Pneumatic Belly Speed Brake Assembly for Rapid Airspeed Deceleration
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Solution Overview
Problem
Existing light sport aircraft lack effective means for rapid airspeed deceleration and enhanced flight control during low-speed maneuvers, particularly in STOL competitive events.
Innovation Solution
A fuselage-conformal belly-mounted aviation speed brake assembly actuated by a pneumatic actuator, which extends and retracts under pilot control, utilizing tension springs and a securement magnet for quick deployment and retraction, enhancing airspeed deceleration and flight control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a speed brake assembly is added to provide rapid airspeed deceleration, then airspeed deceleration capability is improved, but device complexity increases
Solution Approach 1:
The patent employs a pneumatic actuator system to extend and retract the speed brake panel. compressed air is stored in a reservoir and released through a valve to actuate the panel, providing rapid deployment and retraction without complex mechanical linkages or continuous power supply requirements.
Solution Approach 2:
The speed brake panel incorporates spring-loaded retractors that automatically return the panel to its retracted position when pneumatic pressure is released. The system uses its own stored energy (compressed air and spring tension) to perform the work of deployment and retraction without requiring external actuators for both directions.
2Loss of time
If a pneumatic actuator system is used for quick panel deployment, then response time is improved, but device complexity increases
Solution Approach 1:
Compressed air is pre-stored in a reservoir ready for immediate use. The system prepares the pneumatic power source in advance, eliminating the need for compression during actual deployment. When the pilot activates the speed brake, the pre-charged air immediately actuates the panel without delay.
Solution Approach 2:
The pneumatic actuation system is extracted as a separate, self-contained subsystem with its own power reservoir and control valve. This modular approach isolates the complexity of the pneumatic system from the main structural components, making the overall system more manageable and easier to maintain.
3Force
If tension springs are used for panel retraction, then retraction force is improved, but device complexity increases
Solution Approach 1:
Spring-loaded retractors are positioned to counterbalance the aerodynamic forces and weight of the speed brake panel. The springs are pre-tensioned to provide exactly the right amount of force to overcome the panel's resistance to retraction, creating a balanced system that requires minimal additional actuation force.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides improved low-speed flight characteristics and airspeed deceleration capabilities, making the aircraft more competitive in STOL events with enhanced pilot control and reliability.
Implementation Method 1
A pilot may choose to energize a speed brake pneumatic actuator that when during forward flight quickly and fully extends said panel against the oncoming airstream
Implementation Method 2
when said actuator is de-energized said panel is retracted by one or more panel retracting tension springs
Implementation Method 3
the panel is retained in conformal proximity to the belly of the fuselage by said tension springs and preferably by a panel securement magnet located on the rearward centerline of the upper surface of said panel that magnetically attaches said panel to an overhead ferromagnetic portion of said lower fuselage frame
Data Source
AI summary
An aviation speed brake assembly having a fuselage-conformal belly-mounted aviation speed brake panel and having a pilot controlled speed brake pneumatic actuator that a pilot may choose to energize to extend and to de-energize to retract said speed brake panel. The invention is particularly useful in effecting a modification of a preexisting experimental light sport aircraft that results in a more capable aircraft with improved low speed flight characteristics and improved airspeed deceleration capability.