Team story
Origins
When the World Championship began, cars built by Emil Diedt had already won Indianapolis. Mauri Rose's Blue Crown Special had triumphed in 1947 and 1948; Bill Holland continued the sequence in 1949. These were American oval racers with Offenhauser engines and, in the celebrated Blue Crowns, front-wheel drive.
The Formula 1 journey
In 1950 Holland was second in the Blue Crown entered by Lou Moore, while Rose took third in a Deidt run by Howard Keck. Indianapolis then counted towards the drivers' World Championship: these podiums entered the championship statistics, unlike the earlier victories. The constructor's recorded appearances continued until 1952.
Historical timeline
Three chapters in the story of Deidt
Three episodes to revisit the people, cars and races that shaped this journey.
First appearance · Indianapolis 500
Bill Holland · Indianapolis 500 1950. The recorded position is P2; this number alone does not show whether the driver completed the race distance. This is the first recorded race start, or the first entry if the team never started a race.
Sporting landmark · Indianapolis 500
Bill Holland · Indianapolis 500 1950. The recorded position is P2; this number alone does not show whether the driver completed the race distance. This marks the first win or podium where one exists, otherwise the highest recorded placing for this constructor.
Latest recorded appearance · Indianapolis 500
Tony Bettenhausen · Indianapolis 500 1952. The recorded position is P24; this number alone does not show whether the driver completed the race distance. This is the last race start attributed to this constructor in the archive, not necessarily the end of the organisation behind it.
A distinctive way of racing
At Indianapolis the chassis builder's name did not necessarily match that of the entrant or sponsor. The 1950 podium illustrates this: two Deidts, two different programmes. Diedt's work belonged to American craft-based car construction, not to a team competing throughout the European Formula 1 calendar.
What remains
The Indianapolis Museum preserves Rose's winning Blue Crown. That example makes visible a history that began before 1950: the Speedway's honours and the championship record have different boundaries. Deidt's lack of championship victories does not erase the three consecutive wins its cars achieved in the great American race before the championship was established.