|Quoting DashTrash (Reply 149):|
Uh..... Not in anything I've flown. Must have weight on wheels to open the buckets. I know the DC-8, as you're discussing could use the inboard reversers in flight, the C-17, and some Soviet designs as well, but that's it to my knowledge.
Quote from a technical book I have on the 80 reversers.
"Each thrust reverser has two, hydraulically operated, doors.The reverser lever on the throttle controls the position of the doors, as well as the reverse power setting. The lever can only be moved into the reverse range when the throttle is in the idle position. Initial aft movement of the lever to its interlock stop releases the door safety latch, deenegizes the shutoff valve solenoid and moves the reverser control valve into reverse position.
When the doors are extended to reverse position, the interlock stop will be released, allowing maximum reverse thrust operation.
Observe - there is no technical device that will prevent the pilot from applying reverse thrust at FL
310. The system is "failsafe" but not "fool proof"
Something that we were taught numerous times throughout ground school on the MD
Also, the emergency memory item for a bucket deployment in flight, is to bring the affected throttle immediately to idle, and verify the reverse lever is in the "full down" position, as their is nothing preventing it from engaging in flight. It is important for the general public to know, that a bucket deployment in flight on the MD
-80 is NOT a catastrophic event, with the correct training and a quick response from the crew. It is something we train for in the simulator on a fairly regularly bases.
That being said, regardless of the ground spoiler position or auto brake function, the reverse thrust system can be engaged prior to the wheels having weight on them, which given different spool up times, could very well cause a significant yawing motion on the plane.