𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐜 𝐃𝐢𝐫𝐞𝐜𝐭𝐢𝐨𝐧 𝐅𝐢𝐧𝐝𝐞𝐫

Automatic Direction Finder

🛩️ADF (Automatic Direction Finder) is the radio signals in the low to medium frequency band of 190 Khz. to 1750 Khz.

🛩️It has the major advantage over VOR navigation in the reception is not limited to line of sight distance.

🛩️The ADF signals follow the curvature of the earth.

🛩️The maximum of distance is depend on the power of the beacon.

🛩️The ADF can receives on both AM radio station and NDB (Non-Directional Beacon).

🛩️Commercial AM radio stations broadcast on 540 to 1620 Khz. Non-Directional Beacon operate in the frequency band of 190 to 535 Khz.

✈️ADF COMPONENTS
✈️ADF Receiver: pilot can tune the station desired and to select the mode of operation. The signal is received, amplified, and converted to audible voice or morse code transmission and powers the bearing indicator.

✈️Control Box (Digital Readout Type) : Most modern aircraft has this type of control in the cockpit. In this equipment the frequency tuned is displayed as digital readout. ADF automatically determines bearing to selected station and it on the RMI.

✈️Antenna: The aircraft consist of two antennas. The two antennas are called LOOP antenna and SENSE antenna. The ADF receives signals on both loop and sense antennas. The loop antenna is a small flat antenna without moving parts. Within the antenna, several coils are spaced at various angles. The loop antenna senses the direction of the station by the strength of the signal on each coil but cannot determine whether the bearing is TO or FROM the station. The sense antenna provides this latter information.

✈️Bearing Indicator: displays the bearing to station relative to the nose of the aircraft. Relative Bearing is the angle formed by the line drawn through the center line of the aircraft and a line drawn from the aircraft to the radio station. Magnetic Bearing is the angle formed by a line drawn from aircraft to the radio station and a line drawn from the aircraft to magnetic north (Bearing to station).

🛩️Magnetic Bearing = Magnetic Heading + Relative Bearing.

➡️Subscribe us for more aircraft knowledge and aircraft fact⬅️

➡️Do Share with your Friends⬅️

Comments

𝐓𝐲𝐩𝐞𝐬 𝐨𝐟 𝐂𝐨𝐦𝐛𝐮𝐬𝐭𝐢𝐨𝐧 𝐂𝐡𝐚𝐦𝐛𝐞𝐫𝐬

🛩️A combustor is a component or area of a gas turbine, ramjet, or scramjet engine where combustion takes place. It is also known as a burner, combustion chamber or flame holder. In a gas turbine engine, combustion chamber is fed high pressure air by the compression system. 🛩️The combustor then heats this air at constant pressure. After heating, air passes from the combustor through the nozzle guide vanes to the turbine. In the case of a ramjet or scramjet engines, the air is directly fed to the nozzle. 𝐀𝐧𝐧𝐮𝐥𝐚𝐫 𝐓𝐲𝐩𝐞 ✈️The most commonly used type of combustor is the fully annular combustor. Annular combustors do away with the separate combustion zones and simply have a continuous liner and casing in a ring. There are many advantages to annular combustors, including more uniform combustion, shorter size, lighter, and less surface area. Annular combustors tend to have very uniform exit temperatures. They also have the lowest pressure drop of the three...

𝗠𝗼𝗻𝗼𝗰𝗼𝗾𝘂𝗲 𝘃𝘀 𝗦𝗲𝗺𝗶-𝗺𝗼𝗻𝗼𝗰𝗼𝗾𝘂𝗲 𝗦𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲

🛫A monocoque structure uses its outer shell to support stresses and loads applied to it, whereas a semi-monocoque structure has an internal "skeleton" of supports and braces to keep its shape rigid and strong. 🛫The vast majority of pressurized aircraft are semimonocoque to help distribute stresses equally along the fuselage during flight. 🛫However, some helicopters use monocoque structure to maximize internal space in the flight compartment. 🛫Monocoque fuselage has its skin holding the skeleton structure together while the semi-monocoque has both the skin and the skeleton holding together. 🛫Semi-monocoque also has "stringers" running horizontally down the plane to help hold the frame together. 🛫The monocoque fuselage also cannot be used for airframes after a certain size (small aircraft with single engine), but the semi-monocoque has been used from single piston engines to commercial airliners. 🛫A monocoque design would also have ...

𝐖𝐞𝐭-𝐒𝐮𝐦𝐩 𝐎𝐢𝐥 𝐒𝐲𝐬𝐭𝐞𝐦

Wet Sump Oil System ✳️The engine oil system performs several important functions: 🛩️Lubrication of the engine’s moving parts . 🛩️Cooling of the engine by reducing friction . 🛩️Removing heat from the cylinders . 🛩️Carrying away contaminants . 🛩️Providing a seal between the cylinder walls and pistons. ➡️Subscribe us for more aircraft knowledge and aircraft fact⬅️ ➡️Do Share with your Friends⬅️

The Aviation Science

Search This Blog