Google backs private Moon landing, Google is offering a $30m prize pot to private firms that land a |
Google backs private Moon landing, Google is offering a $30m prize pot to private firms that land a |
 Sep 14 2007, 08:02 AM
Post
#1
|
|
 Junior Member  Group: Members Posts: 99 Joined: 11-October 04 From: Oxford, UK (Glasgow by birth) Member No.: 101  |
FROM: http://news.bbc.co.uk/1/hi/technology/6993373.stm
Firms interested in trying for the prize have until the end of 2012 to mount their Moonshot Anyone fancy a crack at this? Cheers Brian -------------------- "There are 10 types of people in the world - those who understand binary code, and those who don't."
|
 |
 
|
 |
|
Sep 14 2007, 05:23 PM
Post
#2
|
|
 Senior Member Group: Moderator Posts: 6474 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Yeah; I was wondering about opportune piggybacks as well. Also, how many commercial GEO launches are using kick motors (Star-48s, etc.) these days to get there from LEO? Most of the gov ones I know use Hall Effect xenon thrusters, which takes a lot of time & obviously does not impart much dV per sec.
Reason I ask is that the optimum separation time would presumably be after a nice, decisive boost to GEO...but it would have to be well-timed with the primary SV's needs, of course. Can't have the main sat spending station-keeping fuel to traverse 120 deg of longitude or something to get it where it needs to be. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
|
|
|
|
|
Sep 28 2007, 12:35 PM
Post
#3
|
|
 Member Group: Members Posts: 321 Joined: 6-April 06 From: Cape Canaveral Member No.: 734 |
QUOTE (nprev @ Sep 14 2007, 01:23 PM)  Yeah; I was wondering about opportune piggybacks as well. Also, how many commercial GEO launches are using kick motors (Star-48s, etc.) these days to get there from LEO? Most of the gov ones I know use Hall Effect xenon thrusters, which takes a lot of time & obviously does not impart much dV per sec. Hall Effect xenon thrusters are only used for station keeping and not perigee raising. Kick motors for GTO only exist on Delta II's. Atlas, Delta IV, Proton and Ariane have all liquid upperstages. The last commercial Delta II GTO mission was in 1998. Perigee kick motors have been long gone, liquid systems are used since they are: 1. more efficient 2. left over prop can be used for station keeping 3. more flexible |
|
|
|
|
Dec 4 2007, 03:59 AM
Post
#4
|
|
|
Senior Member Group: Moderator Posts: 6474 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
QUOTE (Jim from NSF.com @ Sep 28 2007, 04:35 AM) Hall Effect xenon thrusters are only used for station keeping and not perigee raising. Advanced EHF SVs are actually going to use their HETs for perigee raising, and station keeping thereafter...105 days of continuous thrust to reach GEO from LEO. (Yeah, I know what you're thinking; I was initially incredulous as well. Trade-off seems to be that a bit more vehicle mass budget outweighs time to get there, given that modern spacecraft have pretty long lifetimes.) -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
|
|
|
|
SkyeLab Google backs private Moon landing Sep 14 2007, 08:02 AM
djellison I can understand how and my why the first X-Prize ... Sep 14 2007, 09:57 AM
Paolo Amoroso QUOTE (djellison @ Sep 14 2007, 11:57 AM)... Sep 14 2007, 10:51 AM
mcaplinger QUOTE (Paolo Amoroso @ Sep 14 2007, 03:51... Sep 14 2007, 01:39 PM JRehling QUOTE (djellison @ Sep 14 2007, 02:57 AM)... Sep 14 2007, 06:42 PM SkyeLab I thought this was an interesting add on (from the... Sep 14 2007, 12:38 PM djellison QUOTE (SkyeLab @ Sep 14 2007, 01:38 PM) D... Sep 14 2007, 01:00 PM SpaceListener QUOTE (djellison @ Sep 14 2007, 08:00 AM)... Sep 14 2007, 02:09 PM Toma B QUOTE (SkyeLab @ Sep 14 2007, 02:38 PM) .... Sep 14 2007, 01:03 PM SkyeLab How about the Planetary Society?
Emily? Sep 14 2007, 01:15 PM djellison http://www.spacetethers.com/massfraction.html
VER... Sep 14 2007, 01:19 PM AndyG On paper it's a bit better than a cubesat.
If... Sep 14 2007, 01:25 PM djellison QUOTE (AndyG @ Sep 14 2007, 02:25 PM) dry... Sep 14 2007, 02:01 PM djellison I didn't know Kaguya had it onboard - hopefull... Sep 14 2007, 02:15 PM mcaplinger QUOTE (djellison @ Sep 14 2007, 07:15 AM)... Sep 14 2007, 03:21 PM nprev This Google prize is getting a LOT of media attent... Sep 14 2007, 02:57 PM Paolo Amoroso QUOTE (nprev @ Sep 14 2007, 04:57 PM) Not... Sep 14 2007, 03:46 PM AndyG QUOTE (nprev @ Sep 14 2007, 03:57 PM) EDI... Sep 14 2007, 03:49 PM dvandorn QUOTE (AndyG @ Sep 14 2007, 10:49 AM) Wou... Sep 14 2007, 05:08 PM climber QUOTE (dvandorn @ Sep 14 2007, 07:08 PM) ... Sep 17 2007, 05:18 PM marsbug What about the five million dollar secound prize? ... Sep 14 2007, 03:43 PM AscendingNode So google will give $20 million to the first ... Sep 14 2007, 04:22 PM djellison Thinking out loud - if you can get to GEO as a pig... Sep 14 2007, 05:14 PM Phil Stooke Well, the artifacts need not be Apollo - they coul... Sep 14 2007, 05:24 PM nprev The Google link that AscendingNode posted had a pr... Sep 14 2007, 05:32 PM nprev Beginning to wonder if they're just trying to ... Sep 15 2007, 01:49 AM dvandorn I think it's worth pointing out, here, that Go... Sep 15 2007, 05:22 AM tuvas Something else that no one has said about Google b... Sep 15 2007, 01:48 PM tuvas Oh, just to talk a little about the Apollo landing... Sep 15 2007, 01:49 PM djellison QUOTE (tuvas @ Sep 15 2007, 02:49 PM) Apo... Sep 15 2007, 02:03 PM tuvas QUOTE (djellison @ Sep 15 2007, 07:03 AM)... Sep 20 2007, 03:30 AM ugordan My thoughts exactly there, Doug. It's pointles... Sep 15 2007, 02:26 PM nprev Believe it or not, I used to work with a contracto... Sep 16 2007, 01:12 AM Stu This week's "Carnival of Space" has ... Sep 20 2007, 04:13 PM Del Palmer Looks like the cringemaster wants a piece of the a... Sep 28 2007, 11:26 AM djellison Nahh - we're doing balloons
Doug Sep 28 2007, 11:40 AM cndwrld I was at the International Aeronautical Congress c... Oct 1 2007, 11:44 AM Moon Saloon QUOTE (cndwrld @ Oct 1 2007, 03:44 AM) It... Dec 3 2007, 04:03 AM |
|
Lo-Fi Version | Time is now: 18th May 2013 - 09:28 AM |
|
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here. |
|
