Aircraft Technical

  What we call encircled metal stripe object on below Picture?                                                                     Fig 01 Rain Gutter Well, It is called  rain gutter.The Purpose of rain gutter is to prevent drip of rain water, condensation water , de-icing fluid on passengers or crew during embarkation or de-embarkation .It also keeps water out of the plane interior,where floors can become slippery.                                                               Fig 02 Rain Gutters Installed Position Rain Gutter installed on passenger aircraft are usually fixed above cabin door on fuselage section.The size of rain gutters is limited due to aer...

  Insulation blanket is heat and acoustic barrier.It is made of fiberglass wool.Fiberglass wool filled between waterproof polyurethane covers and edges are sealed to prevent water ingress.                                    Fig 1 Insulation Blanket on Fuselage Structure Aircraft necessarily create a lot of unwanted noise. The main source of noise in aircraft are engines and air flow, which transits through the fuselage and overall structure. In order to make aircraft interior quieter, an insulation blanket used. When aircraft at high altitude, the outside temperature is about -60-degree Fahrenheit. In combination with pressurization, aircraft insulation material helps keep the cabin warm by filling the space between the interior wall and the aircraft fuselage.   As we know that fire retardant material is must for all aircraft. The reason of choosing fire retardant material is to minimize...

Why Wing Tip Brake of Flap and Slat Installed at outboard of wing? The function of wing tip brake to hold and stop rotation of flap/slat transmission shaft when slat/flap control computer sense asymmetry, uncommanded or runways condition of flap/slat. Wing tip brake(WTB) work similar to pressure  off brake(POB).Pressure off brake installed in power control unit (PCU) and wing tip brake separately placed at wing tip. The contraction of WTB and POB similar to brake of an aircraft. As the brake has stator, rotor and piston housing similarly we have stator, rotor and piston housing  in WTB and POB . Pressure Off Brake                                                               Fig 1  Pressure  Off Brake POB consist of friction disc, spring and piston assembly for actuation of spring. When hydraulic pressure avai...

When you are in the aircraft and as aircraft lands have you felt sudden impact of load on your body? May be not because these impacts load taken by aircraft landing gear. In some Situation you may felt impacts load due to hard landing of an aircraft.  Aircraft Landing Gear act like legs of an aircraft similar to human body legs. As, we stand our body weight transmitted on ground through our legs. Similarly, aircraft weight  transmitted on ground through its landing gear. Landing gear also take load at time of  takeoff, landing and ground maneuvering. But, How this load transmission take place on ground through human body and aircraft landing gear ? In Human body we have bone and viscoelastic muscle ( between leg joints) in our legs which take body weight and transmit on ground. Aircraft landing gear has shock strut and shock absorber. Shock strut work as bone and shock absorber act like viscoelastic muscles. How the shock absorber of landing gear absorb the impact loa...