Earth, Wind & Water

Ramblings of an Earthling, Laserite and small boat sailor

Wednesday, June 2, 2010

Chockablock!

One of the things I like about sailing is it's rich vocabulary, and the way has given it's words and expressions to general usage.  Expressions like "leaving yourself leeway", "having the wind knocked out of your sails", "liking the cut of someone's jib", and "being stuck in the doldrums" are so commonplace in everyday use that most people don't stop to think about where they come from.

As an aeronautical engineer, I love the aviation terms that have come from sailing - rolling, pitching, and yawing; surging, swaying, and heaving; buttlines, waterlines and stations, and indeed the name of the field itself, aeronautics. Bulkheads, rudders and strakes, the list goes on and on.

I'd been sailing for many years before I realized that the term chockablock comes from sailing.  The first definition given by Webster's is pulled so tight as to have the blocks touching, and the etymology refers to the preceding entry, chock, another bit of nautical hardware.  I'm not sure if the "chock" in chockablock comes from that type of chock or from the chocks, or cheeks of a block, but either way, I like the expression a lot more now that I know where it comes from.

We Laser sailors often talk about being two-blocked, or block to block, but i think we should revive this nautical term and instead say chockablock!

Tuesday, May 4, 2010

Race for Z-Prix Heats Up! May 4, 2034

Sailing in the second Space Age.



Excitement is building in the Z-Prix competition for the first solar sail propelled vehicle to leave the solar system, that is to cross the threshold known as the heliopause.  Surprising everyone but herself, the competition was sponsored by Ansari Dhuka, oil sheik, after an epiphany in the sun-scorched Empty Quarter of Saudi Arabia.  For the subsidized price of $6m, teams are supplied launch services into low earth orbit.  From there, they must proceed propelled only by the sun, driven by enormous solar sails.  The teams are chasing a $10m prize for being the first to leave the solar system, and a consolation $6m prize for being the fastest, i.e. quickest voyage to deep space.  Spectators can check the progress of the race and solar weather reports at z-prix.org. Here are snapshots of the four most serious entrants to the competition.

Icarus - Designed by a team of hot-headed Greek engineers, this audacious effort calls for a risky mission involving mind-bogglingly complicated orbit transfers and multiple, close flybys of the sun.  The flight plan is considered brilliant, but the red-hot rays may be just too dazzling for the space craft to survive its close encounters with the sun.  Sponsor: Onasis Odysseus, Greek Shipping Magnate. Odds: 10 to 1, but will surely shorten if the craft survives its first solar flyby next month.

Ufudu - Meaning tortoise in Zulu, this spacecraft is indeed slow but steady.  Blasting off in 2021, it was by more than a decade the first mission to launch. A simple system with a conventional mission plan.  Plodding ahead of their competition, they have already cleared Mars and the treacherous asteroid belt.  Co-sponsors: Marx Shuttlecock, South African IT wizard, famous supporting open source software and for being one of the first space tourists. Nicknamed "the Afronaut".  Oxen Musk, South African pioneer of electric cars and commercial space flight.  Odds on, hot favorite with the bookies. 4 to 3

Solntse - This Russian entrant is seeking to win the competition through sheer sail power.  Measuring 5 km in diameter, the mass of the sail exceeds the mass of the hull by a factor of 8 to 1.  Some have frowned upon the use of nuclear technology to power control and communication systems, where all other teams have relied on photovoltaic cells. The response from the design team has been, "Russian technology likes abuse! It's simple and robust.  Let's see how well those photovoltaic systems from the other teams work once they're out past the Kuiper Belt".  Scheduled to launch later this year.  Sponsor: Vladimir Khodorkovsky, heir of oligarch. Widely mocked for his perpetual tan and habit of strutting on Black Sea beaches. Odds: 20 to 1.

Sun Devil II.  Designed and built by students and faculty at Arizona State University, this is a solid-looking entry, sporting inflatable sails.  Currently making it's way out of earth orbit.  Multiple aerospace industry sponsors.  Odds: 2 to 1.

A writing project suggested by Tillerman

Tuesday, April 20, 2010

High vs Higher Performance Sailing by Frank Bethwaite


Several big online book retailers have made the mistake that Higher Performance Sailing is merely the second edition of High Performance Sailing.  It is not.  It is a completely new book.  I know this from my own correspondence with the author, and I recently got hold of both books.

To this sailor, engineer, and workshop tinkerer, they are nothing short of inspirational.  So far, I've only dipped into the books in places, but I'm already inspired by the advances the Bethwaites made by careful thought, clever experiments, and bold new thinking carried forward into practice.  These books remind me of Carrol Smith's classic book on motorsport engineering, Tune to Win, the pinnacle of his much admired "... to Win" series.

To get back to my original point, the books, referred to by Frank Bethwaite himself as HPS1 and HPS2, are two distinct works.

So, instead, here's something useful which would be difficult to find elsewhere online, the table of contents of both books:

High Performance Sailing

Ch. 1  The Racing Helmsman's Wind
Ch. 2  The Gradient Wind
Ch. 3  The Two Surface Winds
Ch. 4  Light Airs
Ch. 5  The Breeze over a Cool Surface
Ch. 6  Friction and the Wind-Wave Patterns
Ch. 7  Heat and Thermal Patterns
Ch. 8  Winds near Clouds
Ch. 9  Winds near Shores
Ch. 10 Wind Appraisal and the Stability Index
Ch. 11 Race Preparation
Ch. 12 Sailing the Wind Patterns
Ch. 13 Waves
Ch. 14 Depth and the Warm Surface Layer
Ch. 15 Currents and Tidal Stream
Ch. 16 The Quest for Speed
Ch. 17 Sails
Ch. 18 Rigs
Ch. 19 Foils
Ch. 20 Hulls
Ch. 21 Scope
Ch. 22 Handling to Windward
Ch. 23 Kinetics
Ch. 24 Sailing Crosswind
Ch. 25 Sailing Downwind

Higher Performance Sailing

Ch. 1  The Origins of High Performance   
Ch. 2  The State of the Extreme Arts
Ch. 3  Review of Wind Dynamics
Ch. 4  The Spectrum of the Wind
Ch. 5  The Quick Gust Peaks
Ch. 6  Surges and Fades
Ch. 7  The Drive to Sail Faster
Ch. 8  The Materials Revolution
Ch. 9  The Design Response
Ch. 10 Hulls that Don't Baulk
Ch. 11 More Power - Trapezes and Wings
Ch. 12 Handicaps, Performance Equalizations, and Turns per Mile
Ch. 13 Sail Forces in Steady Airflow
Ch. 14 Evolution of the B-18 Marque
Ch. 15 Design Refinement for Long-course Speed (by Julian Bethwaite)
Ch. 16 Design Refinement for Short-course Maneuverability
Ch. 17 The 49er
Ch. 18 Transition Years
Ch. 19 The 29er
Ch. 20 The Critical Ratios
Ch. 21 The Evolution of Manual Adjustment
Ch. 22 The Automatic Rig
Ch. 23 The Evolution of the Sailing Simulator
Ch. 24 A New Way of Thinking
Ch. 25 The Simulator Printout
Ch. 26 Fast Handling Technique
Ch. 27 Handling an Apparent Wind Skiff
Ch. 28 Sailing the Foil Moth (by Rohan Veal)
Ch. 29 Racing with Speed: 'Connecting the Dots'

Safe trip over water


Fishing hooks made by the Mauri in New Zealand have evolved from being functional hooks made of whale bone to being ornamental good luck charms made of various materials.  Whale bone is now rare, so bleached cow bone is often used instead, and moving to more exotic materials, they are often made of jade, or greenstone, as it is locally known.  This particular one is made out of metal and paua shell, which is similar to mother of pearl.

Ornaments of different shapes have different meanings.  The triple twist signifies two people or cultures joining together for eternity, while the single twist represents the paths of individuals, separating and coming back together, (which is apt given the "overseas experience" had by many young people living on an isolated island nation).  The spiral signifies the unfurling fern bud and connotes new beginnings, while the Hei Tiki brings fertility.  The fishing hook is meant to bring strength, good luck and prosperity, and safe journeys over water.

In related news, my parents are home from New Zealand.  Thanks, Mom and Dad.

Thursday, April 1, 2010

Walkabout


Back from my walkabout. First time I've driven my car to the sea. So, customary sporadic service could have resumed today, but instead it will tomorrow. Probably.

Friday, March 19, 2010

Beautiful Stranger


I was going to write a post with some original content, but once the idea popped into my head, how could I resist a song with this title, especially given the Austin Powers segue?

Thursday, March 18, 2010

Even Stranger Cargo


Some more William Orbit. Early 90's psychedelia from his Strange Cargo III Album. (insert Austin Powers voice) Groovy Baby, Yeah!