Talk:SpaceX reusable launch system development program/Archive 1: Difference between revisions

Revision as of 04:53, 2 April 2017

Revision as of 04:57, 3 April 2017

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:::::Think I have seen a Elon Musk interview where on being asked this question he likened it to if you build an aircraft capable of crossing the Atlantic then are there going to be other people flying across the English Channel? That of course doesn't indicate that SpaceX have moon plans and may tend to indicate either they don't or they don't want to disclose any plans they have. Impression was he thinks it is inconceivable we would do Mars and not also have someone else doing something on the moon. [[User:C-randles|crandles]] ([[User talk:C-randles|talk]]) 17:12, 23 December 2015 (UTC)

::::::He used boats rather than planes. See [https://www.youtube.com/watch?v=y13jbl7ASxY&feature=youtu.be&t=23m20s] [[User:C-randles|crandles]] ([[User talk:C-randles|talk]]) 23:22, 23 December 2015 (UTC)

== First stage velocity at separation ==

It is probably time to revisit the article info on separation speeds before booster flyback. New, specific, info is available on the first two actual flights of the [[Falcon 9 full thrust]] version of the rocket is now available: [[Falcon 9 Flight 20]] in Dec 2015 and [[Falcon 9 Flight 22]], slated for launch later today. This source (<!-- <ref name=reuters20160223> -->

{{cite news |last=Klotz |first=Irene |url=http://www.reuters.com/article/us-space-spacex-ses-idUSKCN0VW2O7 |title=Satellite operator SES says interested in used SpaceX rocket |work=Reuters |date=2016-02-23 |accessdate=2016-02-24 }}<!-- </ref> -->) provides clear info on the Falcon 9 part of the question:

<blockquote>the rocket launching this week will be flying almost twice as fast as the one used in December - between 4,971- to 5,592 mph ( 8,000- to 9,000 kph), compared to 3,107 mph (5,000 kph) - by the time it separates from the second-stage motor, SpaceX said. </blockquote>

FWIW, the info on these velocities that is currently in the first paragraph of this article, is based on orginal forward-looking design information from several years ago in 2012 (and there was lengthy Talk page discussion getting to that...):

<blockquote> If the technology is used on a reusable Falcon 9 rocket, the first-stage separation would occur at a velocity of approximately 2.0 km/s (6,500 km/h; 4,100 mph; Mach 6) rather than the 3.4 km/s (11,000 km/h; 7,000 mph; Mach 10) for an expendable Falcon 9, to provide the residual fuel necessary for the deceleration and turnaround maneuver and the controlled descent and landing.</blockquote>

So the article will definitely need an update, and I don't have time to do it just now. [[User:N2e|N2e]] ([[User talk:N2e|talk]]) 12:57, 24 February 2016 (UTC)