Posted by cnw4007 on August 26, 2016 
I see our Russian friends have Alco's too !
Posted by bradley on August 27, 2016 
Tier 4?
Posted by Szymon Siedlecki on August 27, 2016 
Hmm I'm not following you guys. What you mean that "they have Alco's too" ?
Posted by cnw4007 on August 27, 2016 
Tier -5
Posted by cnw4007 on August 27, 2016 
Alco's in the US tended to smoke like a steam engine like this locomotive. It was from turbo lag and unburned fuel pooling in places it should not have. When they up the RPM's the fuel burns off but with not enough oxygen.
Posted by Steve Raith on August 28, 2016 
ALCO (American Locomotive Company) locomotives were known for making thick black smoke.
Posted by bradley on August 28, 2016 
Szymon, Alcohol was a US company that built diesel locomotives, that has since ceased operations. Their engines were known for exhausting out black smoke. My comment on " tier 4" is in reference to laws in the US governing exhaust emissions. Tier 4 is the latest level, which basically is to prevent any visible exhaust (soot)
Posted by Andrew Milwee on August 29, 2016 
Szymon, Alcos are an American locomotive company whose diesels were notorious for their smoke when under turbo lag.
Posted by Szymon Siedlecki on August 30, 2016 
Oh I see, thanks guys.
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