Re: How Rockets Differ From Jets

George Evans;
>I still think the weight savings will be nearly cancelled by the increased
>structural elements needed to prevent collapse.
Micro-balloons or perhaps milli-balloons will NOT so easily collapse,
as for one thing they can safely contain almost any gas/element (at
good pressure if need be) that you can think of, of anything from Rn to
H2, thus otherwise having a vacuum within isn't anything but a viable
notion of enclosing the fewest possible atoms per balloon in order to
obtain the greatest possible buoyancy that'll matter the most for the
terrestrial applications. Once in orbit the amount of buoyancy isn't
much of a factor, other than for stoping thermal transfers of
conduction as well as blocking radiant mode transfers, of which you
can't accomplish either with your carbon nor CNT composites.

A basalt composite can even become bonded with itself, which would
likely happen upon the extreme velocity of exiting the atmosphere or
most likely upon reentry if the outer tiles or sprayed on ceramic
coatings in some way failed. Although, due to the rather terrific
R-Factor of the basalt composites of fibers and those low density
balloons situated between the outter and inner shell, it'll take a
little time before burn-through. At least I'm thinking of 100 mm worth
of such structural insulation that'll take a great deal of punishment
before losing the entire farm, whereas I'm shure that you're thinking
about using at most 10 mm which might not be sufficient, nor wise.

>Is there some reason for coating inside surfaces with ceramic?
This is a good argument, whereas apparently "tomcat" is insisting upon
the capability of roasting the interior to a fairlywell, and then
perhaps robotically recovering his spaceplane once all onboard are
fried beyond charcoal. Therefore I agree that the use of Titanium over
Aluminum for the interior isn't warranted unless there's some extreme
stress related zone that's combined along with some degree of heat, in
which case the Titanium alloy seems likely to being best suited.
Although, wherever aluminum can be utilized is also where the basalt
composites or even those Carbon and CNT composites can often be
utilized at nearly half the weight.
~

Kurt Vonnegut would have to agree; WAR is WAR, thus "in war there are
no rules" - In fact, war has been the very reason of having to deal
with the likes of others that haven't been playing by whatever rules,
such as GW Bush.
Life upon Venus, a township w/Bridge & ET/UFO Park-n-Ride Tarmac:
http://guthvenus.tripod.com/gv-town.htm
The Russian/China LSE-CM/ISS (Lunar Space Elevator)
http://guthvenus.tripod.com/lunar-space-elevator.htm
Venus ETs, plus the updated sub-topics; Brad Guth / GASA-IEIS
http://guthvenus.tripod.com/gv-topics.htm

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