Home Page › Forums › Modeling the Missouri Pacific, Texas & Pacific, etc › HO Scale › Help with Mopac Spark Arresters details
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March 21, 2016 at 10:00 pm #5723peggyrothschildParticipant
I ordered a set of Shapeways MP spark arresters and am ready to add them to the Atlas MP15DC.
I’ve cut some fine brass wire mesh to drop into the openings on each side but was wondering if the wire was one piece that covered both sides or there were two seperate pieces – one for each side. I’m thinking it was two seperate pieces on the prototype. [attachment=2:8qhhmmet]image.jpeg[/attachment:8qhhmmet][attachment=1:8qhhmmet]image.jpeg[/attachment:8qhhmmet][attachment=0:8qhhmmet]image.jpeg[/attachment:8qhhmmet]March 23, 2016 at 12:47 pm #7850mopacKeymasterCharlie,
you have a PM
March 24, 2016 at 4:05 pm #7852alexortiz25ParticipantSomewhere I have slides I took of brand new arresters sitting on pallets outside the Ewing Ave diesel shop in St Louis, mid-70s. I’m pretty sure there were two separate sections of screen. I do not recall the screen bending over the top of the bar on top. Need to dig out my slides to verify, if I could remember where I put them oh so many years ago…
@cduckworth wrote:
I ordered a set of Shapeways MP spark arresters and am ready to add them to the Atlas MP15DC.
I’ve cut some fine brass wire mesh to drop into the openings on each side but was wondering if the wire was one piece that covered both sides or there were two seperate pieces – one for each side. I’m thinking it was two seperate pieces on the prototype.March 26, 2016 at 2:23 pm #7856madonnasuffolk30ParticipantCharlie,
The mesh screens were two separate sections. I’ve attached the diagram for the spark arrester and also a couple photos of MP2001. You can clearly see the two separate screen sections next to the rear most spark arrester on 2001. These were originally posted on the Mopac yahoo group, but I don’t recall who posted them to give them credit.
How do you like the Shapeways spark arrester parts? Can you comment on the accuracy compared to the drawing/photos? What mesh are you using?
Nate
April 14, 2016 at 6:03 pm #7869James PruittParticipantThis is really cool information. Thank you Nate for posting it.
I can make a photo etch kit for myself for these. Make it out of 0.004″ brass and solder it all together.
With that one screen laying on the top of the hood, it looks like the screens were slipped into the slot in the round conduit tube at the top and bolted to the bracket that is 4″ up from the bottom. The screens were not welded in place.
Brian
April 21, 2016 at 4:22 pm #7891John GaravagliaParticipantThey weren’t welded…Those were bolted to allow servicing without a cutting torch…and probably any necessary cleaning…a lot of oil showing on that unit!
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