Junkers Ju 87 single mast mounted further forward on the "greenhouse" canopy, and much simpler, lighter-weight wheel "spats" used from the -B version onwards, discarding the transverse strut bracing of the "A" version's maingear design. This new design was again tested in Spain, and after proving its abilities there, production was ramped up to 60 per month. As a result, by the outbreak of World War II, the Luftwaffe had 336 Ju 87 B-1s on hand. The B-1 was also fitted with "Jericho trumpets", essentially propeller-driven sirens with a diameter of mounted on the wing's leading edge directly forward of the landing gear,
Junkers Ju 290 were constructed for "special purposes" by Junkers. Their works numbers are unknown. What those "special purposes" were, or if they ever came to be, is unknown. A number of Ju 290s survived the war, the Allies evaluating at least three examples, none of which was known to have survived intact into the 21st century. Junkers Ju 290 The Junkers Ju 290 was a German large, four-engine long-range transport and maritime patrol aircraft used by the Luftwaffe late in World War II that had been developed from an earlier airliner. The Junkers 290 was developed directly from the Ju 90 airliner,