Hello all ...Lobaugh introduced the UP Challenger in 1939 ... run at the Treasure Island Fair in SF , on the UP layout ..a big hit . 1940 Lobaugh changes from open gearing to enclosed gear box ( not the post war clam shell).
Here is a Challenger from 1940-2 ...fresh from the west coast ...now living in the mid-west .
The engine suffered some damage in shipping so did some cleaning and putting back together ..oil etc ...ran quite as a lamb upside down on the bench for 20 minutes ...so naturally once on the rails it growls ..back to the bench before next steaming .
Not a bad ole gal for 80 ....