# Re: starship-design: FTL travel

```In a message dated 1/22/00 12:04:45 AM Pacific Standard Time,
bfranchuk@jetnet.ab.ca writes:

> Subj:  Re: starship-design: FTL travel
>  Date:    1/22/00 12:04:45 AM Pacific Standard Time
>  From:    bfranchuk@jetnet.ab.ca (Ben Franchuk)
>  Sender:  owner-starship-design@lists.uoregon.edu
>  To:  STAR1SHIP@aol.com, starship-design@lists.uoregon.edu (starship-design@
> lists.uoregon.edu)
>
>  STAR1SHIP@aol.com wrote:
>  >
>  > In a message dated 1/20/00 9:46:11 PM Pacific Standard Time,
>  > bfranchuk@jetnet.ab.ca writes:
>  > >
>  > >  Light is 3E8 meters per second or 300 meters per microsecond.
>  > >  With 1 us for echo return,1 us for radar detection and 1 us for
>  > >  deflection that
>  > >  means a travel speed something about 1/3C.
>  >
>  > echo return time is a function of distance and c only so the pulse out
and
>  > back travels at c period. Not 1/3 c.  velocity=distancetraveled/time so
>  > time=distance traveled times velocity.
>  >
>    True,

checking my math v=d/t so multiplying both sides by t to solve gives vt=d,
dividing both sides by v we get t=d/v so my answer time= distance times
velocity was wrong and so your true becomes false. You should have caught
that.

>but with the delays of echo return from the object,radar
>  processesing
>  and active deflection ( 3 us ) a ship can't be faster than 1/3C or the
>  ship
>  will arive at the object before is deflected. Also with time dilation
>  onboard
>  processing too will be slowed down, as the view point is from space not
>  internal
>  to the ship.

When a object reaches the effective range of the radar it does not need to
wait for a main bang pulse to arrive as they are continuly sent. The echo
races toward the reciever at light speed. The radar is an anolog computer
that takes data from sensors(ear) processes it in real time at light speed to
give output. Zero is the processor time unlike digital processors that take a
long time to process digital data thus the output is not in realtime(now) but
past time(then). Two of your named variable parameters are actually zero not
micro seconds so the max velocity detectable is mass at light speed.

I could be wrong as I was above but request you give a full derivation or
credible source for what you say before I change my mind with new evidence as
it has been thirty years since I managed an electronic warfare laboratory
operators and builders  to succeed in jamming them. Do you know something I
do not know or may have forgotten? It is possible:)

Regards,
Tom

>
>
>  --
>  "We do not inherit our time on this planet from our parents...
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>  "Where a calculator like the ENIAC is equipped with 18,000 vacuum tubes
>  and
>   weighs 30 tons, computers in the future may have only 1,000 vacuum
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>   and weigh only 1 1/2 tons."  Popular Mechanics, March 1949
>
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>  Message-ID: <38896470.755DD48C@jetnet.ab.ca>
>  Date: Sat, 22 Jan 2000 08:04:00 +0000
>  From: Ben Franchuk <bfranchuk@jetnet.ab.ca>
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>          "starship-design@lists.uoregon.edu" <starship-design@lists.uoregon.
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>  Subject: Re: starship-design: FTL travel
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