[amsat-bb] Re: ARRL Sat Article

[Joe Fitzgerald]

Idle-Tyme wrote:
> It might be an "Urban Legend" But I always remember that those early 
> birds antennas were simply made from tape measure like materials.  


That is pretty much state of the art, even now. Take a look at the 
photos of PCSAT at http://wa8lmf.net/bruninga/pcsat.html

You can just make out the inch markings on the yellow tape measure in 
some of the pictures.

-Joe KM1P
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[amsat-bb] Re: ARRL Sat Article

[Glen Zook]

OSCAR VI used the metal from a pocket tape measure for the 10-meter antenna.  
This was folded and was held in this position until the release was activated 
from the ground.  When released, the antenna "deployed", sticking straight out 
from two sides of the satellite.  The QSL cards for receiving OSCAR VI even had 
the "inches" scale showing on the satellite graphics.  This use of "common" 
items was definitely mentioned in the articles about the satellite.

A tape measure is designed to hold straight until "reeled" in and this worked 
beautifully for the satellite.  Not only was it functional, it was VERY 
inexpensive.

Glen, K9STH

Website:  http://k9sth.com


--- On Wed, 12/30/09, Greg D.  wrote:

But a question that has always nagged me...  Perhaps someone on the BB knows 
the answer?
 
I understand that the early Oscars got their ride into space by replacing a 
piece of concrete (or similar dead weight material) with our satellite.  That's 
why they have the shape that they do (looking like a segment of a ring).
 
But what about the antenna?  Was it deployed after launch, or did it ride into 
space already sticking out the side?  An on-orbit deploy would have been 
excessively complicated for that era (it's even difficult today!), but I can't 
see something like that surviving launch intact, either.
 
Anybody know?


  

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[amsat-bb] Re: ARRL Sat Article

[Idle-Tyme]

It might be an "Urban Legend" But I always remember that those early 
birds antennas were simply made from tape measure like materials.  And 
they were simply rolled up when the bird was installed into the rocket.  
Then after launch and the bird was spat out the antennas simply 
"Twanged" out to their extended position.

Joe WB9SBD
*

*The Original Rolling Ball Clock
Idle-Tyme.com *



Greg D. wrote:
>
> Great article!
>
> But a question that has always nagged me...  Perhaps someone on the BB knows 
> the answer?
>
> I understand that the early Oscars got their ride into space by replacing a 
> piece of concrete (or similar dead weight material) with our satellite.  
> That's why they have the shape that they do (looking like a segment of a 
> ring).
>
> But what about the antenna?  Was it deployed after launch, or did it ride 
> into space already sticking out the side?  An on-orbit deploy would have been 
> excessively complicated for that era (it's even difficult today!), but I 
> can't see something like that surviving launch intact, either.
>
> Anybody know?
>
> Greg  KO6TH
>
>
>   
>> Date: Wed, 30 Dec 2009 23:07:25 +
>> From: m5...@yahoo.co.uk
>> To: amsat-bb@amsat.org
>> Subject: [amsat-bb]  ARRL Sat Article
>>
>> http://www.arrl.org/news/features/2009/12/30/11270/?nc=1 
>>
>>
>>
>>   
>>
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[amsat-bb] Re: ARRL Sat Article

[Rich Dailey (Gmail)]

I've heard/read about OSCARs I & II having their antennas deploy after 
separation from
the Agena B, but from all the photos I have seen, it shows a fixed antenna.  
There is
even a photo of an AF specialist installing OSCAR I into the payload bay, and 
this photo shows
the antenna fully deployed. So on these first two satellites, I'm unsure.

OSCAR III had four antennae made of steel rule type material that were 
fan-folded, or otherwise
folded and secured to fit within the assigned area. And Australis OSCAR 5, as 
well as OSCAR 6 used actual
carpenter's rules as antenna material. They were tied back, and self deployed 
when the satellite
was released.

Rich, N8UX


At 11:49 PM 12/30/2009, you wrote:
>I understand that the early Oscars got their ride into space by replacing a 
>piece of concrete (or similar dead weight material) with our satellite.  
>That's why they have the shape that they do (looking like a segment of a ring).
>But what about the antenna?  Was it deployed after launch, or did it ride into 
>space already sticking out the side?  An on-orbit deploy would have been 
>excessively complicated for that era (it's even difficult today!), but I can't 
>see something like that surviving launch intact, either.

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[amsat-bb] Re: ARRL Sat Article

[Greg D.]

Great article!

But a question that has always nagged me...  Perhaps someone on the BB knows 
the answer?

I understand that the early Oscars got their ride into space by replacing a 
piece of concrete (or similar dead weight material) with our satellite.  That's 
why they have the shape that they do (looking like a segment of a ring).

But what about the antenna?  Was it deployed after launch, or did it ride into 
space already sticking out the side?  An on-orbit deploy would have been 
excessively complicated for that era (it's even difficult today!), but I can't 
see something like that surviving launch intact, either.

Anybody know?

Greg  KO6TH


> Date: Wed, 30 Dec 2009 23:07:25 +
> From: m5...@yahoo.co.uk
> To: amsat-bb@amsat.org
> Subject: [amsat-bb]  ARRL Sat Article
> 
> http://www.arrl.org/news/features/2009/12/30/11270/?nc=1 
> 
> 
> 
>   
> 
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