Improved Fabrication Methods of Jet Engine Rotors

Abstract Flexible rotor assemblies often consist of two or more rotor modules which are index-balanced against each other with the purpose of eliminating the need for re-balancing if a module should have to be exchanged. However, the index procedure may cause vibration problems because it ignores certain flexible rotor balancing requirements. This paper describes a modal balancing approach based on jet engine rotors which are typically balanced as ISO Class 2 (quasi-rigid) rotors. Appreciation is expressed to Prof. R. Gasch of TU Berlin for his valuable suggestions.

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Real-time detection of developing cracks in jet engine rotors

2000 IEEE Aerospace Conference. Proceedings (Cat. No.00TH8484) ◽

10.1109/aero.2000.877893 ◽

2002 ◽

Cited By ~ 1

Author(s):

H. Eric

Keyword(s):

Real Time ◽

Jet Engine ◽

Real Time Detection ◽

Engine Rotors

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Human resources sensitivity to system design tradeoff alternatives: Feasibility test with jet engine data.

PsycEXTRA Dataset ◽

10.1037/e440862004-001 ◽

1973 ◽

Author(s):

William B. Askren ◽

Kenneth D. Korkan ◽

George W. Watts

Keyword(s):

Human Resources ◽

System Design ◽

Jet Engine ◽

Feasibility Test

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DETERMINATION OF THE TYPE OF A SINGLE-USE GRENADE LAUNCHER BASED ON ITS COMPOSITE PARTS AND FRAGMENTS OF REACTIVE GRENADE FOUND AT THE PLACE OF ACCIDENT

Theory and Practice of Forensic Science and Criminalistics ◽

10.32353/khrife.2017.31 ◽

2017 ◽

Vol 17 ◽

pp. 245-252

Author(s):

V. V. Somov

Keyword(s):

Combustion Chamber ◽

Structural Features ◽

Outlet Section ◽

Technical Expertise ◽

Jet Engine ◽

Size Ofthe ◽

Single Use ◽

Nozzle Block ◽

Considerable Damage

In carrying out an investigation into the explosion, among others, the investigative version of the use of a single-use reactive grenade launcher is being considered. The most common for criminal explosions are applied grenade launchers RPG-18, RPG-22, RPG-26. Their use is due to a number of such properties as small size and weight, which makes it possible to transfer them covertly, the range of the shot significantly exceeding the range of the hand grenade throw, the high detonating effect of the rocket grenade explosion. The single-use rocket launchers are generally of the same design. Their differences are in the features of the components construction and dimensional characteristics, which are given in the article. On the basis of expert practice, details ofgrenade launchers that remain at the site of the explosion and have the least damage are determined. These details are the objects of investigation of the explosion technical expertise. These objects include launchers of grenade launchers and rocket parts ofjet grenades. The design features of the launchers, their dimensional characteristics and marking symbols make it possible to determine their belonging to a specific type of jet grenade launchers. Missile parts of jet grenades differ in the form of the combustion chamber of the jet engine, nozzle, in the size ofthe outlet section of the nozzle, in the form and size of the stabilizerfeathers. To determine the belonging of the rocket part of the grenade to a specific type ofjet grenade launcher, it’s necessary to establish a set of structural features and dimensional characteristics. At considerable damage of the combustion chamber of the jet engine, as a rule, the nozzle block remains intact that allows to define diameter of critical section of a nozzle, and on it to establish type of the used single-use grenade launcher.

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