The new engine " Jumo 211J1 " was ready, in the spring, 1940, therefore the group of designers of firm " Юнкерc " has urgently undertaken development of improved model Ju-87В for the installation of this engine which not only had the greater power, but also would allow to give an airplane "cleaner" aerodynamic forms. With the same purposes the cabin and fairings of a landing gear have been changed. Besides on an airplane have increased capacity of internal fuel tanks, have improved protection of crew and have strengthened armament. The lower part of a fuselage was strengthened and new pylons, for the suspension of bombs in weight up to 1800 kg are established. There were seven versions of modification Ju-87D - from Ju-87D-1 up to Ju-87D-8, including glider tug Ju-87D-2) and night attack aircraft (Ju-87D-7).