Saab Ursaab

Ursaab (lit. Proto-Saab), also known as 92001 and X9248, was the first of four prototype cars made by Saab AB, which at that time was solely an aeroplane manufacturer, leading to production of the first Saab car, the Saab 92 in 1949. The car is now in the Saab Car Museum in Trollhättan. The name "Ursaab" means "original Saab".

The model was developed by a 16-person team led by engineer Gunnar Ljungström and designer Sixten Sason.

Design

An automobile design project was started in 1945 by

Development was started in Linköping by a 16-person team led by engineer Gunnar Ljungström and designer Sixten Sason.^[4] The immediately preceding Saab production code was for an aeroplane - the Saab 91 Safir. It was for this reason that the first car project was called the Saab 92. Normally the development would have been handled by the testing workshop, but it was busy with the Saab 91 Safir and the Saab 90 Scandia. Thus the tool workshop, which had a lighter workload at that juncture, was given the assignment.

The engineers responsible for making the

Because the car had to have a very low drag coefficient,0.3, which even today is considered very impressive, aerodynamic tests were part of the early evaluations. Thus, the body was of novel design and, with safety in mind, it provided damage-resistance in the event of an accident. Winter driving capability was enhanced via front-wheel-drive and wide wheel arches which allowed for snow accumulation without obstruction of the wheels.

Construction

Using some carpenters from Motala, a full size mock-up in alder wood was built in the spring of 1946. The model was coloured black using shoe polish. Some extra workers were recruited from Thorells Kylarfabrik in Linköping for building the steel body. Hand-shaping the 1.2 mm thick steel sheets proved to be difficult work. By summer 1946 the first prototype body was ready, hand beaten on a wooden jig. Shaping of the metal was done in Saab's secret factory 30 metres below ground.^[5]

The colour was a problem - the Managing Director wanted it painted black, but the vice MD wanted it blue. But the workshop had already purchased black paint, making it a moot point. The SAAB paint workshop did not have the capacity to handle the paint job so the builders contacted Aktiebolaget Svenska Järnvägsverkstäderna (ASJ), the Swedish railroad works in Arlöv. This firm was experienced in painting railway cars and buses. Having been told that their assistance was needed in painting a car, the company was initially reluctant to help since it was thought that the vehicle was a management car such as a DeSoto or something that would take a lot of time. However, when it was learned that the vehicle was a prototype of a new car, ASJ quickly took the job.

The prototype had a borrowed 13

Ursaab was driven over 530,000 kilometers (330,000 mi), typically in utter secrecy, and usually on narrow and muddy forest roads and in early mornings or late nights. Today it is in the Saab museum in Trollhättan, with a cleaned grille and more roadworthy headlights. The name "Ursaab" means "original Saab".

The Ursaab design was improved by Sixten Sason in 1947, resulting in another prototype: the 92002. The most remarkable difference between 92001 and 92002 is the hood (bonnet). The earlier hood design and the use of a hood mechanism from an Opel Kadett made removal of the engine difficult, as one would have to turn it 90 degrees and bring out the drive package with the gearbox first. Inspired by American cars that had cascading front-ends, the redesigned hood allowed for improved access to the engine bay. After an additional four prototypes the design was ready for production as the Saab 92. Ursaab was first shown to the press on June 10, 1947 at Saab AB's headquarters.^[6]

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