Bingo!
I've bolded & underlined the sources that caused my confusion. Thanks for explaining it out jetrock!:thumb: bounce7
jetrock said:Part of the confusion, which appears to reappear, is that there were TWO different "OO" scales. The American OO was 1:76 scale with 1:76 scale track. British OO is 1:76 scale with 1:87 scale track, done so small British prototypes could fit the available electric motors. HO was originally British, half of British 1:43.5 O scale (1.25" real-world equals 4'8.5" in British O scale.) American O scale is traditionally 1:48, and runs on 1:43.5 scale track (1.25" real-world equals 5' in American O scale.)
In case your head doesn't hurt enough, there is a fine-scale British OO that runs on 16.5mm track (4'8.5" at 1:76) and a fine-scale American O (Proto:48) that runs on track that runs on two-rail track approx. 1.17" (4'8.5" in 1/48 scale.)
I'm not even going to touch narrow gauge...
I've bolded & underlined the sources that caused my confusion. Thanks for explaining it out jetrock!:thumb: bounce7