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MiG-9 FS


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Warenwolf #1 Posted 13 December 2011 - 08:08 PM

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Mikoyan-Gurevich MiG-9

http://www.image-share.com/upload/1127/210.jpg




In February 1945, recognizing that Soviet jet engine development programs were lagging behind those of Germany and Western Allies, the Council of People's Commissars decided that an interim solution, until the soviet research programs caught up with their competition, was to develop jet fighters using the acquired German technology. MiG OKB was ordered to initiate a jet fighter development program based around the BMW 003A engine, while the Yak team were instructed to use Jumo 004 engines for their own program. The new designs were expected to take to air within one year.


The new fighter design was intended to be used in interceptor role, being armed with either 57 mm or 37 mm cannon and pair of 23 mm cannons.  
In addition the new fighter was to achieve a maximum speed of 900 km/h at sea level and a speed of 910 km/h at an altitude of 5,000 meters. Beside having range of 820 km, it was also expected to climb to 5000 meters in 4 minutes.

Due to several failed designs, the MiG OKB was under pressure to succeed with their new project.  

For the airframe of I-300 (the code name of the project) MiG OKB used an all-metal design, with simple straight wings with slotted flaps and delta shaped tail surfaces. The fighter's powerplant was to be two RD-20 engines, which were essentially soviet versions of the BMW 003A (some prototypes used original  BMW 003A engines). Since neither originals or the derivative engines were powerful or reliable it was thought that two engines would provide both enough power and reliability (if one failed the other still worked).
The intake to the engines was in the very front of the aircraft while the engines themselves were located behind the cockpit in the lower fuselage, with the exhaust exiting under the tail section.  The aircraft was also one of the soviet's first designs featuring tricycle landing gear. Despite being expected to operate in high attitudes, the I-300 was not provided with a pressured cockpit.

Armament for the aircraft was planned to be a the pair of 23 mm NS-23 cannons and a powerful 57 mm NL-57 cannon mounted in the engine intake. The large cannon was intended to be used against bombers, while the "smaller" 23 mm cannons were intended for use in dog fights against other fighters.

http://www.image-share.com/upload/1127/212.jpg

The quick pace of the development caused several problems for the project. New engines and the stresses they caused to the airplane's fuselage forced several redesigns of the airplane. The rear fuselage needed heatshield because the exhaust and the heat from the engines would otherwise melt or deform the fuselage.
The very first test flight of the I-300 was on the 24th April 1946, revealing problems with the stability of the aircraft and vibration problems with the new articulated heatshield. The control surfaces were also unreliable.
I-300 was redesigned but not all problems were solved. On 11th July, one of the prototypes crashed killing the test pilot in front of a delegation of high ranking officers.
New State acceptance trials were scheduled on 17th December (MiG OKB continued their own testing, ironing out the problems), but before they or the trial could be completed, a small production run of 10  aircraft, equipped with the original  German BMW 003A engines, was ordered.  The Soviet leadership apparently had believed in the success of the project and the new fighter was given designation MiG-9 FS (some sources believe that political considerations played big part in this �optimism� - the political consideration being that Stalin wanted to show the world that Soviet possessed jet fighters).

During the trials MiG-9 was judged to have met mostly the performance goals and it's flight characteristics were praised by test pilots. However it was also noted that the engines flamed out when firing the cannon at altitude above 3000 m due to gasses from the guns entering the engine intake. It should also be noted that the aircraft had no ejection seats, the fuel tanks were not self-sealing and no armor was provided for the pilot.


Despite these not so small drawbacks, the Soviet leadership believed that MiG-9's these defects could be rectified during production and ordered Factory No. 1 to  go ahead with production.
The final production version, MiG OKB internal code I-301, had the  57 mm NL-57 cannon exchanged for a 37 mm Nudelman N-37 cannon in addition to other small changes in design.

http://www.image-share.com/upload/1140/164m.jpg




The issues plaguing MiG-9 were never fully resolved and it is thought that heavy cannon is suspected to have caused several pilot deaths due to gun gas ingestion. This in turn led to restrictions on heavy cannon usage depending on the attitude (note that it was initially envisioned as interceptor), relegating MiG-9 to operations in low attitude.

Totally 610 (including prototypes)  aircraft were produced  - a rather small production number. Beside the soviet air force, China's people's Liberation Army Air Force used approximately 60 MiG-9s (However, according to "Red Wings Over the Yalu", in time before Chinese intervention in Korean War, Soviets transfered several hundred of MIG-9s to Chinese. Chinese were not satisfied with MIG-9, because of the aircrafts problems and lack of range, feeling that the Russians dumped their hardware to them as they phased out MIG-9 from their air force.)


The MiG-9 could not be considered to have been a successful design, but it provided a necessary experience to MiG OKB in designing the jet fighters. Their second attempt on a jetfighter design, the vastly superior and far more famous MiG-15, was built on experience gained from the design of the MiG-9 fighter.


http://www.image-share.com/upload/1127/219.jpg



General characteristics

	Crew			: 1 (2 on trainer version)
	Gross weight	: 4,998 kg (11,019 lb)
	Fuel capacity   : 1,625 liters (429 US gallons)
	Powerplant	  : 2 � RD-20 axial-flow turbojets, 7.8 kN (1,800 lbf) thrust each

Performance

	Maximum speed   : 911 km/h (566 mph; 492 kn)
	Range		   : 800 km (497 mi; 432 nmi)
	Service ceiling : 13,500 m (44,291 ft)
	Rate of climb   : 22.0 m/s (4,330 ft/min)


Armament

1 � 37 mm Nudelman N-37 cannon	 (40 rounds)
2 � 23 mm Nudelman-Suranov NS-23 cannon  (80 rounds each)

Official BETA RELEASE DATE (according to ESLAF announcement (disinformation manager) ): 30.02.2012

So no need to ask further.

Mitsosk #2 Posted 21 February 2012 - 07:38 AM

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I like this aircraft.Excellent armament(when it likelly to down the enemy and not yourself :P) and,at least in Il-2,decent to good maneuverability.

molon_lave #3 Posted 24 February 2012 - 02:10 PM

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Yes, would love to fly this (have always been partial to the MIG-9 and the YAK-15 thru -23 family. Beautiful aircraft.




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