[AR] Re: SN-10 launch attempt imminent?

  • From: J Farmer <jfarmer@xxxxxxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Thu, 4 Mar 2021 15:58:25 -0500

I haven't dug deeply into it, I've seen images showing crumpling at the base of the nose cone, one image that appears to show a bend in the mid-body of the airframe, another where it seems like the ship is sitting on the engine compartment skirt, not the landing gear, etc.

John

On 3/4/2021 1:29 PM, Thomas wrote:

John, there is a screen cap circulating that shows fire in the lox tank before the RUD, so strongly suggests shock damage to the methane line.

Thomas

Sent from my iPhone

On 5 Mar 2021, at 4:14 am, roxanna Mason <rocketmaster.ken@xxxxxxxxx> wrote:


 things involving serious dynamics are hard to sort out except in
flight test,

Yup, I can't remember the number of films I've seen of Atlas launch failures but everytime I see one it's usually one I've not seen before.
Was it in the dozens? And DOD didn't have the same test philosophy that SpaceX/Musk has.

Ken

On Thu, Mar 4, 2021 at 7:48 AM Henry Spencer <hspencer@xxxxxxxxxxxxx <mailto:hspencer@xxxxxxxxxxxxx>> wrote:

    On Thu, 4 Mar 2021, J Farmer wrote:
    > Elon is a fan of the "Build it, run it, break it, fix it, run
    it again",
    > rinse and repeat approach.
    > For much of engineering history that I recall, that was "Standard
    > Operating Procedure"...

    Yeah, and there's a reason why engineering moved away from that. :-)

    > But yeah, part of the engineering data they appear to be
    getting is
    > about the Raptor design.  There's a world of difference between
    getting
    > one to run on a stand and in a steady state "hop". And an
    equally large
    > jump from that to starting and stopping them while involved in
    energetic
    > vehicle maneuvers.

    Yes, things involving serious dynamics are hard to sort out
    except in
    flight test, and that just has to be allowed for.

    Henry


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