The Fastest Sailboat in the World

December 13, 2012 by kris de decker Filed Under: Random, Sailing ships, Travel, Wind Power

fastest sailboat in the world

The Sailrocket, a sailing boat that we have talked about before, is the fastest craft under sail, after breaking the 2010 record held by a kiteboarder.

During the last run in Namibia in November 2012, an improved version of this unconventional boat reached an average speed of 65.45 knots (121.21 km/h or 75.31 mph) over a distance of 500 meters. Earlier this year it set speed records of 59.23 and 59.37 knots.

Record sailing speeds have almost tripled since the beginning of the 1970s. Those who think that sailboats are a technology from the past, think again.

See and read more at YachtPals and Sailrocket.

Designing for Velomobile Diversity

December 5, 2012 by kris de decker Filed Under: Pedal power, Quadricycles, Travel, Tricycles, Trikes

SoftShell-Velomobile-concept“Velomobiles currently appeal to niche, enthusiast markets through a range of both low scale production and D.I.Y processes.”

“This paper explores the current limitations in promoting velomobiles as a commuter alternative to the automobile in that it proposes velomobile diversity be approached through the application of dynamic, emotive styling, vehicular packaging variations and functional storage, together with the use of sustainable construction materials with techniques that reduce assembly and fabrication costs.”

“To this end, the paper discusses two conceptual case studies that explore applied industrial design processes, diverse construction and alternative manufacturing techniques. Both are positioned outside current fabrication processes, where one explores ‘natural’ production – specifically, the pre-harvest deformation of bamboo with shape tessellation to reduce parts complexity whilst allowing natural processes to fulfil pre-determined forms – and the other reuses post-consumer waste in an interminably variable tensegrity frame construction designed for continued open-source development.”

Designing for Velomobile Diversity: Alternative opportunities for sustainable personal mobility (PDF). Alexander Vittouris and Mark Richardson, 7th International Velomobile Seminar, september 2012. Picture: Softshell concept velomobile.

Previously: Electric velomobiles: as fast and comfortable as automobiles, but 80 times more efficient.

Wooden Bicycle Rims

November 1, 2012 by kris de decker Filed Under: Bicycles, Bikes, Random, Travel, Wheels, Wood, Woodworking

wooden bicycle rims

“They are hard to build with, they require regular maintenance, they are expensive and they flex a lot. However, if you want a traditional looking wheel, avoiding metal altogether is a marvellous move, something that we’re lucky to still be able to do today.”

Cerchio Ghisallo has been producing wooden rims since 1946, and in this video father and son show how they do it. Inside Cerchio Ghisallo part 1, part 2, part 3.

More about wood rims: Building with Wooden Rims / Cycling before Lycra / Wheel Fanatyk / Is Wood the Goods? / Wood Sprints /Cerchio Ghisallo / Sacro Bosco Bicycle works / CB Italia.

Picture: d’Annata by Sartoria Cicli.

Bicycle Trailer with Solar Panel Charges Electric Bicycle

October 11, 2012 by kris de decker Filed Under: Bicycles, Bikes, Pedal power, Solar, Travel

Bicycle Trailer with Solar Panel Charges Electric Bicycle

“The electric bicycle has become a very long way in recent years. However, the lack of luggage space and limited range of the battery makes the electric bike less suited to long distances. Solarwind, designed by architect Raf Van Hulle, offers a solution.

The trailer provides extra luggage space and is fitted with a solar panel to keep the electric bicycle’s battery charged.”

Solarwind.

How to Carry a Foldable Workshop on The Rear Rack of Your Bicycle

October 8, 2012 by kris de decker Filed Under: Bicycles, Bikes, Cargo, Cargo cycles, DIY, Travel

foldable workshop

Instruction manual. Thanks to Berto Aussems.

Finally: A Life Cycle Analysis of Electric Cars

October 8, 2012 by kris de decker Filed Under: Batteries, Ecotech Myths, Electric vehicles, Travel

Trexa-ev3“We develop and provide a transparent life cycle inventory of conventional and electric vehicles and apply our inventory to assess conventional and EVs over a range of impact categories. For all scenarios analyzed, the use phase is responsible for the majority of the global warming potential (GWP) impact, either directly through fuel combustion or indirectly during electricity production.”

Total emissions

“When powered by average European electricity, EVs are found to reduce GWP by 20% to 24% compared to gasoline ICEVs and by 10% to 14% relative to diesel internal combustion engine vehicles (ICEVs) under the base case assumption of a 150,000 km vehicle lifetime. When powered by electricity from natural gas, we estimate EVs offer a reduction in GHG emissions of 12% compared to gasoline ICEVs, and break even with diesel ICEVs. EVs powered by coal electricity are expected to cause an increase in GWP of 17% to 27% compared with diesel and gasoline ICEVs. Wind power electricity would allow electric transportation with life cycle carbon footprints as low as 106 g CO2-eq/km.”

Vehicle production: Manufacturing one electric car takes as much energy as manufacturing two conventional automobiles

“In contrast with ICEVs, almost half of an EV’s life cycle GWP is associated with its production. We estimate the GWP from EV production to be 87 to 95 grams carbon dioxide equivalent per kilometer (g CO2-eq/km), which is roughly twice the 43 g CO2-eq/km associated with ICEV production. Battery production contributes 35% to 41% of the EV production phase GWP, whereas the electric engine contributes 7% to 8%. Other powertrain components, notably inverters and the passive battery cooling system with their high aluminum content, contribute 16% to 18% of the embodied GWP of EVs.”

“Comparative Environmental Life Cycle Assessment of Conventional and Electric Vehicles“, Troy R. Hawkins, Bhawna Singh, Guillaume Majeau-Bettez, Anders Hammer Strømman, in “Journal of Industrial Ecology”, October 2012. Via the BBC and Treehugger. Picture: Trexa. Previously: The status quo of electric cars: better batteries, same range.