Earlier quoted context omitted.
>The planned Ariane 6 is cost uncompetitive with the Falcon 9 This isn't really true. Ariane 6 is expected to cost €75 million for 5 tonnes to GTO and €90 million for 11.5 tonnes. Falcon 9 costs $50 million for 5.5 tonnes to GTO (reusable) and $62 million for 8.3 tonnes (expendable). Because Ariane uses a "dual-berth" conops, it (generally) flies two payloads per launch, whereas Falcon 9's excess capacity is usually…
> Ariane 6 is expected to cost €75 million for 5 tonnes to GTO and €90 million for 11.5 tonnes. Falcon 9 costs $50 million for 5.5 tonnes to GTO (reusable) and $62 million for 8.3 tonnes (expendable) Why would someone pay €75 million to launch 5 tonnes to GTO on the Ariane 6 when they can spend $62 million and get an extra 3.3 tonnes of capacity on the Falcon 9? Based on your numbers, Falcon 9 is $9 million and $7.5…
Because their satellite is, perhaps, 3 tonnes, allowing them to fly in the upper berth for €45 million while another customer pays the rest in the lower berth. Capability isn't useful if your payload doesn't use it.
>Based on your numbers, Falcon 9 is $9 million and $7.5 million per tonne. Ariane 6 is €15 million and €7.8 million, respectively. Given €1 is generally worth more than $1, and that the Ariane's prices are still just projections, I think you made your counterargument.
These prices are within 20%, which I'd call competitive given non-price factors. The claim was not that Ariane was cheaper.
>Source? It's been a few years since I was in the launch industry, but even then piggyback slots on Falcon 9s were in heavy demand. Sufficiently so that a number of companies (e.g. Spaceflight [1]) cropped up to broker them.
Secondary payloads — especially multi-smallsat rideshare — are notoriously hard to coordinate. Spaceflight's SHERPA mission was supposed to fly secondary to the (tiny) Formosat-5 payload, but was pulled due to delays.[0] SFI now plans to stick with "dedicated rideshare" on rockets booked by them entirely for their customers. Their first flight will be SSO-A on a dedicated Falcon 9 later this year.
Historically, Falcon has flown few secondary payloads. An OG-2 prototype flew as a secondary on CRS-1, but was lost due to the engine-out on ascent. Iridium-6 shared with NASA's Grace-FO, after both missions dropped off Dnepr due to the Ukraine crisis.[1] Hispasat-30W carried a small hosted (then released) secondary as part of an experimental deployment system.[2] I can't think of any other notable secondary payloads.
[0] https://spacenews.com/spacex-delays-force-spaceflight-to-fin...
[1] https://spacenews.com/iridium-buys-eighth-falcon-9-launch-sh...
[2] https://spaceflightnow.com/2018/03/12/spacexs-most-recent-la...