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i would not give too much on the silence. the thing with deep noice is that you may hear it, but you can't say what direction it is comming from. the noise depends also on how the driver is doing his job.
i may also add that alot of the noice a tank is producing comes from the tracks and the suspension system.
if you wanna look for the most silent tank available, look for the leclerc. the hyperbar engine is like the abrams turbine, but has a better power output. it needs also less fuel and has an apu included.
where you have the 10 minutes value from? sounds like that stupid discovery channel thing. there is no vehicle available with such a propulsion, so where is that value comming from? and have you ever seen a 60t vehicle "sneaking"?
regards
axl
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