Rubuta ci gaba don wannan sakin layi - Sau hudu SCCA Road Racing Champion, Hansgen ya shiga cikin Formula One Grand Prix guda biyu, wanda ya fara a ranar 8 ga Oktoba, 1961, a Watkins Glen, New York. Ya zira kwallaye biyu a gasar zakarun Turai. A cikin 1964 ya yi tsere da MG Liquid Suspension Special, motar Offenhauser-powered, don Kjell Qvale, a Indianapolis 500. Ya gama na 13
a cikin wannan tseren. Ya sake yin tsere a can a 1965, a cikin MG-Huffaker-Offenhauser, lokacin da ya gama na 14.