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