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 J.I to the Canada Aviation and Space Museum in 1969. Additionally, one Junkers J.I fuselage exists, at the Museo Storico dell Aeronautica Militare Italiana in Vigna di Valle. This aircraft was previously exhibited at the Leonardo da Vinci Museum at Milano and was restored at the Technical Museum of Berlin between 2005 and 2010. A flyable Junkers J.I replica is under construction in Hungary. Junkers J.I The Junkers J.I (manufacturer's designation J 4) was a German "J-class" armored sesquiplane of World War I, developed for low-level ground attack, observation and Army cooperation. It is especially noteworthy as being the first all-metal