Germany's swept wing research was also obtained by the Swedish aircraft manufacturer SAAB, with the help of ex-Messerschmitt engineers that had fled to Switzerland during late 1945.[79][80] At the time, SAAB saw the need to make aeronautical advances, particularly in the new field of jet propulsion.[81] The company incorporated both the jet engine and the swept wing to produce the Saab 29 Tunnan fighter; on 1 September 1948, the first prototype conducted its maiden flight, flown by the English test pilot S/L Robert A. 'Bob' Moore, DFC and bar,[82] Although not well known outside Sweden, the Tunnan was the first Western European fighter to be introduced with such a wing configuration.[83][84] In parallel, SAAB also developed another swept wing aircraft, the Saab 32 Lansen, primarily to serve as Sweden's standard attack aircraft.[85] Its wing, which had a 10 per cent laminar profile and a 35° sweep, featured triangular fences near the wing roots in order to improve airflow when the aircraft was being flown at a high angle of attack.[85][86] On 25 October 1953, a SAAB 32 Lansen attained a Mach number of at least 1.12 while in a shallow dive, exceeding the sound barrier.[86]