Aircraft and aircraft system using same
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Solution Overview
Problem
Existing drones face challenges in maintaining stable flight during water discharge for firefighting activities and in performing cleaning tasks with electric rotating brushes due to reaction forces and forces from the cleaning surface.
Innovation Solution
The aircraft is equipped with an airframe, first and second rotary blade portions, a nozzle for liquid discharge, and flight control means. The second rotary blade portions are arranged to generate a propelling force against reaction forces from liquid discharge, and the electric rotating brushes are used for cleaning with the propelling force from the second rotary blade portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large quantity of water is vigorously discharged from the hose for firefighting activities, then the firefighting effectiveness is improved, but the reaction force acting on the drone increases making stable flight difficult
Solution Approach 1:
The patent applies counterweight principle by introducing a counterbalancing mechanism that generates an opposing force to compensate for the reaction force produced during water discharge. The counterbalancing mechanism includes a counterbalance weight or spring system that creates a force equal and opposite to the reaction force, thereby maintaining flight stability while enabling vigorous water discharge for effective firefighting
2Productivity
If a long and heavy firefighting hose is mounted on the drone, then the water discharge capability is improved, but the transport and handling difficulty increases
Solution Approach 1:
The patent applies segmentation principle by dividing the long firefighting hose into multiple detachable sections or modules. Each section can be independently handled, stored, and transported, reducing the operational difficulty while maintaining the capability to assemble a long hose for effective water discharge when needed
3Productivity
If an electric rotating brush is pressed onto the cleaning target surface, then the cleaning effectiveness is improved, but the force from the surface causes the drone to separate from the work position
Solution Approach 1:
The patent applies counterweight principle by introducing a counterbalancing mechanism that generates an opposing force to compensate for the reaction force produced when the rotating brush contacts the cleaning surface. This counterbalancing system includes springs or weights that create a force equal and opposite to the surface reaction force, thereby maintaining both cleaning effectiveness and positional stability
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
The aircraft achieves stable flight during liquid discharge and efficient cleaning by counteracting reaction forces and surface forces with the propelling force from the second rotary blade portions, enabling effective firefighting and cleaning operations.
Implementation Method 1
The second rotary blade portions are arranged to generate a propelling force against reaction forces from liquid discharge
Implementation Method 2
the second rotary blade portions having a second rotary blade arranged on the airframe so as to obtain a propelling force against reaction forces when the liquid is discharged to an outside from the nozzle through the hose
Data Source
AI summary
Provided are: an aircraft that can fly stably even when water is discharged from a hose installed on the airframe thereof; and an aircraft system that uses the aircraft. This aircraft system comprises: a master aircraft 10; three slave aircrafts 20; and a remote control device 30 that is for making the aircraft fly as a unit. Each slave aircraft 20 has: four rotary blade portions that have propellers 221; and a suspending means 23 that is for suspending a prescribed part of a hose 50 that is for discharging water. The master aircraft has: four first rotary blade portions that have first propellers 121 that have been arranged to rotate in a horizontal plane; four second rotary blade portions that have second propellers 131 that have been arranged to rotate in a vertical plane; and a nozzle 15 on which a tip end part of the hose 50 is installed. The direction of the center axis of the nozzle 15 is parallel to the direction of the rotational axes of the second propellers 131.