Boeing akatanga kushandisa injini iyi ari murwi akagadzirirwa zvakananga nokuda vatakuri akavhiyiwa, vachishandisa chete welded-chubhu fuselage namapapiro emapuranga-puranga sezvo nokuda Model 15, uye achiwedzera guru spinner kuderedza mhepo kumanikidza kumativi injini (ichi akadonhedzwa kugadzirwa). Armament akanga kana vaviri.30 mu (7.62 mm) pfuti, kana mumwe.30 mu uye mumwe.50 mu (12.7 mm); bapiro akanga pazasi attachments kuti anosvika mana 25 lb (11 kg) mabhomba, ndinoiitawo wechishanu aigona akarembera kubva fuselage.
migumisiro yemiedzo paFB-6