User Manual


The Challenger type of locomotive would serve
until the end of mainline steam service. They were
assigned to railroads across the nation and under
all operating conditions gave a good accounting of
themselves. Two examples escaped dismantling. UP
3985 has been restored and joins UP 4-8-4 844 as
the only two steam locomotives operated by a class
1 railroad today. The other, UP 3977, has been on
display in North Platte, Nebraska since 1968 and has
recently been refurbished by a group of dedicated
(Alco) finalized the design of what was to become
one of the most widely recognized locomotives in
the world. In 1936, the first group of locomotives
with the 4-6-6-4 wheel arrangement was delivered
to the Union Pacific Railroad. They were an imme
-
diate success and their roster grew to number 105
locomotives on the Union Pacific alone. This new
wheel arrangement was given the name
“CHAL-
LENGER”. While the origin of the name is unclear,
it proved to be an apt moniker.
railfan volunteers.
In 1936, the Union Pacific Railroad and Alco
met the needs of increased speeds and tractive
effort with the design of the Challenger. Today, the
Genesis
TM
Challenger meets the needs of modelers
and collectors by providing an HO scale model that
captures all nuances of the prototype, taking model
steam realism to the next level.