• Re: NASA fast-tracks nuclear-powered spaceship, aims for interplanetary travel

    From Steve Silverwood [KB6OJS]@steve.silverwood@gmail.com to rec.aviation.military on Fri Apr 17 13:19:56 2026
    From Newsgroup: rec.aviation.military

    On Thu, 16 Apr 2026 13:21:39 -0400, "Jim Wilkins"
    <muratlanne@gmail.com> wrote:

    "a425couple" wrote in message news:JZ7ER.26693$d5bf.23463@fx07.iad...

    It isnAt the first time the U.S. has considered nuclear power in space.
    The NERVA program, Nuclear Engine for Rocket Vehicle Applications, was >designed and tested in the 1960s.

    There may be videos of this on YouTube or something, but I remember
    they tested this with conventional explosives on a small model, and it
    really worked.

    OK, found a playlist of 17 clips on YouTube about NERVA:

    https://www.youtube.com/watch?v=j6gKFvPjGpQ&list=PL84b1TR9XxFntht_kErePdrUj-kQDrpgB&pp=0gcJCbcEOCosWNin

    Took some doing to refine the search because there's a biotech company
    called Nerva that was constantly cropping up....

    I built a laboratory demonstration model of a spacecraft communications >laser design on my home shop metal lathe and milling machine which were made >in the 1960's and still can do precise work.

    Yeah, laser communications are being used actively by the military. An infra-red laser beam can be modulated for communication between two
    units on the ground. Even works full duplex (like a phone) if you
    have both a transmitter and receiver operating concurrently at both
    sites. Totally undetectable by anyone trying to monitor your
    communications, but depends completely on "clear air" between the two
    locations -- dust or other obstructions would cause partial or total communications loss.

    Obviously, in the airless environment of space this isn't a problem.
    For maintaining constant communications, line of sight of course,
    between two locations on the Moon would be a piece of cake. Might be
    handy for monitoring a remote operation like a nuclear power source or
    a remote sensor suite for whatever research purpose, and getting
    real-time data back to the base camp location.

    That also works for high-bandwidth communications between spacecraft,
    or ground to orbit comms, providing a clear line of sight along with
    tracking systems that keep the beams aimed where they need to go.

    I've heard of ham radio operators fiddling around with this from time
    to time, and I =think= there have been articles about it in QST, the
    magazine of the American Radio Relay League (the US national
    organization for amateur radio operators), and probably QEX (another
    ARRL publication for experimenters). Might be worth a search or two,
    or a message to their technical division via the https://arrl.org
    website.
    --
    //Steve//
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  • From Jim Wilkins@muratlanne@gmail.com to rec.aviation.military on Fri Apr 17 16:45:07 2026
    From Newsgroup: rec.aviation.military

    "Steve Silverwood [KB6OJS]" wrote in message news:r245uk57f5fnd5v5o8rt2qfgv20vrtarg3@4ax.com...

    On Thu, 16 Apr 2026 13:21:39 -0400, "Jim Wilkins"
    <muratlanne@gmail.com> wrote:

    ...spacecraft communications laser ...

    That also works for high-bandwidth communications between spacecraft,
    or ground to orbit comms, providing a clear line of sight along with
    tracking systems that keep the beams aimed where they need to go. --------------------------
    It was proposed to link future TDRSS satellites, and possibly Iridium.
    Artemis II used a laser comm link to transmit HDTV back to Earth. The
    project ended for me when the Ph.D. found more support elsewhere.

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  • From Steve Silverwood [KB6OJS]@steve.silverwood@gmail.com to rec.aviation.military on Thu Apr 23 15:45:50 2026
    From Newsgroup: rec.aviation.military

    On Fri, 17 Apr 2026 16:45:07 -0400, "Jim Wilkins"
    <muratlanne@gmail.com> wrote:

    ...spacecraft communications laser ...

    ...
    It was proposed to link future TDRSS satellites, and possibly Iridium. >Artemis II used a laser comm link to transmit HDTV back to Earth. The >project ended for me when the Ph.D. found more support elsewhere.

    That makes perfect sense. I'd be surprised if Starlink hasn't also
    considered something like that for their up- and down-links, and
    between satellites in their constellation.

    I remember hearing about Artemis using the laser for the video link
    between the spacecraft and Mission Control. Good for them, bad for us
    hams and shortwave listeners, some of whom like to listen to that
    stuff real-time, because it takes radio out of the loop. :)
    --
    //Steve//
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