Norm Charbonneau's O Gauge Layout

[bill937ca]

This is a fabulous 3-rail O gauge layout themed on the Pennsylvania Railway in the 40s and 50s.

 

 

 

[miyakoji]

I don't know what that 2-10-0(?) is in the third video, but I'd like to see the real thing get around that radius

[marknewton]

It's a model of an I-1s 2-10-0. I'm sure the real loco could get around a curve like that. With a lot of assistance from the re-railing gang! :)

 

Cheers,

 

Mark.

[kvp]

According to its datasheet:

http://www.steamlocomotive.com/decapod/?page=prr

"Of the five sets of drivers, only the first and last had flanges, which reduced the design's minimum curve radius."

I think that would make it a 2 axle loco on really tight curves, so if the rails could hold the axle load...

Edited October 22, 2016 by kvp

[marknewton]

I've seen a series of photos showing an I1 being rerailed on the PRR Elmira branch. It derailed after the track spread and the rails rolled under it on a sharp curve. Hence my comment about the rerailing gang.

 

The I1s were designed before the development of lateral motion devices,,which is why they had flangeless wheels. Later US designs used lateral motion devices on the leading and trailing coupled axles to reduce the rigid wheelbase.

 

Cheers,

 

Mark.

Edited October 23, 2016 by marknewton

[kvp]

Yes, the next 5 coupled axle type had moving axles on the outer two and no rims on the middle one instead of no rims on the middle three. The middle axle on the i1 had the tendency to move off from above the rails, putting increased load on the tracks through the other 4 and a nice side kick in the railhead when going back on the rail. In the worst case only 2 axles remain and that means 250% axle load and 2/5th traction, which makes wheelslip very likely. Still it's a nice, simple and strong locomotive.