MB.133

MB.133
File:Vg33.jpg Early model MB.132 in 1939
General information
Type	Fighter aircraft
Manufacturer	Société des Avions Marcel Bloch
Designer	Société des Avions Marcel Bloch
Status	In-Service
History
Introduction date	1940
Retired	1951 (SAF)

The Marcel Bloch MB.133 was a Sieuxerrian designed low-wing monoplane fighter aircraft developed in 1939 after the failure of the MB.130, which the MB.133 was developed off. The aircraft were built after an order for new, modern fighter aircraft had been called by the Sieuxerrian Air Force. While originally supposed to be of wooden construct, the design of the MB.133 was designed to be an all metal structure fighter aircraft in 1940. The aircraft would serve the Sieuxerrian Air Force though the Terinyi War of Liberation, the Sixth Esto-Sieuxerrian War, and various other conflicts. It would be updated a number of times and stay highly capable against even the new model fighter aircraft that would appear in the mid-1940s. It would finally be outclassed by aircraft that were accepted in the late 1940s and with the jet aircraft that also began to become accepted into wide service. It would serve with various Sieuxerrian colonial air forces for years to come and would finally be removed in active service in the 1960s.

Variants

• MB.130

Early prototype model fitted with an 641 kW (850 hp) engine, 4 7.5mm machine guns and a single 20mm nose cannon. Rejected by Sieuxerrian Air Force in 1937

• MB.131

Redesign in late 1937, never left blueprints.

• MB.132

Second redesign in 1938. Prototype built with a 671 kW (900 hp) engine and same armament as MB.130. Used in development of MB.133

• MB.133

First production model accepted into service in 1939. Had same armament as MB.130 but fitted with a new 697 kW (935 hp) engine. Reached top speed of 600 km/h.

• MB.134

Prototype with improved engine and first model MB.133 fitted with the MAT.42, based off the IfK-20 autocannon in place of older 20mm cannon. Carried only 25 rounds. Developed into the MB.135

• MB.135

Production model MB.134. Improved Potez 30M/40 V-12 engine with 746 kW (1,000 hp). Single 37mm autocannon with 40 rounds and 4 7.5mm machine guns. Came into service in 1940.

• MB.136

Lengthened and extended range model of MB.135. Not built.

• MB.137

Designed to meet bomber-killer role. Fitted with 3 37mm autocannons, one in the nose and two in the wing. Not built

• MB.138

MB.136 with redesigned engine. Not built.

• MB.139

Third production model. Built with a single 37mm cannon and 4 20mm cannons. Also fitted with a 969 kW (1,300 hp) supercharged engine. Redesigned aircraft features.

Specifications (MB.139)

General characteristics

• Crew: 1: pilot
• Length: 8.64 m ()
• Wingspan: 10.8 m ()
• Height: 3.31 m ()
• Empty weight: 2,170 kg (4,784 lb) ()
• Loaded weight: 2,730 kg (6,018 lb) ()
• Powerplant: 1 × Potez 32M/42 V-12 Supercharge, 1,300 hp (969 kW)

Performance

• Maximum speed: 701 km/h (424 mph)
• Range: 1,000 km (621 mi)
• Service ceiling: 11,000 m (36,000 ft)
• Rate of climb: 16.5+ m/s (3,250 ft/min)
• Power/mass: 0.35 kW/kg (0.21 hp/lb)

Armament

• Guns:
  

• 1 × 37mm MAT.42 autocannon in nose (firing through the propeller hub) 40 rounds
• 4 × 20mm MAT.23 autocannons with 150 rounds per gun in the wings

• Bombs:
  

• 1 × 300 liter drop tank OR
• 1 × 500 kg bomb OR
• 4 × 50 kg bombs