Robin van Spaandonk wrote:
In reply to Wesley Bruce's message of Sat, 08 Oct 2005 15:19:41
+1000:
Hi,
[snip]
A key to space elevators, solar chimney technologies and big flying jet
stream windmills is *zero weight building materials*. I have a design
for such a material; an expanded foam filled with hydrogen and helium.
Its meant to be Buoyant up to 5 km and ultralight but stiff above that
hight.
IOW it would be buoyant for the first 0.01% of the distance.
Your probably correct. I'll settle for a thousand meters.
That would make it 0.002 %. In short, this measure is useless.
Not quite the bottom few kilometers would need to be alittle stifer than
the rest of the cable. Winds at higher altitudes are not a problem on
the equater but at ground level a few precautions are advisable. For the
other application, solar chimneys 1000 meters will do fine. For
aerospace taking any weight off helps heaps.
Regards,
Robin van Spaandonk
In a town full of candlestick makers,
everyone lives in the light,
In a town full of thieves,
there is only one candle,
and everyone lives in the night.
