goofy8275 said:Train wheel!
If so, I'm unable to post a new challenge.
Send from my iPad using iPF.net
Correct Goofy. It's one of the driving wheels of the Empire State Express, a steam locomotive that once held the land speed record in the late 19th Century.
As per Goofy's instructions, the challenge is opened to any iPF member who wishes to post the next challenge.