Category Archives: Trucks, Buses and Equipment

Mud Season is Upon Us at The Old Motor


So many of us take modern roads for granted that we forget about what driving was like on the unimproved roads back in the period. We have not, as The Old Motor has been situated on a scenic dirt road, much like the one above, for over twenty-five years in Vermont. Our Mud Season this spring has turned into a bit of a sport this year to even get up or down our steep hill. As this is being written, the road crew is pulling a stuck truck filled with fresh gravel out of the mud for the second day in a row.

In building a good road the topsoil first needs to be removed, and a base of fill material that can include gravel or small rocks for good drainage is laid down; without this preparation, a road is likely to turn into a sea of mud in the spring after thawing out, or after a period of heavy rain. This was the case with many of the roads across the nation at the time when the Lincoln Highway, the first improved coast-to-coast thoroughfare was promoted and built.

Charles H. Davis and the National Highways Association were also instrumental in working toward road improvements, but the Federal Highway Act of 1921 was one of the first on a national level to start the building of a good network of roads throughout the county. Secondary roads were the responsibility of towns and municipalities and were slowly brought up reasonable standards over a much longer period.

  •                    Mud2                             mud3

The enlargements above of the feature photo taken in 1920 show a Model “T” Ford Center-Door Sedan and an unidentified touring car on the road to Bothell, Washington, which is located Northeast of Seattle. We will leave it up to our readers to date the Ford, identify the touring car and tell us more about the Washington State license plates with a large white tag on the left hand side. The photo is courtesy of the Washington State Archives.


While looking for images of road building and equipment, a fascinating pair of photos were found that show three different internal-combustion engine-powered tractors being used for either road building or a railway bed in Washburn, North Dakota. Both images are large, detailed, and appear to be prints from glass-plate negatives so two enlargements of each one can be found below.

  •                     mud8                        mud9

The photos were taken in the mid-teens by William H. De Graff and the image above shows an unidentified brand of tractor that was likely kerosene-powered. It is pulling a Universal Road Finisher made by the Peoria Metal Culvert Co. that was operated by two men. This tractor and road grader appear to be finishing the center of the road and it is following the first two machines seen below, by using the three together each grading operation was completed in one pass.


The first tractor seen in the image above and possibly the second machine were Big Four Tractors made by the Emerson-Brantingham Co. that was located in Minneapolis, Minnesota. It was a huge 30-60 hp. four-cylinder unit featuring rear wheels that were eight feet in diameter. You can view a Big Four Tractor in action here. Photos of the two road building scenes are courtesy of

  •                     Mud5                       Mud6
Posted in Auto photos 1921 - 1942, Trucks, Buses and Equipment | Tagged , , , , , , , , , , , , , |

Moving The Metal – Part V

  • Mv1
  • A 1956 Ford F-750 “Big Job” hauling 1957 Fords

Many of the cars in today’s photos date from 1957, which was a significant year in many ways. Tail fins were approaching their peak. The new Chrysler torsion bar front suspension was unique in the domestic industry, as Packard returned to conventional coil front and rear leaf springs. Virtually all U.S. built cars had full ball joint front suspension, the last holdout being American Motors. The Ford Skyliner retractable hardtop also made its debut.

  • MV2      Mv3      MV4
  • A 1956 Dodge carrying 1957 Plymouths – A 1955 Studebaker Tractor hauling the company’s 1955 Pickups – A 1956 Dodge tractor hauls 1959 Ramblers

The horsepower race was in full swing. Chevrolet introduced their Rochester mechanical fuel injection unit for the 283 cubic inch small block V-8, the first successful system offered on an American production car. It was billed as the first engine that developed one horsepower per cubic inch, which certainly was the first one in a low-priced car.

American Motors tried a new Bendix electronic fuel injection system on their high performance Rambler Rebel, but it proved to be so troublesome that they were replaced with conventional four barrel carburetors before the cars ever made it to the showrooms. You can see parts I to IV of this series here. Photos courtesy of Dick Copello.

  • MV5
  • Note the unusual driven front axle on the Freightliner tractor

Posted in Auto photos 1946 - 1965, Trucks, Buses and Equipment | Tagged , , , , , , , , , , , , , |

Early Automotive and Aircraft Engine Dynamometer Testing


Part of automotive and aircraft engine manufacturing has always involved scientific testing to find power output. Once a baseline power output figure has been found, further tuning and changes can be tested and compared to it. Above can be seen a circa 1920 H6 Hispano-Suiza chassis on test, with each rear hub connected to a dynamometer. By adding the power figures together from each side, engineers were able to find out exactly how much engine power was lost by passing through the drivetrain. Photo courtesy of Isabelle Bracquemond.

Dyno2      Dyno3      Dyno4

The three photos above show the testing of Liberty aircraft engines. Part of accurate aircraft engine testing is to determine the amount of power lost at higher altitudes due to lower atmospheric pressure. The left and center photos above show a Packard Truck outfitted with a Liberty aircraft engine dynamometer.

By mounting the rig on the back of the truck and driving it to the top of Pikes Peak, accurate testing of power loss due to the height could be calculated. The center photo shows a turbocharger fitted for testing, with Dr. Sanford Moss an early expert on turbo and supercharging on the far right. The right photo photos shows an X-24 Liberty being tested. Follow the links to for more information.

Posted in Technical Features, Trucks, Buses and Equipment | Tagged , , , , , , , |