The secret weapons of the German Luftwaffe of World War 2 is a fascinating study of exotic aircraft design. German engineers undertook a myriad of paper projects to generate a war-winner and, while many of these failed to see the light of day, some marked several "firsts" in the field of aviation. Blohm & Voss was one of the German firms competing for various projects sponsored by the Air Ministry and the P.213 was just one of their many creations to appear in the latter stages of the war - in concert with the "Emergency Fighter Program" pushed by the Luftwaffe from the middle of 1944 onward, the service desperately in search of a fighter/interceptor breed to turn the tide of the air war.
In November of 1944, the Air Ministry released a new requirement related to the program calling for a production-friendly, low-cost point defense fighter-interceptor driven by jet power and requiring a crew of one. The aircraft would be a low-risk, direct complement to the Heinkel He 162 which required more production time than desired. As the He 162 was known as the "Volksjager" ("People's Fighter"), the new aircraft would become the "Miniatur-Jager" and be of smaller dimensions.
To go with the intended lightweight airframe it was decided that power was to come from an Argus As 014 pulse jet engine of 610 lb thrust output. This jet had its roots as the powerplant for the Fieseler Fi 103R "Reichenberg", a manned, expendable suicidal missile-aircraft version of the classic V-1 "Buzz Bomb / Doodlebug" (unlike the disposable-minded Fi 103R, the new interceptor would be reusable). All non-critical mission equipment would be kept from the design to keep operating weights in check and armament centered on a simple installation consisting of a single x 30mm MK 108 series automatic cannon. The ammunition store would number 135 projectiles.
Blohm & Voss joined competitors Heinkel and Junkers in attempting to fulfill the requirement and developed their P.213 against it. The result was a compact design of 6.2 meter overall length with a wingspan measuring 6 meters. The crewman sat forward in the deep fuselage that featured a cut-off nose for aspiration of the of the pulse jet engine. The engine was partially buried in the lower section of the fuselage and its exposed jet pipe extended out under a slim tail stem. The tail stem held a pair of downward-turned planes (inverted butterfly) for control and the wing mainplanes themselves were shoulder-mounted and fitted immediately aft of the cockpit. The mainplanes exhibited straight leading edge lines and forward-swept trailing edge lines. The canopy was of a three-piece design and offered presumably excellent vision out over the nose and to the sides of the aircraft. A tricycle undercarriage (wholly retractable, compressed air-operated) was part of this futuristic-looking fighter design. The MK 108 cannon was buried in the nose near the feet of the pilot - whose position was protected by armor. Overall weight of the aircraft was judged to be around 3,435 pounds (Take-Off).
To counter potentially lethal buffeting of the pulse jet engine within the fuselage (as experienced in the Messerschmitt Me 328 "parasite fighter" program), the engine was held in place by brackets offering the needed flexibility during high-speed flight. A section of flexible tubing was to be used for the intake section leading from the nose to the face of the pulse jet engine. The engine was expected to provide speeds of up to 435 miles per hour with a range out to 775 miles but, because pulse jets required assistance to reach a minimum operating speed, rocket boosters would most likely be added for take-off actions (and jettisoned post-launch).
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