Suppressor Auto Purge Channel Mitigates First-Round Pop
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Solution Overview
Problem
Conventional suppressors often produce a significant first-round pop (FRP) and fireball due to stored oxygen mixing with combustion gases, which can be detrimental for both civilian and military applications by making it easier for enemies to locate snipers.
Innovation Solution
The development of a suppressor with an auto purge system that includes a gas bypass channel parallel to the central bore, directing a small amount of combustion gas with high carbon dioxide content ahead of the bullet to mitigate the fireball, utilizing a funnel to guide gases into the channel and ensuring the gas moves faster than the bullet, thereby reducing the fireball and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional suppressor is used, then the suppressor structure is simple, but a large fireball and loud first-round pop occur due to stored oxygen mixing with combustion gases
Solution Approach 1:
The suppressor is divided into separate functional zones: a main suppressor body with baffles for noise reduction, and a separate auto-purge channel system for fireball mitigation. The auto-purge channel is bored through the suppressor body, creating distinct pathways for combustion gas flow that segment the overall function into noise control and fireball control components.
Solution Approach 2:
The auto-purge channel pre-positions combustion gases ahead of the bullet before the bullet exits the suppressor. By directing combustion gases through the auto-purge channel to accumulate at the muzzle end beforehand, the system creates a protective gas layer that prevents fireball formation when the bullet exits, addressing the fireball issue before it occurs.
2Object-affected harmful factors
If combustion gases are directed ahead of the bullet to reduce fireball, then fireball is mitigated, but the channel design must ensure gas moves faster than the bullet
Solution Approach 1:
The auto-purge channel has a smaller cross-sectional area compared to the main suppressor bore, creating a restricted passage that increases gas flow velocity locally. This localized geometric constraint ensures that combustion gases move through the auto-purge channel at speeds exceeding bullet velocity, achieving the required speed differential for effective fireball mitigation.
Solution Approach 2:
The system changes the flow parameters of combustion gases by directing them through a restricted channel geometry. The reduced cross-sectional area of the auto-purge channel increases gas velocity, while the channel length and orientation control the timing and distribution of gases ahead of the bullet, achieving the necessary speed and positioning parameters.
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
Effectively reduces the size and noise of the first-round fireball, enhancing operational security by minimizing the visibility and audibility of sniper activities.
Implementation Method 1
a gas bypass channel bored within the interior of the suppressor... directs a small amount of combustion gas with high carbon dioxide content ahead of the bullet
Implementation Method 2
utilizing a funnel to guide gases into the channel
Implementation Method 3
combustion gas with high carbon dioxide content... the deposited gas then expands to fill an area of the suppressor in front of the bullet... reduces the fireball
Implementation Method 4
reduce the decibel level of the shot... reduces the first shot fireball that is common with suppressors
Data Source
AI summary
A suppressor for reducing muzzle flash during firing of a firearm. The suppressor includes an auto purge channel configured to direct gas to a distal end of the suppressor adjacent an exit point of a projectile. In one example, the auto purge channel enables gas to saturate an area of the suppressor in front of the projectile. For example, the auto purge channel directs gas to the distal end of the suppressor at a speed that is greater than a speed of the projectile. In another embodiment, the projectile travels through combustion gasses transferred by the auto purge channel to reduce muzzle flash. In yet another example, the auto purge channel runs parallel to a central bore of the suppressor.