Lego City 7939 Customize Locomotive with 2nd Trainengine - Lego Speed Build Review

Lego City 7939 Customize Locomotive with 2nd Trainengine
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Do you know the Problem pulling a long Train with only 1 standart Locomotive!!!
Especially on curvy tracks, that will gain traction problems on the Locomotive!!
Of course you can solve the problem with a second Locomotive, but
in this video i will show you, how you do this with only 1 Locomotive but with an extra Trainengine!!!!

Have Fun!!!