The first production version was the Ju 87 B-1, with a considerably larger engine, its Jumo 211D generating 1,200 PS ( 883 kilowatts ), and completely redesigned fuselage and landing gear, replacing the twin radio masts of the "A" version with a 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.