Electric reaction control system

Patent metadata

Field	Value
Publication number	US-11697491-B2
Application number	US-202017038893-A
Country	US
Kind code	B2
Filing date	Sep 30, 2020
Priority date	Nov 30, 2018
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

An electric reaction control system that can selectively expel a “burst” or “puff” of air to alter the orientation of the aircraft during flight. An aircraft incorporating ducting, an air compressor, an electric motor, and a plurality of nozzles can facilitate in-flight trajectory modifications. When an air burst is needed to provide thrust for the purposes of reaction control, nozzles are selectively opened and closed to provide roll, pitch, and yaw of the aircraft. The ERCS can facilitate an electric aircraft that would be very agile and very light, utilizing electric power, as opposed to jet power.

First claim

What is claimed is:

1. A minimum lag-time electric reaction control system, comprising:
an aircraft having air ducting configured to control pitch, roll, and yaw, disposed within the aircraft;
an air compressor and an electric motor operably coupled to the air ducting;
a plurality of nozzles disposed along pitch, roll, and yaw axes at extremities of the aircraft operably coupled to the ducting and configured to selectively expel a burst of air to alter the pitch, roll, and yaw orientation of the aircraft during flight; and
a flight control computer configured to generate signals to vary timing, duration, and sequence of the burst of air from each of the plurality of nozzles,
wherein a nozzle is located on the port side or the starboard side of a vertical fin.

2. The electric reaction control system of claim 1 , wherein each nozzle includes an aperture that controllably varies in size.

3. The electric reaction control system of claim 2 , wherein the flight control computer is configured to control the size of the aperture.

4. The electric reaction control system of claim 3 , wherein the flight control computer is operably coupled to an input device.

5. The electric reaction control system of claim 1 , further comprising an air compressor operably coupled to the ducting and configured to pressurize air in the ducting.

6. The electric reaction control system of claim 5 , wherein the air compressor is a centrifugal air compressor.

7. The electric reaction control system of claim 6 , wherein the air compressor is an axial air compressor.

8. The electric reaction control system of claim 1 , wherein the nozzles are located on opposite sides of a wing tip.

9. The electric reaction control system of claim 1 , wherein the nozzles include pitch, roll, and yaw nozzles.

10. The electric reaction control system of claim 1 , wherein the nozzles are located near the fore and aft ends of the aircraft.

11. A minimum-lag method for controlling the orientation of an aircraft, comprising:
generating an air pressure in an aircraft air duct configured to control pitch, roll, and yaw;
receiving input related to the pitch, roll, and yaw orientation of the aircraft; and
regulating expulsion of a burst of air through one or more nozzles by receiving control signals from a flight control computer to vary timing, duration, and sequence of the burst of air from each of the plurality of nozzles operably coupled to the duct to alter the orientation of the aircraft during flight,
wherein the aircraft's yaw is controlled by expelling a burst of air from a nozzle located on the port side or the starboard side of a vertical fin.

12. The method of claim 11 , wherein the aircraft's pitch is controlled by expelling a burst of air from the nozzle located near the fore end or aft end of the aircraft.

13. The method of claim 11 , wherein the aircraft's roll is controlled by expelling a burst of air from the nozzle located on the top of a wing tip on the starboard side and the bottom of a wing tip on the port side or the top of a wing tip on the port side and the bottom of a wing tip on the starboard side.

14. The method of claim 11 , wherein the nozzles include pitch, roll, and yaw nozzles.

15. The method of claim 11 , wherein each nozzle includes an aperture that controllably varies in size.

16. The method of claim 15 , further comprising controlling the size of the aperture via a flight control computer.

17. The method of claim 16 , wherein the flight control computer receives data from a user input device.

18. The method of claim 11 , further comprising pressurizing air in the ducting via an air compressor.

19. The method of claim 18 , wherein the air compressor is a centrifugal air compressor.

20. The method of claim 18 , wherein the air compressor is an axial air compressor.

Assignees

• Textron Innovations Inc

Inventors

• Fenny Carlos
• Kim Sung
• Campbell Kip
• Choi Jouyoung Jason

Classifications

• B64C29/0016

  the lift during taking-off being created by free or ducted propellers or by blowers · CPC title

• B64C15/14 Primary

  the jets being other than main propulsion jets (jet flaps B64C9/38) · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• Y02T50/10

  Drag reduction · CPC title