I know this is an old topic and tired topic but I would like to solve my dilemma one way or the other.
I made the decision to go O Scale from running Semi-Scale knowing there would be restrictions on what I could run. It has been a good decision in my mind. I am also a recovering engineer so my brain will not let technical things go so I am hoping some of you have experience that I don't.
I currently run 031 Fastrak figure eight on my floor layout. I am satisfied with running 60 foot MTH and K-line "short scale" passenger cars however there are a few MTH locomotives I would like to get which specifies 042. I am assuming the 042 refers to tube track so 036 Fastrak approximates 037.5 in tube track vernacular. I do not run express trains rather scale 20-30 mph so I am hoping the lack of 4.5 inches in diameter may work? I really cannot go to the 042 track due to floor limitations.
A specific example is the MTH P47 Blue Comet. MTH specifies 042. I would rather not buy one only to find 036 Fastrak falls short.
What are your thoughts?