Soyuz TMA-12 faulty

(Derek Lyons) wrote:

:"Reunite Gondwanaland (Mary Shafer)"
:wrote:
:
:On Tue, 10 Jun 2008 17:53:58 GMT, (Derek Lyons)
:wrote:
:
: Rick Jones wrote:
:
: In sci.space.history Alain Fournier wrote:
: Not necessarily. The airflow is reversed between take-off and
: landing.
:
: It is for a plane, but would it be for a VTVL rocket? Wouldn't they
: always be pointing "down?"
:
: For takeoff, the inlets face forward - into the flow. For landing,
: the inlets face aft - against the flow. This make the already
: difficult problem of designing the inlets even more difficult.
:
: Ensuring that the engines recieve sufficient airflow and avoiding
: recirculation during landing will be amusing.
:
:I'm not sure how much of a problem that is. After all, the F-104 has
:two 90° turns in the intake path and it seemed to manage quite well.
:
:As Pat say, this is incorrect.
:
:The F-104 also didn't operate in an environment that promoted
:recirculation.
:

Yep. Reingestion of hot exhaust is a problem for the Harrier (for
example), so I doubt that it would be less of a problem in an
application where the intakes actually face downwards.

However, on the other hand, thrust reversers have been around for a
long time...

--
"The reasonable man adapts himself to the world; the unreasonable
man persists in trying to adapt the world to himself. Therefore,
all progress depends on the unreasonable man."
--George Bernard Shaw