Bill Nielsen posted:SD locos were also usually longer than similar GP’s. What were the six axle GP versions called?
Bill in FtL
In the finest tradition by Lionel since the 1989 when they added 6-wheel trucks to their modified O Gauge so-called GP20 to make an equally so-called SDL39, they called any Flyer GP with 6-wheel trucks an SD.
And yes, an SD9 was not usually, but always noticeably longer than a GP9:
And before anybody asks, the SDL39 was purpose-built for one railroad only, the Milwaukee Road. All axles were powered:
Rusty