Clearly, Starship has changed the game.
Quote from: Paul451 on 08/19/2021 07:24 am Clearly, Starship has changed the game.Counting chickens before they hatch
They may be right, starship may fail, but even falcon 9 is eating SMART's lunch. By the time that starship has definitely failed or succeeded it will be too late to change course.
Was looking at it as not failing, but Starship doesn't do much better than Falcon 9. Just the cheapest method for launching large payloads
....quotes from others snipped........Not likely to be cheaper to have a totally different rocket with smaller payload. Smaller rockets have worse $/kg in general. An exceptional example: Pegasus costs like $35-40 million for half a ton to orbit. RTLS F9 would cost about the same (perhaps less) but should get over 10 times that much to orbit.With this graded reuse strategy, SpaceX can launch basically 40 launches per year with the same platform without having to greatly expand production from where they are right now. Falcon Heavy for the largest payloads, but F9 RTLS for the smallest. That's a very efficient strategy, not too dissimilar to ULA's dial-a-rocket approach but usable for far smaller (read: lowest cost) payloads and with only having to deal with 1 propellant combination instead of 3 for ULA (solids, kerolox, hydrolox).
The bottom line.Reuse if implemented correctly is highly economically successful. End result is more business even though at lower per launch prices results in a larger total revenue and profit stream. Because more payloads start showing up. 5 years after reuse got going full swing, more inexpensive low budget payloads were developed and are now flooding the launch market. Last year US did 45 launches. This year it could be >60. Globally last year the total was 135 successful launches. Up >50% from the numbers in 2016 (83 successful launches [Gunter's Space Page 2016 year of launches list]). This year could reach >150. The payloads are mostly conglomerations of small sats both large number constellations and unique one and two's. Lower the cost of access to space and the number of payloads will increase. Launch supply for cheap launches is almost falling behind demand.
Quote from: LouScheffer on 08/20/2021 12:48 amQuote from: Jim on 08/20/2021 12:16 am Atlas V, Delta IV and Vulcan all use the same avionics.Be careful what you wish for. Same avionics does not necessarily mean you inherit the same successful heritage.Ariane 5 thought they would decrease risk by using EXACTLY the heritage avionics and software that was used on the Ariane 4. Instead it doomed the mission, as the different trajectory caused numbers to overflow.They used the same software, different avionics. Didn't handle the higher resolution of the new hardware graciously. Here we mean avionics, as in whole boxes.
Quote from: Jim on 08/20/2021 12:16 am Atlas V, Delta IV and Vulcan all use the same avionics.Be careful what you wish for. Same avionics does not necessarily mean you inherit the same successful heritage.Ariane 5 thought they would decrease risk by using EXACTLY the heritage avionics and software that was used on the Ariane 4. Instead it doomed the mission, as the different trajectory caused numbers to overflow.
Atlas V, Delta IV and Vulcan all use the same avionics.
Atlas V, Detla IV and Vulcan all use the same avionics.
The bottom line.Reuse if implemented correctly is highly economically successful. Globally last year the total was 135 successful launches. Up >50% from the numbers in 2016 (83 successful launches [Gunter's Space Page 2016 year of launches list]).
Quote from: oldAtlas_Eguy on 01/22/2022 05:03 pmThe bottom line.Reuse if implemented correctly is highly economically successful. Globally last year the total was 135 successful launches. Up >50% from the numbers in 2016 (83 successful launches [Gunter's Space Page 2016 year of launches list]). 91 of 2021's successes were performed by just three launch vehicle families: CZ (DF-5 based), Falcon 9, and R-7. Only 29 of those flights provided successful first stage recoveries (defined as returning a usable first stage). The truth is that China's all-expendable program has been responsible for much of the growth in launch numbers recently, building whatever "space environmental sensing" network they are building up there. - Ed Kyle
Quote from: Jim on 08/20/2021 12:16 amAtlas V, Detla IV and Vulcan all use the same avionics.Is this still true? Honeywell build the inertial navigation and control for Atlas, and the rate gyros for stabilization, but L3 will build the avionics for Vulcan.Now maybe this is just a change of general contractor for avionics, and L3 will continue to purchase the inertial nav units from Honeywell, but that seems odd since L3 makes their own inertial navigation units (though maybe not space based ones). On the other hand, purchasing items from a competitor happens already in the ULA supply chain.
Well, it looks like SpaceX proved out the business case. Especially launching Starlink. Even without Starlink, F9 has over 100 landings and have reused several rockets 10 times. This drastically lowers cost for SpaceX the more times they can launch a rocket.
Quote from: spacenut on 01/23/2022 01:35 pmWell, it looks like SpaceX proved out the business case. Especially launching Starlink. Even without Starlink, F9 has over 100 landings and have reused several rockets 10 times. This drastically lowers cost for SpaceX the more times they can launch a rocket. Some stats:Delta IV had flown 41 times, a total of 65 cores with the 12 DIV Heavy flights. Atlas V has flown a total of 91 times.Falcon 9 in its various iterations has flown 137 times plus 3 Falcon Heavies for a total of 140 flights more than the combined total of both of ULA's 2 active rockets.Most importantly related to reuse with 103 successful landings and 81 reflights SpaceX has recovered more cores than Atlas Vs ever built and conducted significantly more reflights than Delta IV cores have ever flown.We are quickly approaching a point in time where there will be more reflight history on one launch vehicle family than the total flight history of another 2 rocket families made by the company trying to throw cold water on the reuse business case.
Quote from: GWH on 01/23/2022 08:59 pmQuote from: spacenut on 01/23/2022 01:35 pmWell, it looks like SpaceX proved out the business case. Especially launching Starlink. Even without Starlink, F9 has over 100 landings and have reused several rockets 10 times. This drastically lowers cost for SpaceX the more times they can launch a rocket. Some stats:Delta IV had flown 41 times, a total of 65 cores with the 12 DIV Heavy flights. Atlas V has flown a total of 91 times.Falcon 9 in its various iterations has flown 137 times plus 3 Falcon Heavies for a total of 140 flights more than the combined total of both of ULA's 2 active rockets.Most importantly related to reuse with 103 successful landings and 81 reflights SpaceX has recovered more cores than Atlas Vs ever built and conducted significantly more reflights than Delta IV cores have ever flown.We are quickly approaching a point in time where there will be more reflight history on one launch vehicle family than the total flight history of another 2 rocket families made by the company trying to throw cold water on the reuse business case.You forget one stat: the total number of Falcon 9 cores ever built. Counting those that haven't flown yet, we have seen 72 numbered cores so far. A number of them were structural test articles or were not launched for other reasons, and a couple haven't flown yet. There have been roughly the same number of Falcon cores built as Delta IV cores. Fewer than the Atlas cores.