The Revell HO Index

SW7 Locomotives

Introduction

Dynaglide diagramRevell SW7 locomotives were produced with two different drive mechanisms.

The earliest, dubbed "Dyna Glide," used a chassis mounted motor that drove a shaft that contained a centrifugal clutch and a flywheel.  Power was transmitted to the truck via a belt drive located between the two axles of the truck which drove worm gears inside the truck.  Only 1 truck was powered so only 4 wheel drive was provided. 

Later models used a more conventional 8 wheel drive with a truck mounted motor which drove the worm gears within it via a spur gear.  Power was transmitted to the other truck by means of a universal shaft.  This drive closely resembled the Varney drive of the time which is not surprising as Revell and Varney were under common ownership at this time

Deluxe locomotives generally came with human figures and added detail.  

T3550 Union Pacific SW-7 - 1956 (Dyna-Glide)
 

T3551 Southern Pacific SW7 - 1959 ( 8 Wheel Drive)
T3570 SW7 Switcher
 

T3552 New Haven SW-7 - 1959 ( 8 Wheel Drive)

 

T3553 Santa Fe SW-7 - 1959 ( 8 Wheel Drive)

 

T3554 ACL SW-7 - 1959 ( 8 Wheel Drive)
 
 

T3560 Union Pacific SW-7 Deluxe - 1956 (Dyna-Glide)
 
 

T3570 ACL SW-7 Deluxe - 1956 (Dyna-Glide)
T3570 SW7 Switcher
 

T3571 Southern Pacific SW7 Deluxe - 1958 (Dyna-Glide)
Illustration from 1958 catalog and appears to be a deluxe engine with number board, though wrong number, and fireman figure showing.   Also catalog predates introduction of 8 wheel locomotives in1959