Text 13275, 66 rader
Skriven 2014-03-29 15:34:49 av alexander koryagin (2:5020/2140.2)
  Kommentar till text 13217 av Ward Dossche (2:292/854)
Ärende: Re: MH370 update on my March 17th message
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Hi, Ward Dossche!
I read your message from  28.03.2014 21:20
about Re: MH370 update on my March 17th message.

  ak>> I didn't read much on this account. I can only imagine what an
  ak>> auto-pilot can do when the fuel ends.
  WD> When the above situation occurs, the autopilot automatically
  WD> disconnects and the plane is in manual control. No electricity from
  WD> the generators in the engines and the majority of the instruments
  WD> including the hydraulic control of the wing-surfaces as well as the
  WD> vertical stabiliser is lost. Even the wheels cannot be lowered as
  WD> usual.

    I strongly doubt about it. I read that the planes of such a level 
have several internal electrical generators -- the plane must have power 
to switch on its engines, to feed illumination, computers, communication 
etc. Of course, the plane must do all this while its engines are turned off.

    A hydraulic system does not demand many power - its heart is a small 
electrical pump. So, the plane gliding can be controlled -- the plane is 
maintained in a stable horizontal position with its nose slightly up. 
You don't need much power to do such a thing.

  WD> At that time a RAM-turbine drops from the belly of the plane which
  WD> essentially is a small power generator with a propeller which
  WD> provides enough power for some instruments... the radio for
  WD> example... but not all of the control surfaces.
  ak>> The plane was controllable. So, after the fuel ended the plane
  ak>> started to glade down. The auto-pilot controlled it until
  ak>> "landing" in the ocean.
  WD> Bollocks.

  WD> When the engines stop and there's no-one in the cockpit to manually
  WD> fly (glide!) the plane there will be a dramatic loss in forward
  WD> momentum with no slats nor flaps extended.

The plane speed will be maintained by the descending process.

Your theory is based based that all system of the plane are powered by 
the plane engines. It cannot be true that the plane hydraulic system 
depends on engines fully. Bollocks, indeed. The plane must be 
controllable _even when engines fail_. It is the matter of safety.

BTW, the plane aerodynamics is made in such a way that the plane is 
stable in air by itself unless it loses a wing or tale.

Without engines the plane descends and this process maintains speed.

  WD> The rule in aviation is that "speed is life". With no speed, no
  WD> slats, no flaps, no pilot the plane will stall and come tumbling
  WD> down from high altitude, not gentle but dramatic steep.

    The plane never loses its speed completely. It glides down like a 
Space Shuttle from orbit. The task of auto-pilot is simple -- to 
maintain speed and orientation as much as it can. For instance, the 
auto-pilot sees that the plane descends, so it raises the plane nose to 
the possible maximum, keeping the balance. In such a way the plain 
descends. The descending (gliding) speed is not very high.

Modern auto-pilot are very clever. Now they can land the planes themselves.

Bye, Ward!
Alexander Koryagin
fido7.fidonews 2014
--- FIDOGATE 5.1.7ds
 * Origin: Pushkin's BBS (2:5020/2140.2)