Minimum Radius for HO 2-10-2

[webbcompound]

Anyone know what the minimum viable radius would be for HO 2-10-2 (Bachmann, BLI) mikados and pacifics? I'm not concerned about what they look like as this would be behind the scenes trackwork.

[Joseph_Pestell]

Does it not say in the catalogue?

[Adrian Wintle]

Does it not say in the catalogue?

 

Not for BLI, no.

 

Some of the bigger Bachmann Steam has "Performs best on 22" radius curves or greater", but that doesn't mean that it is a minimum.

 

[webbcompound]

Thanks for this info. I didn't think of looking in the catalogue because the  Bachmann 2-10-2 isn't currently in production.

[Adrian Wintle]

Thanks for this info. I didn't think of looking in the catalogue because the  Bachmann 2-10-2 isn't currently in production.

I looked on the website at similarly large locos, not the 2-10-2 in particular.

 

Adrian

[Railtunes]

The basic rule of thumb for steam locomotive models is "TEN TIMES THE RIGID WHEELBASE". So, measure the total 5-axle driver wheelbase and multiply by ten. That's your safe minimum radius.

This rule of thumb is usually conservative, because most 10-coupled locomotive models - even brass models -  will have some side play or a "blind" driver on the center axles.

The other reason for this is the end swing on the pilot. The "10x" rule usually helps prevent too much coupler side swing which could derail any cars or helper engines coupled to the pilot.

Same for the tender connection and any allowance you would have to make for cab clearance on tight curves.

 

Hope this is helpful.

 

- Paul Ingraham