Hola Terry et al!
I keep re-reading this thread in utter disbelief that lift could be so
simple and just a matter of new materials like the superstrong carbon
nanotubes and buckyballs. Took some notes today during lunch about these
vacuum balloons;
1) its after all a buoyancy compensator like we use in diving to keep
us at one level or adjust to whatever level you need in the water since
everything 'gravitates' to its own level
2) would need a rigid, super light weight structure that would not
collapse due to the internal vacuum
3) possibly a carbon nanotube support frame with rigid buckyball panels
similar in form to the almost geodesic ship used in the 1958 Jules Verne
movie, 'From the Earth to the Moon', the panels would be on the outside
so they would tend to be pulled inward by the vacuum, but would not
collapse
4) possibly a foam with evacuated bubbles, made with a chemical or heat
process that would expand the initial gas in the bubble and when it
cooled or was treated with a chemical, the membrane of the foam bubble
would be essentially a DIODE, allowing for the outflow of air, then when
it is rapidly cooled, would locking the membrane behind it so no air
could return...I hereby dub this alien technology....Maxwells Demon Foam
(MDF)...<LOL>...
5) buckyball or carbon nanotubes which could be voided and prevent
reentry of the escaped air, really any shape that could be imagined
could be made using this material
Now that Maxwell Demon material might be useful in MANY WAYS...serving
as a diode to bias the direction of flow of whatever as it does in
electrical current and of course checkvalves for water/gas under
pressure, in the case of the vacuum balloons, we want the total
expulsion of all air to form a vacuum of varying 'vacuity'
Heat would cause the air in such a MFD enclosed structure to expand and
ooze outward through the membrane, rapid cooling would cause the
material pores to close and lock to hold the vacuum by preventing any
air from re-entering...yeah, thats the trick!
I think there are thus 3 keys to the practical implementation of vacuum
balloons...
1) super lightweight
2) structural strength that would not collapse due to the vacuum
3) MDF as the general checkvalve/diode material to allow the gas to exit
but not re-enter
Such a MFD material would be invaluable and thats my thought for THIS
day on this idea.
T. Bastian wrote:
I have for a long time tried to come up with a way to create an area of
total pneumatic vacuum so I could make it lift an object.. Especially in
an electrical or acoustic fashion.. But this seems very promising.. Just
think the C-5 cargo aircraft creates an about 2.5 psi difference
(Bernoulli's principal) between the top of the wing and the bottom, to
get off the ground... Yea yea yea, Newtons action reaction also comes
into play after the aircraft gets off the ground.. but that's not the
point... But the C-17 cargo plane can land and take off in a shorter
distance than the C-5, but its no surprise since it only needs to
develop just over 1 psi upper/lower difference.. So to get a 14.7psi or
so... WOW! what a lifting force... As long as the container or object
doesn't weigh a bazillion tons and nullify it....
Terry Bastian
--
Jerry Decker - http://www.keelynet.com
Donations to support KeelyNet: http://www.keelynet.com/donate1.htm
Public Archive http://www.escribe.com/science/keelynet
Order out of Chaos - From an Art to a Science
