Folks, The Mike should do fine on the 33" or even a bit less. I have a
UP FEF 4-8-4 and it will run ( very tight however) on my one 36" radii
curve even though the engine was designed for 42". That one curve, like
all my mainline curves, is made with easements so the actual 36" part is
less than 1/3 of the 90 degree entire curve. I also have a complete
spiral circle at mostly 39" and it runs fine over that My guess would
be is that there three factors in engines making or not making a curve.
1) easements 2) driver wheelbase, 3) side to side movement of the
drivers. I do plan on opening up the side play on my Northern so it
will make the curves better--someday! The real railroads will also
grease the rail flanges on tight curves. I attended a talk one evening
given by a group trying to rebuilt a SP 2-10-2 here in Houston and the
statement was made that wherever a Mike could go the 2-10-2 could go--it
just had more lateral motion. When we all received our SHS 2-8-0's some
were concerned about the blind flanges. If you check the side play you
will find very little, perhaps meaning it probably needs them to run on
most track.
Bob Werre
ray wrote:
> >Any know what the Minimum radius would be for a USRA mike?
>
> I have operated the Overland 2-8-2 out of the box on a 33-inch radius
> s-curve without any problem..
>
> Re : If your engine is using all flanged drivers , I dont see how
> your able to make turns with 33 inch radius . I have an American Models
> 4-8-4 northern that
> is a bit longer that cant make a 36-inch radius.!
>
>
[Non-text portions of this message have been removed]
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