Although the XH-20 flew successfully the ramjets were noisy and burnt a large amount of fuel and plans to build a larger two-seat XH-29 were abandoned.
Meskipun XH-20 terbang berhasil dengan ramjet yang berisik dan membakar sejumlah besar bahan bakar dan rencana untuk membangun XH-29 yang lebih besar dua-kursi ditinggalkan.