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An auxiliary safety system for controlling the attitude of an aircraft (1) provides sensors placed on the aircraft (1) which identify stalling and/or other critical flying conditions that are imminent and/or have occurred, an electronic control unit (101, 201) connected to the sensors (106, 107, 108, 206, 207, 208), and propellers placed on the aircraft each suitable to generate a continuous thrust; the electronic control unit (101, 201) activates the propellers, in case the above mentioned conditions occur, in order to generate a continuous thrust for all the duration of the attitude correction and be able to recover the proper flight attitude of the aircraft. The system is reliable and easily controllable and has a low energy consumption.

Financial information

The proposal focuses on the development of an emergency attitude control device for aircraft, to recover from the stall and spin condition: Stall and Spin Recovery System-SSRS.

Stall and spin are two critical conditions that may occur during flight, both events are due to the loss - symmetrical or asymmetrical – of lifting force over the lifting surfaces of the aircraft. The proposed system provides the generation of corrective forces - REGARDLESS of the aerodynamic conditions of the aircraft wing- that will bring the airplane in a secure flight attitude, if an early stall or spin condition has occurred.

This technical solution aims at dramatically reduce the accidents related to stall/spin/loss of control which are still the main accident cause in aviation.

The physical implementation of the security system proposed is obtained by one of the following solutions:
• A compressed air system: which releases, when appropriate, jets of compressed air from dedicated tanks).
• A monopropellant rockets system: which uses a gas (typically N20, hydrazine), which reacting with a catalyst, produces jets of gas at high temperature and pressure.

Although there are patents which aim to achieve similar goals, there are ideas that conceptually and technically resemble the proposed system. Although there are no directly competing systems, the anti-spin parachute traces part of the SSRS functionality. However, the proposed system has advantages in terms of:
• Increased safety
• Increased effectiveness
• Less weight
• Lower cost

As far as the market target, SSRS (through its different implementations) refers to the large, profitable market, mainly composed of:

• General aviation aircraft: not to high complexity, mainly pistonprop and light turboprop aircraft. The size of this segment is 259,200 aircrafts.
• Ultralight aircraft at high complexity (similar to aircraft pistonprop). The size of this segment (though difficult to quantify with accuracy) is 600,000 aircrafts.
• UAV unmanned aircraft. The size of this segment is 10,500 aircrafts.
• Regional turboprops (10,000 aicrafts)
• Large Jets

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