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« Puffer Orbits | Main | New Wave Spaceship Update »

2006 May 11

Greyships & Spacefillers
2c/3 perpendicular signals through 'stripes'

2006-04-24-2c3-agar-signal.rle
extensible signal that moves at
speed 2c/3 through 'stripes' agar,
at right angles to the stripes
Hartmut Holzwart, 24 April 2006
Hartmut Holzwart and Jason Summers have been looking at signals that can propagate through an infinite medium consisting of alternating ON and OFF stripes (the same agar as in the interior of standard greyships).

It was shown in 1993 that signals travelling parallel to the striped medium must move at the speed of light -- but it turns out that non-destructive signals perpendicular to the stripes are also possible, and these follow different rules. In particular, they can move at a speed of 2c/3 orthogonally, slower than lightspeed but faster than a spaceship can travel through vacuum.

2006-05-09-2c3-extend-signal.rle
extensible symmetric 2c/3 orthogonal
signal in 'stripes' medium
Hartmut Holzwart, 9 May 2006

2006-05-09-2c3-agar-signal.rle
small symmetric 2c/3 orthogonal
signal in 'stripes' medium
Hartmut Holzwart, 9 May 2006

2006-04-15-2c3-agar-signal.rle
minimal 2c/3 stripe-crossing signal
in 'stripes' agar, based on
Hartmut Holzwart's larger original
Jason Summers, 15 Apr 2006

2006-05-02-2c3-agar-signals.rle
two short wide 2c/3 signals
Hartmut Holzwart, 2 May 2006

2006-04-28-2c3-agar-signal.rle
small 2c/3 signal in 'stripes' agar
Hartmut Holzwart, 28 Apr 2006

2006-04-26-2c3-agar-signal.rle
small symmetric 2c/3 signal
perpendicular to striped medium
Hartmut Holzwart, 26 April 2006

2006-04-26-pseudospacefiller.rle
unfinishable spacefiller fragment with a higher growth rate
than is attainable in vacuum
Hartmut Holzwart, 26 April 2006