Questions tagged [falcon-9]

Questions regarding the Falcon launch vehicle developed by SpaceX for medium payloads (15,000 lbs) to LEO and GEO (via GTO, second stage cannot inject into GEO direct)

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6
votes
1answer
815 views

Was any first stage recovery system tested on SpaceX Falcon 9 flight seven?

My son really was upset he missed the launch live, so we re-watched the video at breakfast and I noticed starting at 3:27 in the video a few seconds after MECO, and stage separation, you can see the ...
21
votes
1answer
7k views

How does SpaceX ignite their engines?

Based on the aborted launch on Thanksgiving 2013 of the first Falcon 9 v1.1 from Florida, we know that an issue occurred where oxygen got into the ground based TEA-TEB sources. I understand that TEA-...
16
votes
1answer
2k views

Why aren't SpaceX controllers allowed to abort during the final 10 seconds?

During yesterday's aborted SpaceX launch, someone was giving instructions to the controllers about abort procedures: To abort the launch, a controller will say 'abort, abort, abort'.... controllers ...
12
votes
2answers
1k views

What caused SES-8's Falcon 9 launch computer to abort at T+2 seconds?

SES-8 had its launch aborted at T+2 seconds. What, exactly, caused the flight computer to decide the engines weren't ready?
5
votes
2answers
417 views

Why is the SES launch going to an apogee of 80,000 km?

Why is the apogee of the Falcon 9 SES launch going clear out to 80,000 km? GEO is only 36,000 km or so, it seems like a waste to go so far beyond it.
9
votes
2answers
954 views

Why did the US lose almost all commercial launch opportunities?

With the launch of the SpaceX Falcon 9 V1.1 Nov 25th (Assuming it succeeds), it will apparently be the first US Commercial launch (I assume to GEO, since Orbital, with all the commercial small sats ...
25
votes
3answers
3k views

When SpaceX claims to build 4 engines/week, which engines do they mean?

In this Tweet (dated 11 Sept 2013) Peter de Selding reported that Gwynne Shotwell of SpaceX said: SpaceX's Shotwell: We're building 7 Falcon 9 fairings/yr now, 15 in 2014, & 4 engines/week ...
3
votes
1answer
435 views

Falcon 9 1.1 demo flight (flight 6) - Was the second stage burn meant to test deorbit?

On F9 flight 6, the first demo of the V1.1 configuration, the putative rationale for the extra second stage burn was to demonstrate relight capabilities for Geosync, and really, any orbit that ...
13
votes
2answers
2k views

What are the mystery Falcon 9 v 1.1 objects?

There are 20 objects in orbit associated with the Falcon 9 v 1.1 launch. So far only 1 has been identified. 5 were payloads of the launch, plus the booster and some debris. Bottom line, 11 objects ...
12
votes
1answer
2k views

What went wrong, Falcon 9 1.1 first flight with first stage landing attempt?

They are reporting that the three engine relight in the upper atmosphere worked. But the relight of a single engine, lower down for pretend landing on the water generated too much torque and the fuel (...
13
votes
1answer
1k views

What are the differences between the Falcon 9 (1.0) and the Falcon 9 (1.1 or F9R)?

With the change at the 6th launch from the original Falcon 9 design for the first five launches, to the new design, either called Falcon 9 v1.1 or Falcon 9R, it would be useful to understand the ...

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