Magnets in aeronautics and aerospace engineering have been used for a long time and are specifically designed to be used in extreme environments and work for long run. The aerospace industry is a sector that has experienced great technological and scientific advances in recent years.

Therefore, as the demands and temperatures of the challenges have increased, it becomes necessary to manufacture magnets that maintain them and accomplish difficult missions. Magnets in aerospace engineering must have a numerous attributes that make them suitable to adapt to the harsh environment in which they will be used, so that, among the basic conditions of use, they must:

1. Able to reduce weight.
2. Small Sizes or miniature sizes as per application demands.
3. Show flawless long-term performance in the harshest conditions.
4. Long service life.
5. Must be economical and reduced cost of production and fuel.
6. Maximum performance and Greater efficiency.
7. Higher retention/holding force.
8. Better grip to the distances.

In aerospace engineering designing magnets, requires critical tensile forces, field strength, temperature, torques, and sensor specifications, among others properties, must be taken into account.

How magnets do aids in aerospace engineering?
For dangerous and critical missions in space, a permanent magnet can be designed to perceive an actuator's position, make fuel pumps, detect fluid flow rates and operate temperature generators. Magnets in aerospace engineering also help reduce carbon and aids in increasing fuel efficiency through miniaturization with better recyclability.

What types of magnets are used in aerospace engineering?
For aerospace sector, hybrid magnets, compression-bound magnets, injection-molded magnets are used. Samarium cobalt is commonly used in aerospace and military applications, mainly due to its high working temperature. NdFeB 30AH and 33AH could be another interesting option with a working temperature of up to 240. Magnets in aerospace engineering are used for:

1. Missile programs.
2. Flight control covers for commercial and combat aircraft.
3. Aircraft loudspeakers.
4. Operation of the TWT radar.
5. PM generator rotor assemblies.
6. Fuel pump.
7. Flow regulators.
8. Cryogenic magnets Development for space.
9. Magnetic holder's seats grip.
10. Calibration of speed sensors.
11. Operation of air compressors.
12. Operation of motorized generators.
13. Operation of tachometer generators.

Electromagnetic propulsion is one of the great uses of magnets in aerospace engineering. In fact, in submarines, magnetic propulsion is fundamental because it can drive a boat through the water with a propeller less, silent, and maintenance-free form.

The magnetic propulsion system applies to all ships, luggage ships, Cruise ships, submarines, torpedoes, and those that travel in saltwater. It can be confirmed experimentally, the magnetic device is also useful as a spatial drive system to provide plunge force to a ship traveling in an ionic atmosphere such as space.

The new designs of magnet systems and permanent magnets are manufactured that are lower in weight and perform optimally for the long term inthe toughest environment. Such magnet systems are used in actuators, linear drives, and electric motors, including those projected for the aerospace industry. Weight reduction is always desirable for the aerospace industry. It is now possible by using alternative magnet types with higher efficiency.

The physical and mechanical properties of magnetic materials are employed from the earliest design stages that are lighter and cost-effective alternatives. Military and aerospace magnetic applications are designed to be used in extreme environments and work for a long time.

Samarium cobalt is commonly used in aerospace and military applications, primarily due to its property in high working temperature. The new NdFeB 30AH and 33AH are interesting choices for engineers working with spacecraft with a working temperature up to 240C and beneficial for aeronautics.

References: (1; (2); (3)

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