The tandem undercarriage proved to be unsatisfactory and there were serious flight stability problems related to the delta wing, enough so that it never flew after an accident during taxiing tests.
Undercarriage tandem terbukti tidak memuaskan dan ada masalah stabilitas penerbangan serius yang berhubungan dengan sayap delta, sehingga tidak pernah terbang setelah kecelakaan selama tes taxi.