aerobysam

Propellers are the basically a airfoil that unlike the fixed wing airfoil is forced to rotate around the hub. This rotation of the propeller produces acceleration of the air ie the air is sucked in with high acceleration. This results in the forward motion of an aircraft. With increase in engine power and need, the design factors of any propeller play an important role. The design factor of a propeller are: 1. Blade tip speed. 2. Solidity of the blade. 3. Aspect Ratio. 4. No of blades. As the increasing production of powerful engine, the propeller also need to absorb the high power of the engine. The increase in the power of the propeller means increase in the volume of air being sucked in. This can be achieved in different ways. 1. increase the diameter of the propeller 2. increase the solidity of the propeller 3. increase the number of the blades The blade tip speed can be delayed by using scimitar- like the swept back wings used in aircrafts. ---------------...

It is not marsheller or marschaller. It is Marshaller with 2 a and 1 e and without c. This is an addition to communication between ATC and Pilot. It helps to reduce the work load of an ATC operator. The dress code for a marshaller are: 1. Reflecting safety vest 2. Helmet with Acoustic earmuffs 3. Marshalling wands (Handheld illuminated beacon) The main function of a marshaller is to guide the pilot during parking after landing and taxing to the runway for takeoff. Excessive noise can cause hearing loss in marshallers, either imperceptibly over years or after a one time acoustic trauma. Therefore in many modern airports, the Marshallers are replaced by VDGS (Visual Docking Guidance System). Necessary indications: keep turning slow down stop start engine shutdown engine/ cut engine identify gate  continue to taxi straight ahead turn right turn left hold position/ stand by process to next marshaller or as directed by next marshaller or tower fire self brak...

Auxiliary Power Unit is an essential part of an aircraft. The primary function of this unit is to start the engine. In smaller aircraft the APU used is an electric motor. However, in the modern aircraft the APU used is an air turbine  motor. Basic parts of an air turbine motor APU are: 1. Power section  Power section like other gas turbine engine consist of compressor, combustion chamber and turbine. It consist of a single stage centrifugal compressor, combustion chamber and 2 stage axial flow turbine.  As the APU main switch is turned on, the inlet from the right side of the APU system allows the atm air to enter to the system. The inlet air is compressed by the centrifugal compressor which is turned through a shaft coupled with a starter/ generator. The starter/ generator is powered by GPU or Battery cart. The input from a GPU - 115V of 400kh AC current or input of 28V DC current is converted into 270V DC current using Start power Unit and finally the start conv...

Thrust Reversal consist of 2 words. Thrust and reversal. This is a process adopted to reduce the aircraft velocity during landing. It is a type of braking system. The braking system in an aircraft consist of: 1. Landing Gear brakes. 2. Ground Spoilers 3. Thrust reversal. So while talking about the thrust reversal, the type of aircraft has an important role to play. For the propeller driven aircraft  the reverse thrust is achieved with the appropriate change in the blade angle. However for a jet engine the reversal of the thrust come in basically 2 major types: 1. Reversal by the use of hot exhaust. 2. Reversal by the use of cold bypass air. Classification in terms of mechanism used are: 1. Target (bucket) type  Operated With hydraulics in turbojet engine 2. Clamshell (Cascade) type  Operated with Pneumatics in Low bypass turbofan engine 3. Coldstream type The cold stream reverser system is activated by an air motor in High bypass turbofan engine ...

General Inspection: Ventilating Ram air inlet duct for cabin air. Pitot Heads and static Vents Drain holes and inspection of derbies on the fuselage  Antennas (underside) Wheel nose tire Nose oleo and Piston Cover Pitot Before going in depth about the further steps in the inspection, we need to know the areas of the planes that are used as a nomenclature to represent certain parts of the aircraft. They are: A1 , A2 , A3, A4, A5 A1 Internal  Ensure Gust lock- flaps 0 and brakes set A2 External Main wheel assembly brake   A2 Internal Battery and flashlght firstaid kit- seal check   A3 External Inspect stabilizers, rudder, elevators, trim and geared tabs A4 External Inspect fire extinguishing indicator discs for evidence of extinguisher discharge. Inspect wing strut Inspect wing fuel vent outlet Engine: Inspect engine intake deflector and screen Check for oil level inspect propeller blade   A5 External Inspect...

Inspection of an aircraft is not an easy job. Though all the steps for the process is given on the inspection manual. The fact that any minor mistake can lead to human casualties is in itself a thing to get nervous about. There are many varieties of inspection in any aircraft. One of the various class of aircraft inspections are: 1. A - check 2. B - check 3. C - check 4. D - check Other inspection involve: 1. 100 Hours check 2. DI (Daily Inspection) 3. PDI (Pre- flight Daily Inspection) 4. HLI (Heavy Landing Inspection)

Fan: Fan moves air. It receives certain energy from engine or drive shaft --- which results in movement of the air through the motion of the fan blades. Propeller: Propeller moves the aircraft or machine.  Turbine: Turbine uses energy of a moving air into mechanical energy.