Northrop YF-17 Cobra Flight Test Reports
3 October 1974
31 October 1974
14 November 1974
6 December 1974
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NORTHROP YF-17 COBRA
FLIGHT TEST PROGRESS REPORT - 31 OCTOBER 1974 |
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YF-17’s leading edge
extension (black-painted portion in front of wing) provides a 50%
increase in maximum lift, lower drag due to lift, lower supersonic
trim drag and reduced buffet intensity. |
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Summary of flight test data as of 30 October 1974 |
| Total flights: |
121 (#001 - 117 flts.; #002 - 42 flts.) |
| Total flight time: |
174 hrs. 37 mins. |
| Basic combat maneuvering against F-4Es: |
Completed 25 October |
| USAF-piloted flights: |
81 flts. made by 6 USAF pilots |
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Aerial firing of M-61 gun conducted 11-18 October. Total of 2,088 rounds
of ammunition fired, including bursts at transonic speed with 5-G push-
over and supersonic speed with 5-G pullup. No interruption of engine
operation during gun firing; minimal site piper motion; moderate vibration.
Stores separation test phase began 16 October with dropping of two MK-84
2,000-lb. bombs from A/C #001. Handling qualities with both bombs
(symmetrical) and one bomb (asymmetrical) satisfactory. Landing with
two MK-84s suspended from inboard pylons presents no problems.
Basic Combat Maneuvering against USAF F—4Es flown by Nellis AFB Fighter
Weapons School pilots conducted 21-25 October. Two YF-17 prototypes
flew against each other in BCM mission 26 October. On one BCM flight
landing gear failed to extend. Landing accomplished without incident through
use of back-up emergency gear system. |
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