HO scale models are built to 1:87th scale. This simply means all the dimensions of the full size item (the ‘prototype’) are divided by 87. So 87 models all lined up would be the same length as the prototype. 87 stacked up would equal the height of the prototype. To put it another way. HO is also known as 3.5mm scale. 3.5mm on the model represents 1 foot (12 inches) on the prototype or full size item. HO scale actually stands for Half O. See the O scale entry for more information. HO trains run on a 16.5mm gauge track.

AMRA WA Club Monthly BBQ

January 30, 2021 5:30 pm
to January 30, 2021 8:00 pm
Share in our monthly social BBQ with the AMRA Community. Enjoy our club layouts, have a few laughs and ask the experts in your model hobby questions. New and non-members...

Denver, Santa Fe and Valentine

The layout is built to HO [ 1:87]  standards [3.5mm/ft scale on 16.5mm gauge track] Alan Burrough and Craig Hartmann are the Layout’s Coordinators This layout is a ‘work–in–progress’. Our Branch’s original...
Ansbach - Platform area being prepared - 01 with first wagons already there

Ansbach Branch

Ansabach Branch is a HO scale layout based on a German prototype[HO [1:87] scale = 3.5mm/ft models running on 16.5mm gauge track]Dave Edgell is the Layout Coordinator As our Branch...