Layout and operation of typical thrust reversing system, Other Engineering

Layout and operation of typical thrust reversing system:

Clamshell door system

The clamshell door system is a pneumatically operated system, as shown in detail in fig Normal engine operation is not affected by the system, because the ducts through which the exhaust gases are deflected remain closed by the doors until reverse thrust is selected by the pilot.

On the selection of reverse thrust, the doors rotate to uncover the ducts and close the normal gas stream exit. Cascade vanes then direct the gas stream in a forward direction so that the jet thrust opposes the aircraft motion.

The clamshell doors are operated by pneumatic rams through levers that give the maximum load to the doors in the forward thrust position; this ensures effective sealing at the door edges, so preventing gas leakage. The door bearings and operating linkage operate without lubrication at temperatures of up to 600 deg.C.

375_Layout and operation of typical thrust reversing system.png

Bucket target system

The bucket target system is hydraulically actuated and uses bucket-type doors to reverse the hot gas stream. The thrust reverser doors are actuated by means of a conventional pushrod system. A single hydraulic powered actuator is connected to a drive idler, actuating the doors through a pair of pushrods (one for each door).

The reverser doors are kept in through the drive idler. The hydraulic actuator incorporates a mechanical lock in the stowed (actuator extended) position.

In the forward thrust mode (stowed) the thrust reverser doors form the convergent-divergent final nozzle for the engine.

Cold stream reverser system

The cold stream reverser system can be actuated by an air motor, the output of which is converted to mechanical movement by a series of flexible drives, gearboxes and screwjacks, or by a system incorporating hydraulic rams.

When the engine is operating in forward thrust, the cold stream final nozzle is 'open' because the cascade vanes are internally covered by the blocker doors (flaps) and externally by the movable (translating) cowl; the latter item also serves to reduce drag.

On selection of reverse thrust, the actuation system moves the translating cowl rearwards and at the same time folds the blocker doors to blank off the cold stream final nozzle, thus diverting the airflow through the cascade vanes.

 

 

1743_Layout and operation of typical thrust reversing system1.png

2105_Layout and operation of typical thrust reversing system2.png

Posted Date: 9/12/2012 2:20:01 AM | Location : United States







Related Discussions:- Layout and operation of typical thrust reversing system, Assignment Help, Ask Question on Layout and operation of typical thrust reversing system, Get Answer, Expert's Help, Layout and operation of typical thrust reversing system Discussions

Write discussion on Layout and operation of typical thrust reversing system
Your posts are moderated
Related Questions
easy defination of zener diode nd its application and characteristics ?

can you help me in my assignment in Engineering project and operation management course??

The guidance law is used to generate a requirement (usually an required acceleration) that will achieve the guidance objective. In this course, we will look at three main types

Q.4 Explains subtractive rapid prototyping process and compare with additive process.                                                   OR What are additive and su

Two types of climb will be considered. The first is the so-called steady climb. This is a climb in which the all acceleration components (i.e. parallel and perpendicular to the fli

Capital Budgeting Decisions The most important function of a finance manager is the efficient allocation of its capital. The investment decision of a firm is termed as capital budg


Full-authority digital electronic control: The supervisory control was a step toward the full-authority, fully redundant EEC. It controls all engine functions and eliminates th

Q. Explain the TIG and MIG systems of arc welding Give the applications of each.                                                         OR         Explain briefly

A trimmed flight condition is perhaps best thought of as an equilibrium condition. The simplest trim condition is straight-and-level flight, in which the forces (weight, propulsive