The XL1 is an automotive hero that follows pure sports car design principles: low weight (795 kg), perfect aerodynamics (Cd 0.189) and a low centre of gravity (1, 153 mm high). This gives the efficient Volkswagen the ability to cruise on the road at a constant speed of 100 km/h using just 6.2 kW / 8.4 PS. In all-electric mode, the XL1 requires less than 0.1 kWh to cover a driving distance of over one kilometer.
0.9 litre combined fuel consumption was a vision ? now it is a reality originally appeared on Conceptcarz.com on Thu, 21 Feb 2013 09:31:29 EST. Please see our terms for use of feeds.
Source: Concept Carz
Skyhooks, na, DNA, probably2006-05-30 18:40:21 by LSDNA
The skyhook not only has to contend with it's own weight but lateral forces as well. Look at the rings of Saturn. If you take the skyhook concept a little further, you'd have a "skydisk", a record (ok, DVD) with the planet at the center and the edge at geosynch altitude. Such a disk would experience strong shear forces between rings at adjacent altitudes. This shear would apply to a thin radial section of the disk, a sky elevator.
There're other problems but this can develop into a long discussion which I'd rather not get into at this time, but the upshot is that it's not as efficient of a transit system as sci fi or its promoters make it out to be, even if it were technically possible.
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