This did surprise me. I wanted to take some photos of my (previously owned) SD40T-2, and with only the 0-27 loop up for running so far, I had no thoughts of running it. BUT: why do I try these things? Anyway, see for yourself! Instructions say it is rated for 0-31, but 0-27?
BandOBill
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Wow, that is fairly impressive! I see the engineer was taking it nice and slow - in case there was any problem.
Probably rated O-31 because it won't clear O-27 switch machines. That's the problem with most diesels. They'll run on tighter curves OK, but the switch machines are a different story.
I've also had a similar problem with Super'O' - large engines run fine thru curves, but have problems clearing switch tracks, if there is a turn in, or some just hit going straight.
BANDOB,
Thanks for sharing the video. 
Killian 
VETERANS HOME - NORTHERN CALIFORNIA
POW/MIA YOU ARE NOT FORGOTTEN
Will also throw tires more frequently on tight curves.
Probably rated O-31 because it won't clear O-27 switch machines.
That would certainly be my guess, as well.
I don't know who made the engine but they might have listed it as o31 because they don't make o27 track.
This is the one that surprises me:
It's a Lionel GG1 (18313, I think), and it even clears the switch machines as shown.
J White
I don't know who made the engine but they might have listed it as o31 because they don't make o27 track.
This is the one that surprises me:
...
It's a Lionel GG1 (18313, I think), and it even clears the switch machines as shown.
J White
That indeed may be the case. The MTH Premier Mikado was rated for O-42 but ran perfectly well through Atlas O-36 curves.
After I bought a used Weaver Alco C-630 I wanted to test it. The only thing I had set up that day was my Super Streets layout. I thought I could at least test it down the straight section......but I did not cut the power fast enough and it all but went through the turn!! Only when it hit a reverse curve did it have issues! But it did look AWFUL!!
hello guys and gals......
will a railking challenger go on 0-27 curves and clear the 0-27 switches ? I think it about 2 inches longer than the semi-scale GG1.
the woman who loves toy trains
Tiffany
In the backgeround of that video.....bet the GG-1 will not turn on the Super Street rails.
Tiffany a Challenger will run on 027 - I know mine does! What it wont do is take an "S" bend straight after a switch.
MIKE
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