CHRONOLOGICAL WEEKLY DETAILS:

STANDARD ROOM :1. ELECTRONIC HEIGHT GAUGE:

CAPABILITIES : Height measurementRANGE : 800 mmLEAST COUNT : 0.001mm

2. FORM TESTER :

CAPABILITIES : Measurement of roundness,squareness,surface finish.

RANGE : Measuring Height -500mm Turn table diameter-400mm

3. MECHANICAL COMPARATOR :

CAPABILITIES :Length measurement

RANGE : Height – 0-400mm Scale - +_ 0.015mmLEAST COUNT – 0.0005mm

4. DIAL GAUGE CALIBRATOR :

RANGE : 0-0.2mmLEAST COUNT -0.1mm

MECHANICAL SECTION :

VARIOUS MACHINES :

1. SCHAUBLIN 125:

It has been originated in Switzerland.Cost of it is Rs 33 lacs.It operates on two axes( X,Z axes).x=130mm,z=560mm.It has a spindle speed of 3000 rpm.

2. ULTRA WIRE CUT :

It was installed in 2005 in HAL . Its cos is around 40 lacs. It operates on three axes.(X,Y,Z). X=400mm Y=300mm Z=250mm It has a capability of profile cutting with minimum filter.

3. CNC TWIN MILL :

It was originated in Germany.It operates on four axes (X,Y,X,C)It has a capability of contour turning,milling.

4. DMG DECKEL MAHO:

It has been originated in germany.It operates on four axes (X,Y,Z,B ).It has a set of 40 tools.It has a spindle speed of 8000rpm.It has a table size of 400*500mm

5. TAJ MAC :

It has been installed in 2006 in HAL. It operates on four asex. It has a spindle speed of 12000 rpm. It has a set of 102 tools. It has a worker area of 800*630mm

6. EMCO TURN 500 :

It has been orginated in Australia. It costs Rs 77.56 lacs.It has two axes.Its turret has 12 stations.It has a capability of precision turning of medium component.

HR SECTION :

THREE TYPES OF COMPANIES :1.Govt .2.Public.3.Private.

VARIOUS LAWS :

1.Minimum wage act.2.Payment of wages act.DIRECT ACTION TAKEN BY EMPLOYEE :

1.Strike.2.Boycott.

3.Tool down and bend down .4.Token Demand .5.Relay hunger.

FACILITIES GIVEN TO EMPLOYEES :

1.Statuitory Facilities .2.Czech Facilities.3.Safety Facilities .

HYDRAULIC AND MECHANICAL SYSTEM OF AIRCRAFT :

AIRCRAFT MECHANICAL SYSTEM:

1.Hydraulic system.2.Aircraft flight control.3.Take off/landing aids.4.Ejection seat.

APPLICATION OF HYDRAULIC SYSTEM :

1.Steering system2.Wheel brake system.3.Thrust reversal of engines.4.Weapons systems.5.Flight control system.

ADVANTAGES OF HYDRAULIC SYSTEM :

1.Power to weight ratio is high.2.system if efficient.

3.It can handle heavy loads.

DISADVANTAGES OF HYDRAULIC SYSTEM :

1.Fire hazardous.2.Oil leak.

HYDRAULIC FLUID USED IN AIRCRAFT :

1.Mineral oil.2.Sysnthetic hydrocarbons.3.Halocarbons.

FUEL SYSTEM OF AIRCRAFT :

TYPES OF FUEL SYSTEM :

1Gravity feed system.2.Pressure feed system.

ENGINE FUEL SYSTEM :

1.Air intake.2.Swirl.3.Compressor.4.Combustion chamber.

TYPES OF GAS TURBINE ENGINES :1.Turbojet.2.Turbofan.3.Turboprop.4.Afterburning turbojet.

FUEL SYSTEM COMPONENTS :

1.Pumps.2.Tanks.3.Lines.4.Valves.5.Fuel-flow meters.6.Filters and Strainers.7.Quantity indicator.8.Warning components.9.Fuel drainers.10.Heaters.

TYPES OF PUMP :

1. Fuel pump system.2. Booster pump.3. Cross feed pump4. Scavenge pump.5. Vane type pump.6. Centrifugal pump.7. Ejector.

ELECTRICAL AND ELECTRONICS SYSTEM OF AIRCRAFT :

TWO TYPES OF SUPPLIES :

1.DC-28V,Battery,DC Generator.2.AC_115V,Alternaotr.

DIRECTION GYRO :

When ever we go any place by motor we have to need the direction of our destination. Similarly in the air also we need the direction that on which direction we go then we our destination that need is accomplished by direction gryo. By this instrument we set the angle of destination, match it with zero and until it is at zero position this is like that will confirmation about that we are gone at right path.

Air temperature gauge is a panel mounted instrument and indicate the out side air temperature .The sensor position of instrument produces o/p on the cockpit and sense the outside air temperature Coding particulars NAME outside air temp gaugeCODE 1629.00.000WEIGHT 150 GmsSIZE 56 *155 mmACCURACY +-1.5 %OPERATING TEMP -45to +75 cel

TEMPERATURE SWITCH :

Temp switch is used in ALH to close the electric circuit when the temp in surrounding air reaches the predetermined value The unit also senses the oil temp of the transmission system

It works on vapor pressure action and consists of bulb containing ethyl alcohol, due to sufficient change in temp the organic liquid vaporizes and build up pressure with in the closed chamber This high vapor pressure compresses a bellow assembly which in tern operates the snap action micro switch Gear box oil temp senses temp with in the range 115+4to 115-4max and 110+4to 110-4 min

ALTERNATOR CONTROL AND PROTECTION UNIT:Alternator control and protection unit regulates the alternator o/p voltage with in specified limit under various rated load and rated condition. This unit is having built in protection against over / under voltage, over / under frequency, overload feeder fault condition, the unit disconnects the alternator from ac control system by denergizing the line contractor and field.

The unit will be interfaced with the alternator having characteristics

Type 3 phase star connection voltage 115/200 400hz

o/p power 5 kva normal speed 12000 rpm max speed for regulation 12600 rpm min speed for regulation 11400 rpm over speed 15000 rpm frequency at 12000rpm 400 Hz

A/C ELCTRIC DISTRIBUTION BOX :

A/C distribution box is used in the advance light helicopter (ALH).Excluding 2 alternator, 2 alternator control and protection unit and static inverter primary a/c distribution consists of the following boxes

1. A/C master box-32. A/C master box-43. 115v a/c emergency bus relay4. 26v a/c emergency bus relay

A/c master box -3 consists of 3 phase main bus -1(115v), 1 phase emergency bus-1 and 2 (115v), I phase main bus-1(26v) and 1 phase emergency bus-1(26v)

During normal operation (both alternator running), complete system-1 is powered from alternator-1 .In case of fault on alternator-1 all the bus of system-1 are connected to alternator-2 with alternator-1 in failed condition. In the case of a short circuit on a main bus-1 it goes disconnect from the alternator-2.In case of both alternator fail to supply the power of A/C main buses, emergency buses of system-1are powered by static inverter with a/c ground power in and selected in the cockpit, external power control card validates in coming ground power and automatically energies the external power connecter to supply ground power to all buses of the system 1and 2 through main bus -1 of the system-1 a/c .Master box-4 is resistor in conduction and function to a/c master box-3 as following.This box does not include external power conductor and the external power control card. However this has non essential bus along with its connector. The non essential bus is powered from the main bus-2 only when both alternators are running or external power is on and selected .All power o/p at different buses are protected with thermal circuit breakers which are provided in each master box.

Operational condition Master power switch ON and bus tie in normal position

1. external power selected 2. alternator -1 selected 3. alternator -2 selected 4. both alternator are selected