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1 Oct 2024 13:16:37 EDT (-0400)
  Solar Sail (Message 21 to 30 of 42)  
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From: Chris Huff
Subject: Re: Solar Sail
Date: 4 Sep 2000 19:02:38
Message: <chrishuff-61D293.18041904092000@news.povray.org>
In article <39B40FF7.5EAD3DC8@istar.ca>, sde### [at] istarca wrote:

> Yeah.. I figured that Simon would already be taken, so I went with my old 
> IRC name [1].
> [1] Stands for 'NotLikeTea' [2]

I remember seeing you on #povray...have you been there lately? I drop by 
every once in a while...

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

<><


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From: SomeGuy
Subject: Re: Solar Sail
Date: 4 Sep 2000 19:27:48
Message: <39B2EFD0.6ED8E3F7@earthlink.net>
Looks Deadly... O)
If umbrellas could kill...?

Simon de Vet wrote:

> Something I've been working on for the last few days.
>
> It was originally inspired by the tropical lionfish, then by insects,
> and now I've been told it looks like an umbrella. Ah well...
>
> The cylindrical hull is just a junk object, to give a sense of the size
> of the final hull. Most of the model is untextured.
>
> Suggestions?
>
> Simon
>
>   ------------------------------------------------------------------------
>  [Image]  [Image]  [Image]


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From: GrimDude
Subject: Re: Solar Sail
Date: 4 Sep 2000 20:43:30
Message: <39b441b2@news.povray.org>
Wonderful work, sir. I think of pearl-like wings/sails, when I contemplate
the solar wind.

Fine handywork.

Grim
"Simon de Vet" <sde### [at] istarca> wrote in message
news:39B323A3.7548E644@istar.ca...
> Suggestions?
>
>
> Simon


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From: H  E  Day
Subject: Re: Solar Sail
Date: 4 Sep 2000 23:51:58
Message: <01c016ec$86fb8f60$307889d0@daysix>
I'll show It when It's done!
No peekies!

H.E. Day
<><


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From: Mark Wagner
Subject: Re: Solar Sail
Date: 5 Sep 2000 02:08:54
Message: <39b48df6@news.povray.org>
Simon de Vet wrote in message <39B40FF7.5EAD3DC8@istar.ca>...
>[1] Stands for 'NotLikeTea' [2]
>[2] Bonus points if anyone gets the reference.


From "The Hitchhiker's Guide to the Galaxy", referring to a device that
invariably produces a beverage almost, but not quite, entirely unlike tea.


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From: Greg M  Johnson
Subject: Re: Solar Sail
Date: 5 Sep 2000 10:34:03
Message: <39B50323.B2609184@my-dejanews.com>
The level of detail is impressive.
It provides inspiration for my work, in that my stuff often looks crappier
because I don't give it enough detail to look like a real "thing."

Simon de Vet wrote:

> Something I've been working on for the last few days.
>
> It was originally inspired by the tropical lionfish, then by insects,
> and now I've been told it looks like an umbrella. Ah well...
>
> The cylindrical hull is just a junk object, to give a sense of the size
> of the final hull. Most of the model is untextured.
>
> Suggestions?
>
> Simon
>
>   ------------------------------------------------------------------------
>  [Image]  [Image]  [Image]


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From: Greg M  Johnson
Subject: Re: Solar Sail
Date: 5 Sep 2000 10:45:53
Message: <39B505EB.A044D6F0@my-dejanews.com>
Simon de Vet wrote:

> Anyone have steering ideas?

Holes in each sail that open or close like a shutter.  If one wants to turn, close or
open shutters on one side or another, to provide differential thrust.


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From: Tom Melly
Subject: Re: Solar Sail
Date: 5 Sep 2000 10:55:54
Message: <39b5097a$1@news.povray.org>
"Simon de Vet" <sde### [at] istarca> wrote in message
news:39B3AF73.66532F1F@istar.ca...
>
>
> Anyone have steering ideas?
>

Well, the obvious suggestions have been made. Of course, they are likely to
be very slow.

A bit faster, and could be done by muscle-power or solar-power, would be to
turn it by rotating a heavy vertical shaft inside the ship for "left" and
"right" and a horizontal shaft for "up" and "down". The ship would then
orientate itself in the opposite direction to the one you were turning. Of
course, the sails might crumple a bit during turning depending on various
factors. This could be alleviated by combining it with one of the more
conventional methods, which would keep the sails filled during the turning.

Did that make sense?


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From: Steve
Subject: Re: Solar Sail
Date: 5 Sep 2000 14:22:03
Message: <slrn8r9ues.ebf.steve@zero-pps.localdomain>
On Sun, 03 Sep 2000 17:41:55 -0700, SomeGuy wrote:
>Looks Deadly... O)
>If umbrellas could kill...?
>

IIRC in the 80s there was a Bulgarian diplomat who got killed
(or was it him doing the killing), in London with a poison tipped
umbrella.


-- 
Cheers
Steve              email mailto:ste### [at] zeroppsuklinuxnet

%HAV-A-NICEDAY Error not enough coffee  0 pps. 

web http://www.zeropps.uklinux.net/

or  http://start.at/zero-pps

  2:20pm  up 14 days, 18:38,  2 users,  load average: 1.08, 1.02, 1.01


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From: Jamie Davison
Subject: Re: Solar Sail
Date: 5 Sep 2000 14:22:55
Message: <MPG.141e35b960a36cdc9897b5@news.povray.org>
On Mon, 04 Sep 2000 11:19:31 -0300, Simon de Vet wrote...
> Anyone have steering ideas?

Erm, Solar sails aren't really massively steerable, unless you can find 
another source of light pressure to fly away from.  So you fly from star 
to star, hoping to god that you get your exit vector right in order to 
get to the next one...

Not strictly relevant, but IIRC Larry Niven used light sails to get 
bussard ramships up to sufficient speed for their ramscoops to start 
functioning efficiently in his Known Space stories.

I suppose you could use *big* lateral steering motors to give you some 
fine control over direction of travel, but doing a u-turn is none too 
practical, or even possible.

Whoops, starting to waffle, and besides I need to go to bed since I start 
my new job on the morrow (Which means this won't be sent until Tuesday 
evening, despite being written Monday evening)

Bye for now,
     Jamie.


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