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Old 08-06-2005, 03:10 PM   #4
Uziel Gal
Legend
 
Join Date: Mar 2003
Location: Chingford, London, UK
MacDev Legion Air preset
Well, I know a few of you have been asking about this, and Bourke Grundy at MacDev has pulled through for me! Thanks Bourke, you've always been a great guy to deal with, and you haven't let me down.

So here we have it, performance specs for the MacDev Legion Air. The actual figures here are not for an on-gun application, so this won't read how my figures normally do, but I'll try and explain as I go. No re-charge rate trace graph to look at, but Bourke has always been honest with me in my dealings with him, so I'll take these results on face value.

Bourke stated: -

"The average full recharge of the Legion Air system is 8ms when recharging a volume of 200cc. I’m sorry but I do not have a graph, but as you may know, most guns require 30-80cc to cycle, so it is more than sufficient - as 8ms is less than most forward dwell times."

What we're saying here is that a marker will use between 30 and 80 cubic centimetres of air per shot, and so this is the amount of air that the regulator has to replace during the re-charge phase. In very simple terms, a high-efficiency, high-pressure marker will use less volume than a low-efficiency, low-pressure. In between you would find high-pressure, but inefficient markers, and low-pressure, high-efficiency ones. OK, things are a little more complicated than this, but you get the basic idea.

However, in MacDev's testing, they used the Legion Air reg to replace 200 cubic centimetres of air per cycle, rather than the smaller volume that a marker would require. It completed this re-charge cycle in just 8 milliseconds.

So, the take home message? The Legion Air regulator will re-charge in 8 milliseconds - faster than the Crossfire's 10 millisecond re-charge rate, which has for a long time been the benchmark against which other air systems have been compared. The Legion Air will also supply more than twice the volume of air that most markers require, within that 8 millisecond window. Certainly, there is no marker that would require more than 200 cubic centimetres per cycle. To supply that volume of air in such a short time, means that flow rate is very high, so shoot down isn't going to happen. Without a graph, it is hard to talk about reaction times, and pressure drop between shots, but with the whole cycle completed in 8 milliseconds, we can assume that reaction time is fast!

The assembled bottle lengths for the LegionAir are as follows: -

c. 45ci (0.7L), w. 2.1lbs (0.95kg), l. 10.4" (265mm), d. 3.7" (94mm)

c. 68ci (1.1L), w. 2.4lbs (1.1kg), l. 11.6" (295mm), d. 4" (100mm)

c. 91ci (1.4L), w. 3lbs (1.4kg), l. 12.4" (314mm), d. 4.5" (114mm)
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Last edited by Uziel Gal : 11-07-2005 at 01:20 PM.
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