[amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt

[Joe]

Yes this does make all the sence in the world,  but why tho can no one 
find true actual data as this IS exactly what's hhappening?

I can find hundreds of pages a of data on the way up  but not one single 
one for data onthe way down,  That I would love to see.

Pete Rowe wrote:

>Hi Joe
>Check out this URL:
>http://www.aerospaceweb.org/question/spacecraft/q0183.shtml
>
>There is a table that shows the speed versus altitude for a shuttle launch. I think the key thing is that while it is in the thick part of the atmosphere ( I believe below 60k feet) the shuttle is going fairly slowly. It doesn't really get going until it is clear of the atmosphere.
>
>I'm just guessing that on the return trip it is still going very fast when it gets to the thick atmosphere and hence, since there is nothing to slow it down except the atmosphere, it gets very hot.
>Does this make sense?
>
>73,
>Pete
>WA6WOA
>
>--- On Sun, 8/9/09, Joe <nss at mwt.net> wrote:
>
>From: Joe <nss at mwt.net>
>Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
>To: G0MRF at aol.com
>Cc: amsat-bb at amsat.org
>Date: Sunday, August 9, 2009, 4:47 PM
>
>Exactly David,
>
>This was my reasoning for trying to get the data I asked for in a 
>earlier message.
>
>I have been asking this for Years and No one EVER has been able to give 
>me this info.
>
>if i was a conspiracy guy i'd be in the boat with the moon landing guys 
>that orbital space travel doesn't happen.  Or at least manned never has 
>happened,
>
>But i'm not.  but i am frustrated that the speed vs altitude at take 
>off  and re entry sseems to be totally un available.
>
>because look at that
>
>at take off we go from zero to 17580 Mph in what 10 minutes or so and 
>are in orbit.
>
>Yet the other way around gouing from 1780 to zero on 45 minutes  causes 
>the fireball effect with the friction.
>
>Why not on the way up?
>
>Thats what i want to be able ro read on the way up when it's at 60K feet 
>it's moving at what speed,  as wellas on the way down also,
>
>and every other possible altitude,
>
>I want to compare speeds at all altitudes.
>
>we can go from zero to 17580 in ten min on the way up with no fireball,  
>but take a slower,  450% slower return rate and it almost fries to a crisp.
>
>Huh?
>
>Joe WB9SBD
>
>G0MRF at aol.com wrote:
>
>  
>
>>
>>Or, the not so 'cube'sat structure is an aerodynamic shape made from a cast 
>>ceramic material which glides in at a shallow angle allowing the energy to 
>>be  dissipated over a much longer period of time.
>>OK the solar cells burn off but an internal antenna would be OK as ceramics 
>>are fairly transparent to RF and a battery would provide the final hour or 
>>so of  tlm. 
>>Would love to see the temp readings as it comes down.
>>Would not love to be on the final end of the trajectory when it  arrives.
>>
>>David   G0MRF
>>
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