In article mn.65657df13518d3be.127094@snitoo,
says...

JF Mezei explained on 1/12/2015 :

Are parachutes involved to slow down and give the tube vertical
orientation ? Or is it all done with fuel/aerodynamics ?

Vertical orientation can be done with the paddle fins and steerable
motors.


"ran out of hydraulic fluids". Wouldn't hydraulics normally be in a
closed loop system where there is no loss ?

Just like the shuttle needed APUs to run the hydraulics, I'd imagine an
energy source was needed to provide the pressure that acutally moves
things. Lacking more detailed information, I'd guess that the energy
source ran out of juice. No Catepillar diesel engine aboard,
apparently.

The energy source is likely the same pressurant tank (nitrogen?) that
pressurized the fuel and oxidizer tanks. That is used to pressurize a
tank of hydraulic fluid that powers the actuators for the grid fins. To
save mass, the system is "open" in the sense that once the fluid passes
through the actuator, it can't be used again. There is speculation (on
the net) as to whether or not the fluid is dumped overboard or caught in
a waste tank.

Jeff
--
"the perennial claim that hypersonic airbreathing propulsion would
magically make space launch cheaper is nonsense -- LOX is much cheaper
than advanced airbreathing engines, and so are the tanks to put it in
and the extra thrust to carry it." - Henry Spencer