Leaning tower of falcon 9

The LA Times is reporting today's landing attempt was unsuccessful:

SpaceX launches two satellites, but drone ship landing is unsuccessful.
http://www.latimes.com/business/la-f...nap-story.html

Elon Musk Verified account
�@elonmusk
Looks like thrust was low on 1 of 3 landing engines. High g landings v
sensitive to all engines operating at max.
https://twitter.com/elonmusk/status/743097337782763521

My opinion, in order to land successfully in a consistent fashion SpaceX
will have to give the F9 hovering ability.

High g landings are endemic to a "hover-slam" landing, more commonly
referred to as a "suicide-burn", more accurately referred to as "land or
slam", since without hovering ability, you only get one chance at it. You
either stick the landing on the first try, or you crash and burn.

Bob Clark


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"Dr J R Stockton" wrote in message
nvalid...

In sci.space.policy message -
september.org, Mon, 6 Jun 2016 07:14:24, Jeff Findley
posted:

In article id,
says...

In sci.space.policy message -
september.org, Fri, 3 Jun 2016 15:48:38, Jeff Findley
posted:

3. Getting the thing vertical when the barge is moving in the ocean
would be "challenging".

I think not. One need only pump ballast within the barge in the
compensating direction. It is getting the thing perpendicular to the
deck that should be difficult.

You could do this, but I would think doing so would screw up the ability
for the tug to get it back to port in a timely fashion.

Many seagoing vessels have been towed to port, often in extreme
conditions, with very considerable lists. Even the "Flying Enterprise"
was nearly saved : https://en.wikipedia.org/wiki/SS_Flying_Enterprise.


Since the vast majority of the mass of an empty stage is at the bottom,
actual tilt is relatively unimportant.

In other words, "if it ain't broke, don't fix it". So what if it was
leaning? It made it back to port safely, which is what matters.

Yes; I was only challenging the 'would be "challenging"', not advocating
that it would be _useful_ to do it.


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