Ok we have half the numbers, This I also have gotten before a LOT, but coming back down, is no place. I want tosee these numbers.
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 <[email protected]> wrote: > >From: Joe <[email protected]> >Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt >To: [email protected] >Cc: [email protected] >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 > >[email protected] 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 >> >>_______________________________________________ >>Sent via [email protected]. Opinions expressed are those of the author. >>Not an AMSAT-NA member? Join now to support the amateur satellite program! >>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb >> >> >>------------------------------------------------------------------------ >> >> >>No virus found in this incoming message. >>Checked by AVG - www.avg.com >>Version: 8.5.406 / Virus Database: 270.13.48/2292 - Release Date: 08/09/09 >>08:08:00 >> >> >> >> >> >_______________________________________________ >Sent via [email protected]. Opinions expressed are those of the author. >Not an AMSAT-NA member? Join now to support the amateur satellite program! >Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > > > >_______________________________________________ >Sent via [email protected]. Opinions expressed are those of the author. >Not an AMSAT-NA member? Join now to support the amateur satellite program! >Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > >------------------------------------------------------------------------ > > >No virus found in this incoming message. >Checked by AVG - www.avg.com >Version: 8.5.406 / Virus Database: 270.13.49/2293 - Release Date: 08/09/09 >18:10:00 > > > _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
