1948, the Y6 b all so has a 2 wheel trailing truck. From what I have read here, the PK steam engines do not pull great. Far as deatil, one of the reasons I never bought a PK Y3. My LHS has one so I have seen one in person. It’s detail seems to be lacking compared to the Y 6. It may very well be accurate, but looks a little bland when compared.
Stryker sorry I did not get the pictures taken today. I felt like Caboose today.
The BLI Y6B wont disappoint for sure. It will work on 18 inch radius and pulls like a mule. It’s a heavy one since the boiler is made of cast and not plastic like the other BLI’s. I think the reason it tracks on tight track so well is the size of the drivers. They seem short in comparison with the other loco’s mentioned. This gives it good torque but also allows the wheels to be closer and shortening the wheel base of the 2 articulated driver sections.
Here’s 2 pics of mine on a 22 inch curve which isn’t far off of an 18.
If you have the Broadway limited one there is a black piece of foam in the front between the boiler and truck that has to be removed. There is a technical bulletin on it. If you don’ remove it the front section will not move freely and derail. I found out the hard way.
Here’s a link to the tech bulletin with pics of the foam.