Mikoyan-Gurevich MiG-5

The Mikoyan-Gurevich MiG-5, AKA MiG-5T or MiG DIS-200, was a twin-engined escort fighter that was designed and developed to escort the Ilyushin DB-3 and the Petlyakov Pe-8 bombers of the Soviet Air Force with the possibility of performing secondary roles such as long-range reconnaissance, light-bombing or even torpedo-bombing. As the Soviet Air Force showed interest in the project and about some possible mass-manufacturing of the type, the official MiG-5 designation was allocated.
Design work started back in early 1940 and it was the first twin-engined aircraft designed by the MiG design bureau and it was going to be powered by two AM-37 engines rated at 1400hp each. It was also equipped with two AV-5I-Il-4 three-bladed propellers. It has also the honour of being the first Soviet aircraft to be equipped with pneumatically operated landing gear.
It was intended to be armed with two Berezin UB 12,7mm (0.5in) plus four ShKAS 7.62mm (0.3in) plus one VYA 23mm (0.9in) cannon in an under-fuselage pod, some very heavy weapon setting for a Soviet aircraft of the time. The VYA cannon was developed by A.A. Voronov and S.Y. Yartsev in 1940 and it was a formidable weapon able to penetrate 25mm (0.1in) thich armour at a distance of 400 meters (1312ft). The cannon pod could be replaced by either a payload of 1000Kg. (2205lb) of bombs or a Type 45-36 torpedo.
The unarmed DIS prototype was built at State Aircraft Factory Number 1 at Moscow-Khodinka and made its maiden flight on 19th May 1941 and state acceptance trials showed a top speed of 560km/h (348mph) which was 104Km/h (65mph) slower than expected. In an attempt to gain more speed, propellers were replaced by two four-bladed AV-9B-L-149 together with some minor aerodynamical improvements. Those modifications managed to increase the speed by 40km/h (25mph). The prototype had a rate of climb 15m/sec (2982ft/min) to 5000 meters (10404ft) with a range of 2280km (1417 miles).

Sources:
1. http://www.airpages.ru/eng/ru/mig5.shtml
2. https://en.wikipedia.org/wiki/Mikoyan-Gurevich_DIS
3. Salamander Books - The Complete Book of Fighters