The programme was delayed waiting for appropriate engines and the B-5 was not completed until 1947, it only made a few short hops before the programme was abandoned due to vibration and structural flexing.
Program ini ditunda menunggu mesin yang tepat dan B-5 belum selesai sampai 1947, hanya membuat beberapa hop singkat sebelum program itu ditinggalkan karena getaran dan meregangkan struktural.