Flettner rotor sail technology was invented more than 100 years ago. Modern need for fuel efficiency is bringing it back.
13
votes
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Wind propulsion now a force to be reckoned with in transport
9 votes -
‘Dolphin skin’ propeller boosts fuel efficiency of cargo ships
12 votes -
Japan's mini kei truck sales surge in US despite safety concerns
59 votes -
You're wrong about Aptera's car. It's ridiculously efficient (and solar powered).
24 votes -
A high-tech ferry in Sweden could soon set a new standard – Candela says its hydrofoil technology reduces the energy per passenger-kilometer by 95%
19 votes -
Which is easier to pull? (railcars vs. road cars)
5 votes -
Germany’s terrible trains are no joke for a nation built on efficiency
23 votes -
Should airships make a comeback?
25 votes -
Car safety and fuel efficiency improvements aren't driving up the cost of cars
4 votes -
Toroidal propellers: A noise-killing game changer in air and water
8 votes -
Tesla Model S Long Range Plus now achieves an Environmental Protection Agency-rated 402 mile range thanks to improvements in vehicle efficiency and design
5 votes