As you know, and have been told repeatedly, but seem intent on ignoring, just because the very top end of one launch vehicle's payload range isn't in another vehicle's range doesn't mean all payloads from the first vehicle can't fly on the second.There are many GEO payloads that can fly on Falcon 9. Some of those are currently slated for Proton. If Proton becomes less desirable or unavailable, those payloads could shift to Falcon 9.
Those are going subsynchronous. Falcon 9 v1.1 can only lift maybe 3.5 tonnes to GEO minus 1,500 m/s (so far it has only demonstrated less than 3.2 tonnes).
Last year's ILS Proton payloads weighed between 4.9 and 6.1 tonnes, with an average of more than 5.7 tonnes. All of them were completely out of Falcon 9's range. Falcon 9 is closer to being Soyuz-class than Proton-class.
Quote from: edkyle99 on 04/27/2014 01:15 amThose are going subsynchronous. Falcon 9 v1.1 can only lift maybe 3.5 tonnes to GEO minus 1,500 m/s (so far it has only demonstrated less than 3.2 tonnes). So what kind of GTO (minus what m/s) will it launch the over 5 tonne SES sats to?
Quote from: ChrisWilson68 on 04/26/2014 09:43 pmSpaceX plans to refly a stage next year. Having desperate former Proton customers around might make it easier for them to find customers for early flights of F9 using used stages.is put out of business will Russia want to keep supporting Atlas 5 with engines? - Ed Kyle
SpaceX plans to refly a stage next year. Having desperate former Proton customers around might make it easier for them to find customers for early flights of F9 using used stages.
Quote from: ChrisWilson68 on 04/27/2014 12:49 am Even with cheap Russian engines, Antares seems to be only marginally commercially viable at best.If the U.S. stops U.S. satellites from flying Proton, "commercially viable" changes. But, of course, Antares cannot handle Proton class payloads and neither can Falcon 9 v1.1. - Ed Kyle
Even with cheap Russian engines, Antares seems to be only marginally commercially viable at best.
Quote from: Vultur on 04/27/2014 01:57 amQuote from: edkyle99 on 04/27/2014 01:15 amThose are going subsynchronous. Falcon 9 v1.1 can only lift maybe 3.5 tonnes to GEO minus 1,500 m/s (so far it has only demonstrated less than 3.2 tonnes). So what kind of GTO (minus what m/s) will it launch the over 5 tonne SES sats to?1,800m/s one and more the second.
Quote from: baldusi on 04/27/2014 03:40 amQuote from: Vultur on 04/27/2014 01:57 amQuote from: edkyle99 on 04/27/2014 01:15 amThose are going subsynchronous. Falcon 9 v1.1 can only lift maybe 3.5 tonnes to GEO minus 1,500 m/s (so far it has only demonstrated less than 3.2 tonnes). So what kind of GTO (minus what m/s) will it launch the over 5 tonne SES sats to?1,800m/s one and more the second.Ah, thanks.Interestingly SpaceX website claims 4850 kg to 27 degree GTO for the Falcon 9, but doesn't clarify further that I can see...http://www.spacex.com/about/capabilities
If we're talking this year, shouldn't everyone have a backup launch provider? If so, they can switch to backup?If we're talking about 2 years out, I would think FH would come into the picture and take up the slack.
Those are going subsynchronous. Falcon 9 v1.1 can only lift maybe 3.5 tonnes to GEO minus 1,500 m/s (so far it has only demonstrated less than 3.2 tonnes). Proton M/Briz M can lift more than 6.1 tonnes to this orbital energy, and an upgraded version is increasing that to more than 6.3 tonnes.Here's a list of GTO (GEO-1,500 m/s) capabilities.1. Delta 4 Heavy 11.4 tonnes2. Ariane 5 ECA 10.0 tonnes3. H-2B-304 ~7.0 tonnes4. Atlas 551 6.7 tonnes5. Atlas 541 6.3 tonnes6. Proton M/Briz M 6.1 tonnes7. Zenit 3SL 6.1 tonnes8. Atlas 431 5.8 tonnes 9. Delta 4 5,4 5.8 tonnes10. Delta IV 4,4 5.7 tonnes H-2A-204 ~4.5 tonnes Falcon 9 v1.1 ~3.5 tonnes Soyuz 2.1b/Freg 3.0 tonnes (Kourou)So if the comsats get knocked off Proton, there really is only one non-Russian powered alternative that has a reasonable price. Kourou is going to have to get busy. - Ed Kyle
1. Delta 4 Heavy 11.4 tonnes2. Ariane 5 ECA 10.0 tonnes3. H-2B-304 ~7.0 tonnes4. Atlas 551 6.7 tonnes5. Atlas 541 6.3 tonnes6. Proton M/Briz M 6.1 tonnes7. Zenit 3SL 6.1 tonnes8. Atlas 431 5.8 tonnes 9. Delta 4 5,4 5.8 tonnes10. Delta IV 4,4 5.7 tonnes H-2A-204 ~4.5 tonnes Falcon 9 v1.1 ~3.5 tonnes Soyuz 2.1b/Freg 3.0 tonnes (Kourou)