I am a person with a very active inner child. This is why my wife loves me so. Willoughby, Ohio - the home of the CP & E RR. OTTS Founder www.spankybird.shutterfly.com
Celebrating 18 years on the CTT Forum.
Buckeye Riveter......... OTTS Charter Member, a Roseyville Raider and a member of the CTT Forum since 2004..
Jelloway Creek, OH - ELV 1,100 - Home of the Baltimore, Ohio & Wabash RR
TCA 09-64284
brianel, Agent 027
"Praise the Lord. I may not have everything I desire, but the Lord has come through for what I need."
QUOTE: Originally posted by kdawg8762 What exactly is the difference in O and O27??
QUOTE: Regular O gauge Lionel track has a railhead height of 11/16 inch and a circle diameter of 31 inches. Wider radius O-72 is of the same profile, but with a 72 inch diameter. Track of the second profile, known as O-27, is formed from a lighter-weight steel and has a railhead height of 7/16 inch. A circle has a 27 inch diameter. Two wider radius versions of this track are also available from Lionel, O-42 and O-54. The two profiles were not designed to be mixed. They can be used together on the same layout, however, if the O-27 track is shimmed by 1/4 inch and the holes in the tubular rails are enlarged to accept regular O gauge pins. Generally, most O gauge equipment, except for the largest locomotives and passenger cars, will operate satisfactorily on O-27 track. And, with the exception of Lionel four-wheel-drive steamers made before 1948 and some early Marx units, most O-27 trains will work on regular O gauge track.
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