Junkers Ju 87B1 Stuka being quickly rearmed January, 1941
Junkers Ju 87B Stuka - The Bertha series of Stuka's
The 'Bertha' series embodied four main design changes: the engine and its cowling, the cockpit canopy, the rear part of the fuselage and the cumbersome undercarriage fairings. The first prototype was an A-1 airframe taken from the production lines: the Ju 87.V6. It was powered by a Jumo 211A giving 1000bhp (746kW) on take off; this was a new engine cowling with an asymmetric air intake in its upper section to house the oil cooler, a large half-moon water radiator with vertical slats under the nose (they were horizontal on the A series), an enlarged air intake for the air compressor transferred to the right side of the cowling (it was on the cowling on the A series). The framer at the rear of the fuselage was thickened and its structure was redesigned. The tail fin surface was again increased.
The braced trousered main wheel undercarriage units were replaced by more aerodynamic two-piece spats, covering part of the wheels and covering the length of the shock absorber stroke. The two-seat cockpit and the canopy were entirely redesigned. The canopy over each position had a sliding portion. The last section was equipped with a ball and socket joint which gave more freedom of movement for the defensive MG 15 machine gun (before it was just a slot). http://www.asisbiz.com/il2/Ju-87B/J...87B1-Stuka-being-quickly-rearmed-1941-01.html
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