Category Archives: ESAS

The Incredible (Already) Shrinking Moon Program

A few years ago, I asked the question of “how many crew do you really need for a lunar program?”  The conclusion was that if you could reduce the crew requirements (at least initially), it might allow for a much … Continue reading

Posted in ESAS, NASA, Space Transportation | 5 Comments

Quick Notes: Debunking The PLF Volume Argument for HLVs

I noticed during the DIRECT presentation at today’s HSF public meeting, that they were asked why they would need an HLV if they had depots.  Now, I didn’t hear the exact question, since I had a phone call come in … Continue reading

Posted in Commercial Space, ESAS, Launch Vehicles, Lunar Exploration and Development, NASA, Propellant Depots, Space Transportation | 17 Comments

Regarding “Lunar COTS”

I’ve been busy a lot lately (between this, this, this, and having friends in from out of town for the holiday), so I hadn’t had a chance until now to reply to Mark Whittington’s correspondence with me (found here).  A … Continue reading

Posted in Commercial Space, COTS, ESAS, Launch Vehicles, Lunar Commerce, NASA, Space Development, Space Policy, Space Transportation | 22 Comments

More Thoughts on ESAS Appendix Flaws

A few weeks ago, when I first discussed the ESAS Appendices on this blog, I had to be somewhat vague about my concerns, since the information wasn’t out in the public, and I didn’t want to get Chris in trouble … Continue reading

Posted in ESAS | 22 Comments

Reason to Get an NSF L2 Subscription #2921: ESAS Appendices

For those of you who can afford it, but who haven’t done so yet, I’d suggest getting a subscription to the L2 section of Chris Bergin’sNASASpaceflight.com forum. They’ve typically been well ahead of the ball on several of the major … Continue reading

Posted in ESAS, Launch Vehicles, NASA | 17 Comments

Pot-Kettle Comparitive Chromatography

Thus sayeth the esteemed Dr Griffin: Engineers do not deal with “perfect”. Your viewgraphs will always be better than my hardware. A fictional space program will always be faster, better, and cheaper than a real space program. Now…someone remind me … Continue reading

Posted in ESAS, NASA | 3 Comments

CxP Bleg

Does anyone here have solid budget numbers for how much has been spent to-date on the Constellation Program?  Especially Ares-I and Orion?  Just curious.

Posted in ESAS, NASA | 3 Comments

Constellation’s Future? [Updated]

Several recent news items paint an interesting budgetary picture for the future of NASA’s preferred approach for spending tens of billions of dollars to send a few government employees to visit the Moon sometime supposedly starting in 2020. The three … Continue reading

Posted in ESAS, Lunar Exploration and Development, NASA, Space Policy | 5 Comments

Random Thought: Atlas-V Phase 1 + Orion + Prop Transfer

Here’s a quick thought on a way to use EELVs for launching Orion that I was thinking about tonight.   One of the reasons why the CEV is so big that it’s hard to launch on an existing EELV is because … Continue reading

Posted in Commercial Space, ESAS, Launch Vehicles, NASA | 19 Comments

ULA Propellant Depot Paper (Updated)

Here’s one other interesting paper, which was presented at the SPACE 2008 conference a few months ago. As I mentioned in a previous post, I was given a copy of a few of the ULA papers before the conference, but … Continue reading

Posted in Commercial Space, COTS, ESAS, International Space Collaboration, Launch Vehicles, Lunar Commerce, MSS, NASA, Propellant Depots, Space Development, Space Transportation, Technology | 14 Comments