Quote from: abaddon on 05/16/2017 01:30 amQuote from: cppetrie on 05/16/2017 12:59 amWhy not count the dispenser? It's Iridium hardware. Seems to me everything forward of the Payload adapter should be considered payload even if it isn't technically deployed. It was still carried to space.IIRC, SpaceX built it. I disagree with Ed that it should not be counted as payload, at least when considering established lift capability of the rocket, as a different payload could use that mass for something else.You are talking about something that ULA calls "Payload Systems Weight", which is a legitimate way to record things. For Ariane 5 it means including Sylda 5, etc. For other launches it includes the PAF, etc. If you are using that method for Dragon, you would also have to add Dragon's adapter, etc. That's all fine, but I'm interested in deployed payload because that is what matters in the rocket equation. - Ed Kyle
Quote from: cppetrie on 05/16/2017 12:59 amWhy not count the dispenser? It's Iridium hardware. Seems to me everything forward of the Payload adapter should be considered payload even if it isn't technically deployed. It was still carried to space.IIRC, SpaceX built it. I disagree with Ed that it should not be counted as payload, at least when considering established lift capability of the rocket, as a different payload could use that mass for something else.
Why not count the dispenser? It's Iridium hardware. Seems to me everything forward of the Payload adapter should be considered payload even if it isn't technically deployed. It was still carried to space.
- 36000 km/sec seems like an awfully round number. Maybe not a burn to residual shutdown?
Quote from: abaddon on 05/16/2017 01:54 amQuote from: wannamoonbase on 05/16/2017 01:50 amMaybe this was a hardware Block 4 with Block 3 thrust, incremental deployment?Has SpaceX ever said anything about what a "Block 4" would consist of, exactly? We know Block 5 will have uprated thrust, just don't recall them ever saying much of anything about Block 4Agreed, it's not been well explained. I believe that Block 4 is up rated thrust, COPV solution. Block 5 is the reuseability upgrades, new legs, heat shield etc.
Quote from: wannamoonbase on 05/16/2017 01:50 amMaybe this was a hardware Block 4 with Block 3 thrust, incremental deployment?Has SpaceX ever said anything about what a "Block 4" would consist of, exactly? We know Block 5 will have uprated thrust, just don't recall them ever saying much of anything about Block 4
Maybe this was a hardware Block 4 with Block 3 thrust, incremental deployment?
There were two COPV fixes, one short term and one in Block 5. Believe the latter was at request of NASA and maybe USAF.
Quote from: abaddon on 05/16/2017 02:15 amThere were two COPV fixes, one short term and one in Block 5. Believe the latter was at request of NASA and maybe USAF.I thought the NASA request related to long-term fixes for turbo-pump cracking.
Quote from: cppetrie on 05/16/2017 02:25 amQuote from: abaddon on 05/16/2017 02:15 amThere were two COPV fixes, one short term and one in Block 5. Believe the latter was at request of NASA and maybe USAF.I thought the NASA request related to long-term fixes for turbo-pump cracking.NASA tends to have lots of requests.
Gabon AOS.Libreville's not in business for this launch, I guess.
I think there are two different tracking stations in Gabon.The regular Gabon station and the Libreville station. Unless they refer to Libreville as "Gabon".
It could also have been for an abundance of caution in terms of giving information on speeds etc.
Quote from: Next Spaceflight on 05/16/2017 12:12 amSpaceX's heaviest payloads to date. All were launched in 2017.1. Iridium Next (1-10) - LEO (9,600 kg)2. Inmarsat-5 F4 - GTO (6,070 kg)3. EchoStar 23 - GTO (5,600 kg)Dont forget about the Dragon launches. Those will be right in there near #1
SpaceX's heaviest payloads to date. All were launched in 2017.1. Iridium Next (1-10) - LEO (9,600 kg)2. Inmarsat-5 F4 - GTO (6,070 kg)3. EchoStar 23 - GTO (5,600 kg)
If the plume pushed against the 1st stage would the intial aceleration be larger than straight into vaccum?
Quote from: stcks on 05/16/2017 12:30 amQuote from: Next Spaceflight on 05/16/2017 12:12 amSpaceX's heaviest payloads to date. All were launched in 2017.1. Iridium Next (1-10) - LEO (9,600 kg)2. Inmarsat-5 F4 - GTO (6,070 kg)3. EchoStar 23 - GTO (5,600 kg)Dont forget about the Dragon launches. Those will be right in there near #1Those are LEO launches. For LEO, ~10 tons is not much - it's only about half of what F9 can do.