Aircraft Power Unit Layout for Integrated Landing Leg Placement
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Solution Overview
Problem
Existing aircraft designs face challenges in efficiently integrating functional parts like landing legs and power units without altering the conventional airframe configuration, particularly when propellers are of traction or propulsion types, limiting their placement and stability.
Innovation Solution
The aircraft incorporates a power unit with open upper or lower surfaces and internal spaces that accommodate functional parts, such as landing legs, allowing them to be positioned without rotating and without interfering with the propeller, thus enhancing flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If functional parts are directly attached to the holding part of the airframe, then the number of components is reduced, but the flexibility and efficiency of airframe configuration deteriorates
Solution Approach 1:
The holding part is divided into an upper holding part and a lower holding part, with the power unit positioned between them. This segmentation allows functional parts to be attached to different locations (upper or lower holding parts) depending on the propeller type, providing configuration flexibility while maintaining a compact integrated structure.
Solution Approach 2:
The airframe design accommodates both traction-type and propulsion-type propellers using the same basic structure. The power unit can be positioned with its open surface facing upward for traction types or downward for propulsion types, making the same airframe configuration universal for different propeller arrangements.
2Volume of moving object
If the propeller is of propulsion type with rotor blades at the lower part, then the structure is compact, but the placement of functional parts is limited and stability during landing deteriorates
Solution Approach 1:
The design utilizes the vertical dimension by positioning the power unit between the upper and lower holding parts. For propulsion-type propellers, functional parts can be attached to the upper holding part, effectively using the vertical space above the rotor blades to achieve stable landing leg placement without compromising structural compactness.
3Productivity
If functional parts are positioned near the rotor blades for compactness, then the structure is efficient, but the stability during landing deteriorates
Solution Approach 1:
By segmenting the holding part into upper and lower sections, the design allows functional parts to be positioned at optimal locations for both efficiency and stability. Landing legs can be attached to the lower holding part away from the rotor blades for stability, while other functional parts can utilize the upper holding part, achieving both airframe efficiency and landing stability.
Data Source
AI summary
To provide an aircraft having improved efficiency and flexibility of the airframe configuration when installing a functional part in the airframe, and a power unit having a configuration for the improved efficiency and flexibility. To provide an aircraft, comprising: a power unit having a first space open at least one of its upper or lower surface; a propeller having a first through-space and connected to the power unit; and a functional part having a predetermined function and located at least partially in an internal space formed by the first space and the first through-space.