It can go any point of sail, and seems to be able to handle fairly rough open water in the ocean.  Sometimes one-shot speedboats built for setting record only go on one tack and only in flat water.
  • The rig is pretty "normal".  Sure they're flat carbon fiber sails, but the setup is a basic sloop, nothing weird going on at all.  Sometimes people think to go 50+ knots you need hard wings or something.
  • The design of the hydrofoils is really clever, because they counteract heel as well as lifting the boat out of the water and reducing drag.  As the boat heels, the lee foil become more horizontal, generating more lift, and the weather foil becomes more vertical, generating less.  The resulting forces balance the heel.  As a result you see the boat powering along staying flat, despite gusts of wind in the 20-30 knot range, and an apparent wind of over 60 knots.
  • The design of the rudder is really cool, it has to act as a lifting foil as well as steering device.  You can see it clearly in this picture of the triamaran, after it turtled going 60+ knots!

Perhaps we could say that for this design, the sky's the limit :)

this date in:
About Me

Greatest Hits
Correlation vs. Causality
The Tyranny of Email
Unnatural Selection
On Blame
Try, or Try Not
Books and Wine
Emergent Properties
God and Beauty
Moving Mount Fuji
The Nest
Rock 'n Roll
IQ and Populations
Are You a Bright?
Adding Value
The Joy of Craftsmanship
The Emperor's New Code
Toy Story
The Return of the King
Religion vs IQ
In the Wet
solving bongard problems
visiting Titan
unintelligent design
the nuclear option
estimating in meatspace
second gear
On the Persistence of Bad Design...
Texas chili cookoff
almost famous design and stochastic debugging
may I take your order?
universal healthcare
triple double
New Yorker covers
Death Rider! (da da dum)
how did I get here (Mt.Whitney)?
the Law of Significance
Holiday Inn
Daniel Jacoby's photographs
the first bird
Gödel Escher Bach: Birthday Cantatatata
Father's Day (in pictures)
your cat for my car
Jobsnotes of note
world population map
no joy in Baker
vote smart
exact nonsense
introducing eyesFinder
to space
where are the desktop apps?
still the first bird
electoral fail
progress ratches
2020 explained