1915 Duesenberg Indianapolis Racer

After the First World War, the United States was anxious to return to racing. Engine displacement sizes were loosely regulated beginning in 1914 thus making the racing field more level. By 1920 the regulations were more strictly enforced in an effort to regulate the sport. Manufacturers found an advantage with the invention of forced induction.

In 1920 the displacement size was set at three liters for many races, including international events. The Targa Florio and the 500 Mile Sweepstake at Indianapolis were two such events with regulated engine sizes. For the 1921 season, the French Grand Prix at LeMans was added to the schedule.

In Europe, there were only a few marques that ventured race entrants. Among the list were the French Ballot, Sunbeam, and Peugeot. Peugeot's entrant at the 1920 Indy 500 Mile race was forced to retire after experiencing mechanical issues.

On stateside, the Duesenberg brothers were creating a straight-eight-cylinder racer. Their knowledge gained from their 1916 Indy 500 entrant was very valuable as the vehicle had finished in second and was a strong rival for the prized first-place crown. The outbreak of World War I had the brothers furthering their knowledge with the construction of engines for military purposes such as those for marine and aero.

The Duesenberg engines were made up of two blocks of four cylinders with each cylinder featuring two exhausts and one inlet valve operated by a single overhead camshaft. A shaft connected to the crank drove the camshafts. Horsepower was in the neighborhood of 115. This was an increase in horsepower by 15 over their road-going variants. A three-speed manual gearbox was used to send the power to the rear wheels. Most of the competition was using four gears which left the Duesenberg at a disadvantage. The top speed was around 110 mph which is very impressive. Imagine traveling in this vehicle on rough roads without seatbelts and in full exposure to the elements. The chassis is a ladder frame attached with live axles in both the front and rear with semi-elliptic leaf springs and friction dampers. The brakes were on the rear wheels.

The Indianapolis 500, known by other names during its early existence, was the highlight of the year during the early 1920s in International competition. For 1920 Duesenberg managed a third, fourth, and sixth-place finish. Their position would have been more fruitful if mechanical difficulties had not plagued their endeavors. When the checkered flag dropped it was the four-cylinder engined Monroe in first place.

For the 1921 season, the ban that forbids many European companies from competition had been lifted. Teams once again competed at LeMans and other stages that were convenient for the European marketplace. The Ballot automobiles were expected to be among the most dominant in the field. Their four-braking season had them at an advantage. Duesenberg modified their racers to use hydraulically operated drums, a first in racing history. Duesenberg became the first American company to enter a Grand Prix race.

Though the Ballots were the favorite, it was the Duesenbergs that held the crowd's attention. A fierce battle lasted throughout most of the race between Duesenberg and Ballots. Many had thought that the drivers of the Duesenbergs were only experienced with oval courses and would be incapable of competing on the rough European road courses. As the race continued many racers were forced to retire prematurely as the rough road surfaces claimed many vehicles. As the race progressed the roads only became more treacherous. Jimmy Murphy in his Duesenberg was leading the race with only a few laps to go when he was struck by debris and his tires were shredded. His radiator was pierced and his engine began to overheat. He managed to get his racer back to the pits where he used water to cool the engine. Much to the surprise of the crowd and the better judgment of most of his crew, he re-emerged onto the track. He coaxed his racer the additional 10.6 miles and crossed the finish line in first place. His car had averaged 78.1 mph and became the first American team to win a Grand Prix event. This would not happen again until the 1960s.

Following the season, Duesenberg continued their racing endeavors on United States soil. Victories occurred at the Indy 500 in 1922 and 1924. This was a true testament to the vehicle's capabilities and the ingenuity of the Duesenberg marque.

by Dan Vaughan

Boattail Racer

This is one of five team racing cars built between 1913 and 1916 by brothers Fred and Augie Duesenberg; this machine is the second oldest Duesenberg in existence. It was made primarily for championship races on high-banked board speedways, usually over a mile in length, constructed in numerous major cities around the country, including Chicago, New York, Cincinnati, Tacoma, and Uniontown, PA. Wilbur D'Alene drove this car to a second-place finish in the 1916 Indy 500.

This car is powered by a very unusual 300 cubic-inch 'Walking Beam' style engine, in which the overhead valves are directly activated by two-foot-long rocker arms. This innovative design became the standard for the Duesenbergs' competition cars before WWI and was later adopted for passenger car use. It develops about 100 horsepower at 2,500 RPM.

This racer was sold by the Duesenbergs to a young driver, Jimmy Benedict, who entered it in many 100-mile races in the summers of 1916 and 1917. It finished 5th at the Sheepshead Bay AAA 1,000 miles in October 1916. It raced throughout the Northeast between 1916 and 1921. After the hiatus in racing during WWI, Jimmy became a regular in numerous tracks in the Northeast. In 1921, Benedict sold the car to an ex-circus performer, Lou Hoyt, who used the car for performing stunts. After Hoyt's death in 1933, the car was stored away in a barn. Fred Roe and Charlie Fisher found the car in Hoyt's old barn in 1941. It was later owned by Alec Ulmann, Henry Austin Clark, and Robert Sutherland before passing into the hands of Josephy Freeman in 1994. The current owner gave the vehicle a full engine rebuild, including a new cast iron block.