My Mark Rollins Class A Climax needed a spark
arrestor. The problem was finding some material that looked right
for the wire screen. The answer came in the form of a Mr. Coffee
permanent coffee filter that was left over from a defunct coffee
maker. Ive looked at some others as well, and some brands seem to
be made from a sheet of thin metal with small holes punched in it.
The Mr. Coffee (and my current Krups) filter is a
finely-woven wire mesh just right for HO. There is enough
material in one such filter for all the spark arrestors one could ever
want to make!
||I started by cutting a strip from the filter material it is
quite easy to cut with scissors and to follow along the mesh for a
straight cut for the cylindrical body of the arrestor. I
overlapped the ends slightly and glued with gel ACC, using my
tweezers for a clamp. Next came the solid metal bands, made from HO
scale 1x4 styrene strip. This arrestor is about 0.5 inch (12mm)
outside diameter; for a smaller one, a scale 1x2 might work
well. I wrapped the strip around the wire body at the top and
bottom of the cylinder and secured it with ACC gel, again using the
tweezers for a clamp. The photo shows a piece of the Mr.
Coffee filter material and the styrene 1x4 strip as well.
|To finish the cylinder, I cut four short strips of the styrene 1x4
and placed them vertically at 90 degree intervals.
For the top, I traced the outline of the cylinder onto the Mr.
Coffee mesh and cut a circle with the scissors. The problem was:
how to neatly secure the top to the body? The solution is shown at
right. I fitted a strip of the 1x4 styrene inside the cylindrical
body, overlapping the ends slightly, and glued it with
ACC. Then, I glued the resulting circle on edge to the circular
||When dry, the cap fitted into the body very neatly, as seen at
|A coat of Polly S 'Grimy Black' finished the project, and the
photo at right shows the result.
|Mr. Coffee permanent filter (Krups has a
|HO scale 1x4 inch styrene strip|
|ACC gel cement|
|Polly S 'Grimy Black' paint|
I liked my spark arrestor for the Climax so much that I decided to
try the same technique on a new one for my 'Americanized' Egger-Bahn.
This time I cut a styrene disk that just fit inside the top of the
cylinder, then cut a slightly larger wire mesh top. I glued the
mesh to the disk, then fitted the disk into the cylinder with a couple
of dabs of ACC. I also ACCed a plastic peg to the underside of the
disk to hold the arrestor in place on an Egger-Bahn smokestack.
||The Climax arrestor and this new smaller one
|The underside, with peg and disk
||The new arrestor, still not painted, on an AHM Baldwin
Photos copyright © 2005 John Hubbard