Ye-GGA

In early 1961 the OKB undertook a complete refit of the Ye-6T/1 to reengine this prototype with the R-11F2-300 rated at 6,000 daN (6,120 kg st) and the U-21 booster package, including the Dushkin S3-20M5A liquid propellant rocket engine. This engine and its tanks were housed in a long fairing under the fuselage. The total thrust of the turbojet and

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Ye-ббА (MiG ОКБ three-view drawing)

The YefifiA a record breaker was in fact the Ye-6T/1 prototype reengined with a more powerful turbojet and a liquid propellant rocket engine (Photo RR).

the rocket was 11,465-11,830 daN (11,700-12,070 kg st), the two figures corresponding to the afterburner throttleability range of the turbojet.

This reengining necessitated a few structural modifications. For instance, the lone ventral fin was replaced by two rather high fins whose total area amounted to 11.5 percent of the wing area; the tail fin was enlarged to 4.44 m2 (47.8 square feet), the fin nose was made thin­ner, and an auxiliary fuel tank was installed behind the cockpit. With this aircraft G. К Mosolov beat the absolute world record for altitude on 28 April 1961, ending an incredible zoom at 34,714 m (113,862 feet). In the documents sent to the FAI (Federation Aeronautique Interna­tionale) to verify the record, the aircraft’s power unit was described as one R-37F TRD (turbojet) at 5,880 daN (6,000 kg st) and one U-21 ZhRD (rocket engine) at 2,940 daN (3,000 kg st).

Specifications

Span, 7 154 m (23 ft 5 7 in), length (except probe), 13.46 m (44 ft 1 9 in); fuselage length (except cone), 12.177 m (39 ft 11.4 in); wheel track, 2.692 m (8 ft 10 in); wheel base, 4 806 m (15 ft 9 2 in); wing area, 23 m2 (247.6 sq ft).

Like the Ye-7/1, the Ye-7/2— prototy pe of the MiG-21P pictured here with a finned drop tank—had a dorsal fuel tank with a capacity of 170 1 (45 US gallons)

The Ye 7 emanated directly from the Ye 6T This photograph shows the Ye-7/1 equipped with the new MiG-21P-13 interception system (TsD-30T radar) and two К 13 missiles