Book 2 - Thrust Reverse Flashcards
there will be occasions where the aircraft is required to land on runways which are ________ than those for which the aircraft was purchased. it is also beneficial to use less of the runway than that which is available in order to have a _______ margin in the event of failure.
there will be occasions where the aircraft is required to land on runways which are SHORTER than those for which the aircraft was purchased. it is also beneficial to use less of the runway than that which is available in order to have a SAFETY margin in the event of failure.
thrust reverse is especially useful when the runway is ___ or slippery, when braking _________ is reduced and the tyres can no longer adhere sufficiently to the runway surface
thrust reverse is especially useful when the runway is WET or slippery, when braking EFFICIENCY is reduced and the tyres can no longer adhere sufficiently to the runway surface
thrust reversal reduces rapid wear on ______ and _____
thrust reversal reduces rapid wear on BRAKES and TYRES
the four requirements of a thrust reverse system:
- must not affect engine ________, when is use or not
- be able to withstand high __________
- be mechanically strong but light in ______
- be ____ safe
the four requirements of a thrust reverse system:
- must not affect engine OPERATION, when is use or not
- be able to withstand high TEMPERATURES
- be mechanically strong but light in WEIGHT
- be FAIL safe
on a propeller engine, reverse thrust is achieve by reversing the pitch of the _________. this projects thrust ___ degrees forward
on a propeller engine, reverse thrust is achieve by reversing the pitch of the PROPELLER. this projects thrust 180 degrees forward
in a jet engine, reverse thrust is directed forward at __ degrees to the horizontal. and so is not as effective as that of a _________. reverse thrust is __% as useful as normal thrust in a jet engine
in a jet engine, reverse thrust is directed forward at 45 degrees to the horizontal. and so is not as effective as that of a PROPELLER. reverse thrust is 50% as useful as normal thrust in a jet engine
what are the three main types of thrust reverser fitted to jet engines?
- clamshell doors
- retractable ejector
- cold stream cascade reverser
clamshell doors are ___________ operated which block off the stream of air from the exhaust and simultaneously diverts the stream forwards and to the sides at the correct _____, through ________ vanes so to avoid directing at ______ and ______ etc.
in the stowed position, the doors are folded _____ inside the exhaust
clamshell doors are PNEUMATICALLY operated which block off the stream of air from the exhaust and simultaneously diverts the stream forwards and to the sides at the correct ANGLE, through CASCADE vanes so to avoid directing at BRAKES and TIRES etc.
in the stowed position, the doors are folded FLUSH inside the exhaust
the retractable ejector uses _______ that deploy backwards to block air and divert forward. there are __ cascade vanes fitted. __________ actuated and forms __________ nozzle in stowed position
the retractable ejector uses BUCKETS that deploy backwards to block air and divert forward. there are NO cascade vanes fitted. HYDRAULICALLY actuated and forms PROPELLING nozzle in stowed position
cold stream reversers employ ___________ cowls, which move backwards to uncover _________ vanes. simultaneously, ________ doors deploy into cold stream to divert air forwards. hydraulically or ___________ operated. translation cowls form part of ________ when stowed. blocker doors form part of fan duct.
cold stream reversers employ TRANSLATION cowls, which move backwards to uncover CASCADE vanes. simultaneously, BLOCKER doors deploy into cold stream to divert air forwards. hydraulically or PNEUMATICALLY operated. translation cowls form part of NACELLE when stowed. blocker doors form part of fan duct.
reverse thrust is selected on the flight deck by a _________ input from the throttle lever, typically by moving a separate _____ which is attached to the throttle
reverse thrust is selected on the flight deck by a MECHANICALLY input from the throttle lever, typically by moving a separate LEVER which is attached to the throttle
the throttle must be in the minimum _____ position (fully to the ____) prior to selecting reverse thrust
a mechanical _________ prevents the pilot from making the reverse thrust section if not in the detent
the throttle must be in the minimum POWER position (fully to the REAR) prior to selecting reverse thrust
a mechanical INTERLOCK prevents the pilot from making the reverse thrust section if not in the detent
should the operating system for an individual thrust reverser ____, a mechanical lock will hold that reverser in the forward thrust (______) position
should the operating system for an individual thrust reverser FAIL, a mechanical lock will hold that reverser in the forward thrust (STOWED) position
should one reverser fail to deploy normally on a ____ engine aircraft, the reverser on the other engine would be automatically _________. the pilot can _________ the system to operate the one reverser
should one reverser fail to deploy normally on a TWIN engine aircraft, the reverser on the other engine would be automatically ISOLATED. the pilot can OVERRIDE the system to operate the one reverser
reverser _________ will be indicated on the flight deck. stowed and deployed as well as ________ of any of the components.
reverser POSITION will be indicated on the flight deck. stowed and deployed as well as FAILURE of any of the components.
