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Subject: Israel Has A Better Idea
SYSOP    2/4/2013 5:17:20 AM
 
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WarNerd       2/11/2013 3:17:58 AM
It turns standard infantry rifle into low cost OICW style weapon, right ? Sounds too good to be true.
All the comments on the MPRS I can find that reference the range talk about using it a ranges <100m. I suspect that this may be limit for the field of view for the sight unless it can pivot. This is the same effective range as the standard grenade launcher, just more accurate and with air-burst added.
 
The XM25 has a 400m effective range due to its higher velocity.
 
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Belisarius1234    Expansion and contraction.   2/11/2013 12:19:55 PM
Once the pulse expansion phase is over there will be an inrush of normal air. The mixing is quite VIOLENT.
 
 
 
 
 
 Note the pulse progression?
 
 B
 
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WarNerd       2/12/2013 5:24:52 AM
Once the pulse expansion phase is over there will be an inrush of normal air. The mixing is quite VIOLENT.
 
 Note the pulse progression?
Looks can be deceiving if you don’t pay attention to the physical mechanisms involved.
 
In an open air detonation of a FAE the fireball rises due to buoyancy, and air is sucked inward at ground level to create the ‘mixing’ you point to. Actually there is very little mixing because the rising fireball contains most of the reaction products and air just flows in under it as the fireball moves up. If enough fuel is present you can even generate a classic mushroom cloud. In a contained space, like a room, the gases cannot rise so this mechanism is not present.
 
The 2nd mechanism is from the sudden expansion and contraction of gasses in the fireball due to heat being generated and then radiated off. The thing is, it is the same gases moving back an forth, there is no mixing taking place except at the surface boundaries.
 
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