It was intended to demonstrate that the B-29 could still be put into service even if the first choice of engine, the air-cooled Wright R-3350 radial engine, ran into development or production difficulties.
Hal itu dimaksudkan untuk menunjukkan bahwa B-29 masih bisa dimasukkan ke dalam layanan bahkan jika pilihan mesin pertama, mesin radial Wright R-3350 berpendingin udara, ke pengembangan atau kesulitan produksi.