HOn3 Track Parallel spacing straight and curved.

[rgengineoiler]

HI all;  The railroad room is a mess as I tear Down the N Layout.  I'm saving the bench work.  My question is the parallel track spacing for HOn3 Steamers and freight cars of the 1930's
and up.  I bought two NMRA HOn3 Mark III gauges but am skeptical because my old N scale gauges were wrong at times and then double stacks came out and would not fit in my tunnels. 
That did it and I started taking down the N layout and now I am glad I did.  I am stocking up on all needed Items for the new HOn3 layout.  I would appreciate the heads up on the parallel
track spacing for my planning.  DR   

[Hawghead]

The standard "norm" for HO is 2" on center, the NMRA states 12' on center for narrow gauge which works out to 1.65".  As near as I can tell from the 1919 valuation maps for the RGS it looks like they used a 10' on center which would be 1.37"  I went with 1.75 as a compromise between looks and being able to get fat fingers in there when the need arises.  I don't have any curved parallel track on my track plan so don't have to worry about side swiping.  If I were you, I'd draw a couple of curves, tack down some flex track and check the clearance you need with your longest equipment.

Scott

[rgengineoiler]

Thanks for the info I needed Scott.  DR