Kammala jumla mai zuwa: Sau hudu SCCA Road Racing Champion, Hansgen ya halarci biyu Formula One Grands Prix, 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. Shi ne
ya gama na 13 a wannan tseren. Ya sake yin tsere a can a 1965, a cikin MG-Huffaker-Offenhauser, lokacin da ya gama na 14.