[ExI] More Tabby's Star news
Robert G Kennedy III, PE
robot at ultimax.com
Sun Aug 7 20:59:44 UTC 2016
On 2016-08-06 16:20, Keith Henson <hkeithhenson at gmail.com> wrote:
> Interesting thoughts. I kind of suspect that nobody can ever do FTL
> spaceflight. It?s a big universe, but if someone had that, they would
> be all over. _
There's a paper coming out in JBIS about that very idea.
> PS. This idea came up back in the late 70s or early 80s when Eric
> Drexler proposed to use a hemesphere of light sails to turn a star
> into a fusion-photon drive.
A Russian named Shkadov proposed a "stellar engine" to do that.
https://en.wikipedia.org/wiki/Stellar_engine
"Stellar engine
From Wikipedia, the free encyclopedia
(Redirected from Shkadov thruster)
"Stellar engines are a class of hypothetical megastructures which use a
star's radiation to create usable energy. Some variants use this energy
to produce thrust, and thus accelerate a star, and anything orbiting it,
in a given direction. The creation of such a system would make its
builders a Type-II civilization on the Kardashev scale.
"There are three variant classes of this idea.
"Class A (Shkadov thruster)
"One of the simplest examples of stellar engine is the Shkadov thruster
(named after Dr. Leonid Mikhailovich Shkadov who first proposed it), or
a Class A stellar engine.[1, from 1987] Such an engine is a stellar
propulsion system, consisting of an enormous mirror/light sail—actually
a massive type of solar statite large enough to classify as a
megastructure, probably by an order of magnitude—which would balance
gravitational attraction towards and radiation pressure away from the
star. "
Some stuff further down in the art about similar concepts in Olaf
Stapledon's fiction from the 1930s.
--
Robert G Kennedy III, PE
www.ultimax.com
1994 AAAS/ASME Congressional Fellow
U.S. House Subcommittee on Space
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