====================================================================================

Ignore request below;

('Feathering' was explained in the article & is something completely different)

==================================================================================
--------------------------------------------
On Mon, 11/3/14, Phil Pugliese (via tml list) <nobody@simplelists.com> wrote:

 Subject: Re: [TML] 'Rocket Science' gets even 'harder'!
 To: tml@simplelists.com
 Date: Monday, November 3, 2014, 1:05 PM

 This email was sent from
 yahoo.com which does not allow forwarding of emails via
 email lists. Therefore the sender's email address (philpugliese@yahoo.com)
 has been replaced with a dummy one. The original message
 follows:

 --------------------------------------------
 On Mon, 11/3/14, Bruce Johnson <johnson@Pharmacy.Arizona.EDU>
 wrote:

  Subject: Re: [TML]
 'Rocket Science' gets even 'harder'!
  To: "tml@simplelists.com"
 <tml@simplelists.com>
  Date: Monday, November 3, 2014, 11:16 AM

  On Nov
  3, 2014, at 10:16 AM, Phil Pugliese (via tml
 list) <nobody@simplelists.com>
  wrote:

  >
 The NTSB's
  preliminary

 > investigation is pointing
  at the
 feathering
  > system being
  activated early and that it was
  > pilot
  error.
  >
  > http://www.voanews.com/content/ntsb-descent-system-of-crashed-virgin-spacecraft-activated-early/2505720.html
  >
  > --

 ------------------------------------------------------------------------------------
  >
  > Anyone have any
 info
  as to how that would cause an
 explosion?

  It appears
 that the aircraft didn't
  explode,
 actually since the propellant tanks and rocket
  motors were found to be intact. The airframe
 broke apart,
  either as a result of the
 feathering system being activated
  or as a
 precipitating even for the activation.

  Ars Technica has an article

 with some photos of the event <http://arstechnica.com/science/2014/11/ntsb-spaceshiptwo-broke-apart-when-feathering-activated-early/>

  --
 ---------------------------------------------------------------------------------------------

 Thanks for the info;

 You know, way back in the old
 days when all a/c had props, 'feathering' an engine
 meant that the blades of the blade were rotated so that they
 wouldn't 'catch' the air anymore. It was used
 when it was necessary to 'kill' an engine so that
 the prop wouldn't 'windmill' & create a drag
 on the rest of the a/c. My dad used to talk about it
 sometimes.

 I've never
 heard of the term used for anything but
 'prop-jobs'.

 Anyone
 know what the term means wrt rocket engines?

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