Simpleplanes - working walschaerts valve gear

[@Khalyx_2014]

My eyes need clearing now

[@MrDingDongidk]

Huh. I've played simpleplanes for a very long times and I never knew there train in the game

[@XTARSAGENCY]

This is cool and all but
HE PUT THE REVERSE GEAR WHILE IT WAS MOVING FORWARD

[@WinterroSP]

This was fixed shortly after. The part that ran the code was placed backwards