Diesel Trucks
Blomberg Trucks
AAR Type A
The AAR Type A switcher truck has an 8 foot wheelbase. It is double equalized with drop equalizers. They are equipped with journals. GSC made the majority of these, though they cast some with the Alco logo on them. Adirondack did make some later versions of it.
The AAR Type A switcher truck was used by EMD, Baldwin, Alco, Lima, and Fairbanks-Morse on various models. Pennsy engines equipped with AAR Type A trucks included Alco S-3, S-4 and T-6, Baldwin VO660, VO1000, DS-4-4-600, DS-4-4-750, DS-4-4-1000, S-8 and S-12, EMD SW, SW1, NW2, SW7, SW900, SW1200 and Fairbanks-Morse H-10-44 and H-12-44.
Patent 2,137,074 provides detailed drawings and description of the AAR Type A Blomberg trucks.
AAR Type A Truck
AAR Type A end on flatcar Salt Lake City, UT, October 1991. Photo by Don Strack.
AAR Type A Trucks for 3/4 inch scale SW1500
AAR Type A truck in 1-1/2 inch scale by MDM Locomotive Works
AAR Type A trucks in 1-1/2 inch scale by Boston Locomotive Works.
AAR Type B
An AAR type B truck from an ALCo locomotuve of A&M. Photo by Mike Condren.
AAR Type B power trucks in 1-inch scale, 4-3/4 inch gauge, by Despatch Railroad Products LLC.
Alco AAR Type B truck frames in 1-1/2 inch scale cast in ductile iron.
Alco AAR Type B truck frame cast in zinc.
Blomberge
AAR Type B Trucks
Six Wheel
U.S. Patent 2,189,125 provides detailed drawings and description of the Blomberg six-wheel truck.
EMD Radial Steer
Overview of EMD's patented Radial Steer truck.
GM HTC
- This is the same blueprint that Lee Wright used to build the incredible SD locomotive HTC trucks for his world class 7.5" gauge Electromotive diesel locomotives. Lee sold me this drawing and said; "If you ever want to build a GM SD locomotive, you will have to use this blueprint".
- It has incredible details of the three-axle HTC trucks as used on the iconic locomotives of the GM SD locomotive line of the 1970's, 80's and early 90's. I believe these were first sold on the new in 1972 on the SD-40-2 and they were the trucks to have all through the SD-60's until the HTC-II arrived on the SD-70's with its steerable features, and great complexity.
