It's a stack cover for being part of the reserve fleet. They just flip over the two sides to easily cover the stack for storage
I've never heard of spark arrestors on anything besides blower EMDs, and maybe some FMs when they were still around.
Perhaps these units were in storage until recently, and this is a remnant of a heavy duty stack cover?
Greetings from Alberta
-an Articulate Malcontent
Max KarlRecently, I had the chance to railfan the BNSF tracks. Many more Dash 9s are going by, and some of them have a newly added exhaust encasement. It does not appear to go by roster numbers, orders, or paint schemes. It looks like two panels and some struts on the front and rear of the exhaust. I don't think it is a silencer because the engines sound the same, maybe even louder. What is this?
I suspect it is some kind of device to prevent hot carbon particles and/or other exhaust material from starting brush fires. Pictures are not sufficiently detailed to make anything other than a guess.
Never too old to have a happy childhood!
Recently, I had the chance to railfan the BNSF tracks. Many more Dash 9s are going by, and some of them have a newly added exhaust encasement. It does not appear to go by roster numbers, orders, or paint schemes. It looks like two panels and some struts on the front and rear of the exhaust. I don't think it is a silencer because the engines sound the same, maybe even louder. What is this?
Max Karl, MRL and BNSF
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