Shotgun Simulator Combustion Chamber Design
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Solution Overview
Problem
Existing methods to simulate a shotgun blast without using a shell are cumbersome, require long cycle times, and often necessitate a second person to launch training bumpers or dummies, while also generating significant recoil and incurring additional costs due to regulatory requirements.
Innovation Solution
A portable device that uses an inexpensive fuel and a tube with baffles to produce a shotgun-like sound, capable of launching training bumpers with low recoil, utilizing a piezoelectric igniter to regulate gas flow and ignition within a combustion chamber, eliminating the need for a shotgun or blank shells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy, cumbersome tubes are used to simulate shotgun blast, then the sound effect is achieved, but portability is difficult
Solution Approach 1:
The device is divided into separate components: a handheld launcher unit containing the combustion chamber and igniter, and separate training bumpers or dummies. This segmentation allows the sound-generating component to be lightweight and portable while the training targets can be independently handled or launched.
Solution Approach 2:
The invention replaces the traditional mechanical shotgun mechanism with a combustion-based system. Instead of using a heavy firearm, the device uses a controlled gas combustion reaction in a tuned combustion chamber to generate the acoustic shockwave that mimics a shotgun blast, significantly reducing weight and improving portability.
2Reliability
If previous simulation devices are used, then shotgun blast sound is produced, but cycle time is extended to 20-30 seconds
Solution Approach 1:
The device enables rapid successive blasts by using a combustion system that can be quickly re-ignited. The combustion chamber design allows for rapid gas replenishment and re-ignition, reducing the cycle time from 20-30 seconds to under 3 seconds, enabling continuous training scenarios with multiple consecutive blasts.
Solution Approach 2:
The invention uses a pneumatic combustion system where gas is introduced into the combustion chamber and ignited to produce the blast effect. This pneumatic approach allows for rapid refilling and re-ignition cycles compared to mechanical systems, enabling faster repeat firing.
3Ease of operation
If a second person or apparatus is used to launch training bumper, then the bumper can be launched, but device complexity and coordination requirements increase
Solution Approach 1:
The invention merges the shotgun blast sound generation and the training bumper launch functions into a single integrated device. The combustion chamber serves dual purposes: generating the acoustic shockwave for sound simulation and providing the propulsive force to launch the training bumper, eliminating the need for a separate launching apparatus or second person.
Solution Approach 2:
The combustion chamber is designed to perform multiple functions: it generates the shotgun blast sound effect through controlled combustion and simultaneously acts as a launch mechanism for training bumpers or dummies. This multi-functionality simplifies the overall system by eliminating the need for separate devices for sound generation and target launching.
4Reliability
If blank shells are used in a shotgun, then the shotgun blast sound is produced, but permit requirements and costs increase
Solution Approach 1:
The device creates a copy or simulation of the shotgun blast effect using controlled combustion of gas in a tuned chamber, rather than using actual shotgun discharge with blank shells. This simulated blast effect achieves the desired acoustic result without requiring a firearm, blank shells, or associated permits, simplifying regulatory compliance.
Solution Approach 2:
The invention changes the fundamental parameters of the system by replacing the mechanical firearm discharge mechanism with a controlled chemical combustion process. By using gas combustion in a specifically designed and tuned chamber, the system produces the desired acoustic shockwave without requiring a shotgun or blank shells, thereby eliminating permit requirements.
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 device achieves rapid cycle times comparable to a pump-action shotgun, reduces recoil, and eliminates the need for permits, providing an effective and cost-efficient means to simulate a shotgun blast while launching training bumpers.
Implementation Method 1
utilizing a piezoelectric igniter to regulate gas flow and ignition within a combustion chamber
Implementation Method 2
The article produces as shotgun blast using an inexpensive fuel and a tube comprising at least one baffle
Data Source
AI summary
A shotgun sound simulator comprises an elongated enclosed tube defining a combustion chamber into which an ignitable mixture can be combusted. The tube also includes at least one baffle and an open end having a smaller diameter than the tube. The open end permits ignited gases to escape. By controlling the ratios of the tube diameter (TI), the outlet port diameter (OP), baffle opening diameter (BH), combustion chamber length (CC); and the distance from the combustion chamber to the outlet port (RC), a simulated shotgun sound can be produced upon combustion of a gas in the combustion chamber. Conveniently, the outlet port can be made to receive a training bumper that is launched when the gas is ignited.