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Pastimes : Let's Talk About Our Feelings!!! -- Ignore unavailable to you. Want to Upgrade?

To: Father Terrence who wrote (47227)	7/26/1999 2:18:00 PM
From: Jacques Chitte	Read Replies (1) \| Respond to of 108807

The NERVA wasn't pulse. It was steady-state; hydrogen pumped through a hot fission core and exhausted as a classic rocket jet. It promised an Isp of maybe 900 sec; compare with a "best chemical Isp " of 450 (mmmmaybe as good as 480) sec for a hydroxygen system. The advantage of a NERVA was high thrust and high thrust fraction. The downside is of course the need for heavy shielding if manned vehicles are designed.

To: Father Terrence who wrote (47227)	7/26/1999 2:38:00 PM
From: Krowbar	Read Replies (1) \| Respond to of 108807

I don't think that I hold Luddite views. I am in favor of space exploration, as well as continuing to increase our technological knowledge. Exploring space has nothing to do with CO2 warming. Most people are going to continue living on Earth, not abandoning it after it is trashed. There are problems with collecting energy from the sun with space based solar farms and beaming that energy to earth. It is a lot different than the small scale solar generation on the space station. Del