Re: [ERPS] Turnaround Crew

2003-02-14 Thread Michael Wallis
Randall Clague wrote: > I don't see this. A vehicle with a field-swappable TPS can have a > fast turnaround. Unlock the panels, take them off, put the new ones > on, and lock them down. Send the old panels off to the shop for > refurb, or throw them out. Precisely. The original (1987) Alpha d

Re: [ERPS] Turnaround Crew

2003-02-14 Thread David Weinshenker
Randall Clague wrote: > > On Mon, 10 Feb 2003 12:38:13 -0800, Pierce Nichols > <[EMAIL PROTECTED]> wrote: > > >Achieving such a > >turnaround time would also eliminate ablative TPS systems from contention > > I don't see this. A vehicle with a field-swappable TPS can have a > fast turnaround.

Re: [ERPS] Flexible solar cells

2003-02-14 Thread Michael Wallis
David Weinshenker wrote: > Flapping? Wings? I thought we were talking about solar collectors > to be deployed on a vehicle in orbital flight - i.e., in vacuum... Ya ... great big wingie thingies (ok - so they don't flap, much). I still remember seeing the SkyLab 3 crew approaching the station an

Re: [ERPS] musings

2003-02-14 Thread Randall Clague
On Mon, 10 Feb 2003 08:43:58 -0500 (EST), Henry Spencer <[EMAIL PROTECTED]> wrote: >> There is a persistent rumor that TGV, as in TGV Rockets, stands for >> Three Guys in a Van... :-) > >Two Guys in a Van, actually. Pat has been heard to admit this in public, >so it's not just a rumor. :-) OK.

Re: [ERPS] Turnaround Crew

2003-02-14 Thread Randall Clague
On Mon, 10 Feb 2003 12:38:13 -0800, Pierce Nichols <[EMAIL PROTECTED]> wrote: >Achieving such a >turnaround time would also eliminate ablative TPS systems from contention I don't see this. A vehicle with a field-swappable TPS can have a fast turnaround. Unlock the panels, take them off, put th

Re: [ERPS] How to avoid NASA pitfalls.

2003-02-14 Thread Randall Clague
On Mon, 10 Feb 2003 09:15:32 -0500, Alex Fraser <[EMAIL PROTECTED]> wrote: >In the mean time is there a way to send small amounts of money? >Perhaps by Paypal? Yes, [EMAIL PROTECTED], no donation too small. -R -- Every complex, difficult problem has a simple, easy solution - which is wrong

Re: [ERPS] musings

2003-02-14 Thread Randall Clague
On Sun, 09 Feb 2003 12:37:43 -0800, Adrian Tymes <[EMAIL PROTECTED]> wrote: >We already >have a bit more people than we need down there [at MTA] Not many. I have 12 positions identified for an MTA launch, though some of them are dual hatted: Pyro Operator TRACON Liaison Program Manager Range Sa

Re: [ERPS] musings

2003-02-14 Thread Randall Clague
On Sun, 09 Feb 2003 15:50:37 -0500, Alex Fraser <[EMAIL PROTECTED]> wrote: >- No communications network. You could only talk to satellite a couple of times >a week. There are no LEO orbits that don't pass above the comm center's horizon at least once a day. >- Lastly a mental image of so

Re: [ERPS] Flexible solar cells

2003-02-14 Thread David Weinshenker
Michael Wallis wrote: > > Henry Spencer wrote: > > > Especially for a big manned spacecraft -- notoriously high on volume and > > thus heat-generating equipment and people, and low on surface area -- I > > think you're going to be driven to choose the outer layer purely on > > thermal issues. Us

Re: [ERPS] Flexible solar cells

2003-02-14 Thread Michael Wallis
Henry Spencer wrote: > Especially for a big manned spacecraft -- notoriously high on volume and > thus heat-generating equipment and people, and low on surface area -- I > think you're going to be driven to choose the outer layer purely on > thermal issues. Using it for power is appealing, but t

Re: [ERPS] Flexible solar cells

2003-02-14 Thread Henry Spencer
On Fri, 14 Feb 2003, Michael Wallis wrote: > > ...It's better to have separate solar arrays -- which could be > > mechanically rather simpler with a flexible cell material -- and optimize > > the exterior of the station itself for thermal control. > > True, but you want to cover the SOFI to keep i

Re: [ERPS] Flexible solar cells

2003-02-14 Thread Michael Wallis
Henry Spencer wrote: > Careful here. Typically you do not *want* to cover your station etc. in > solar cells, because you will overheat! Solar cells are, by definition, > very good light absorbers. (MOST, the satellite I was involved with, does > use body-mounted solar arrays... but if we were

Re: [ERPS] Flexible solar cells

2003-02-14 Thread Henry Spencer
On Fri, 14 Feb 2003, Michael Wallis wrote: > Came across this and thought it might have interesting possibilities > for use in space. It's a flexable denim-like material that is an 11% > efficient solar cell sheet... There are actually several candidate technologies for mildly-efficient flexible s

[ERPS] Flexible solar cells

2003-02-14 Thread Michael Wallis
Hi ... Came across this and thought it might have interesting possibilities for use in space. It's a flexable denim-like material that is an 11% efficient solar cell sheet. Imagine a shuttle ET covered with this as an orbital station. Imagine a space suit with this as a cover to generate it's ow

Re: [ERPS] Minutes of ERPS #253

2003-02-14 Thread David Weinshenker
Hello, there isn't any specific ERPS plan for tomorrow; I may show up and do one or two flights... this is a local model rocket club launch; we sometimes use these as a venue to fly small electronics tests etc. Launch information: Livermore http://www.lunar.org Fresno http://www.tripolicentra

Re: [ERPS] Minutes of ERPS #253

2003-02-14 Thread spaceman
Hi there! I've been out of the loop for a while, but if you need help for the flight tomorrow, I'm available. At the very least, I would like to get directions to the launch site. I have digital and analog photographic equipment, by the way, so I can help record the flight. Sam Coniglio Hom

[ERPS] Japan and Star wars

2003-02-14 Thread Alex Fraser
Japan plans to cooperate with the US in building a missile defense system. I feel that this cooperation (opinion on good or bad, right or wrong set aside) will affect technology in this country and particularly the technology used in building rockets. I think perhaps the most immediate effect w