Since the Mig-29A were in service,the limited fuel capacity was the biggest problem of this light tactical fighter.To meeting the specified range requirements,the designers of Mikoyan developed a project to enlarge the fuselage tank.But the special dorsal auxiliary air intakes cause that only the tank in the spine could be readily enlarged;its capacity was increased by 240 litres.The enlarged fuselage tank made the upper fuselage contour became convex instead of concave.Besides,the application of new pylons allows another two drop tanks be fitted under the wings.Fitting three drop tanks gave the fighter a ferry range of 3000km.