Type Single seat fighter S/1 Single seat fighter S/2 Single seat fighter V1
Engine 1 Heinkel He S 011A
Dimensions Length 8,25 m , height 3,16 m ,  span  8,74 m, wing area 22 m2  , Length 8,2 m , height 3,05 m ,  span  7,8 m, wing area 22 m2  , Length 9,24 m , height 2,84 m ,  span  8,16 m, wing area 22 m2 
Weights Empty 2290 kg, loaded 4673 kg  , take off weight  kg
Performance Max.. speed 1100 km/h , cruising speed  , range , endurance  , service ceiling  14000 m , climb
Armament 2 MK 108 30mm , 1 MK 112 55mm cannon, mounted in the lower fuselage sides, or one Mk 214 50mm cannon  could be accommodated by the barrel protruding through the front canopy.
In early 1945, Messerschmitt began work on the P.1112, which sought to eliminate design shortcomings from the P.1111 project. The design went through many changes (see drawings below) in a short time until the final form was reached. The project's final design featured a 40 degree swept-back wing with a self-sealing fuel tank (250 kg weight capacity) in each wing. One fuel tank (550 kg weight capacity) was also located in the fuselage ahead of the engine, giving a total fuel capacity of approximately 1900 liters  with a provision for an increase to 2400 liters . A single He S 011A jet engine was planned with provisions made to upgrade to the more powerful He S 011B engine when it became available. Two air intakes were located on each side of the fuselage above the wing roots. The tail unit was changed in the final design to a smaller V-tail from a more conventional large single fin and rudder, this helped to reduce the surface area and thus lessen drag. A tricycle landing gear arrangement was decided upon, with the main gear having a wheel base of 2.1 meters  and retracting from the wing into the fuselage. The pilot sat in a pressurized cockpit that was set well forward, with the canopy being fully faired in to the fuselage. An ejection seat was also supplied and the pilot was well protected by the sloping (23 degrees), 100mm  thick forward windshield, the side windows were 60mm  thick. The armament consisted of four MK 108 30mm cannon which were located on the fuselage sides surrounding the cockpit. Two 30mm MK 103 cannon could be fitted in place of two of the MK 108 cannon. A very unusual mounting of either one MK 112 55mm cannon, mounted in the lower fuselage sides, or one Mk 214 50mm cannon (see drawing below) could be accommodated by the barrel protruding through the front canopy.
            Waldemar Voigt, head of the project bureau, estimated this aircraft could start flight tests sometime before mid-1946. Although mock-up construction of the forward fuselage section (see photos below) was under way, Allied troops overran the Oberrammergau workshops on April 29, 1945 and shortly thereafter took possesion of all files relating to the P.1112.