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From: "Schuyler Larrabee" schuyler DOT larrabee AT verizon DOT net
Date: Mon, 21 Feb 2011 23:08:09 -0500
Subject: Overland Caboose trucks
"Overland_modified_truck_bolster_truck_swing_clearance-Resize.jpg" - image/jpeg, 1600x1200 (24bit)

Attached are three photos of the modifications Overland provided to correct
the truck/caboose step interference problems with their ERIE/EL bay window
caboose models.

In the first photo, I see that my recollection of the amount of offset is
not correct. The hole location is less offset than I mentioned (or
recalled). I wrote that the offset put the center of the kingpin hole on the
line of the edge of the truck bolster; it's not that far off.

In the second photo you can see that the truck swing only clears the steps
by a very small amount. The truck swing is limited not by the caboose
steps, but by the inboard wheel set striking the center sill of the car.

In the third photo you can see the offset between where the centerline of
the truck ends up, and where the carbody bolster would properly be (and is
on the model). In 3-D real life, this offset is barely noticeable and not
objectionable.

I'd like to make a note that the reason these models had a problem is that
they were accurate, perhaps a bit too accurate, if that is possible. Model
trucks are wider than accuracy would suggest, in part because the treads on
the wheels are MUCH wider than the prototype wheels. Model treads are .110"
wide; scale representation of prototype wheels would be (IIRC, this is
close if not right on) .066" wide. Reboxx and some other "scale width"
wheels are not actually correct at .088" wide, but they look very much
better, and will still operate on track laid to NMRA standards. Because
NMRA standards do not accurately model prototype track, actual scale width
wheels will not; the flangeways at turnouts will not hold the wheels in the
correct relationship to the opposite rails and derailments will occur.

If the trucks were scale width overall, using scale width wheels, then they
would have cleared the steps to begin with.

What I'm really saying is that I think Overland, rather than being beaten up
because they produced a model that had a clearance problem not noticed until
in the hands of the consumer, should be lauded for producing a model that is
dead-on accurate. It is the fault of the modeling mavens that established
"standards" that are do not permit accurate modeling to work on "standard"
tracks.

They should be further lauded for producing a fix, and delivering that fix
to those who acted in a timely manner. These cabooses have been out in the
real world for quite a few years now; if you bought them new and didn't act
on getting the repair parts to make them work correctly (provided free of
charge, IIRC) which was publicized as much as we could at that time, then I
don't think you have much of any basis for complaint at this much later
date.

Incidentally, I know that many measurements on these models are dead-on
correct. One one VERY COLD DAY I went to the D&H yards in Oneonta NY and
measured one of these cabooses, single-handedly, and about froze off my
hands and fingers, not to mention other (uh-HUH!) parts of my anatomy. I
then drew these cars up and sent the information to Overland, along with a
lot of photos.

SGL






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Overland_modified_truck_bolster_truck_swing_clearance-Resize.jpg

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