TAKEOFF WITH ONE ENGINE RUNNING (VZLET S JEDNIM MOTOREM V CHODU),
Abstract
The new Soviet TU-124 operates in Czechoslovakia only from airfields with 2000-meter runways, and the maximum speed at which takeoff may be interrupted is set at 230 km/hr for planes weighing 34.5 tons, although the critical speed is 123 km/hr under normal air conditions. If there is a cleared overrun 400 m long and liftoff speed is 235 km/hr, the maximum speed is 253 km/hr. For a plane weighing 36 tons the takeoff run with both engines operating is 1315 meters, but with one engine running it is 1800 m, and takeoff speed must be 240 or 250 km/hr in either case. If one engine stalls, the pilot must instantly decide whether he can stop the plane 50 m short of the end of the runway, or takeoff and return for a landing. At the above takeoff speed, the loss of one engine reduces climb rate by 0.9 m/sec, so that he will need to fly 1180 meters in order to clear an obstacle 10.7 m high and 2.200 m to clear 25 meters. With one engine out the climb rate (with landing gear raised) is 2.7 m/sec for a 34.5-ton plane and 2.3 m/sec for one weighing 36 tons. The minimum speed at which a 34.5-ton plane may continue flight after takeoff is 187 km/hr. With one engine out it is necessary to accelerate immediately by 10 km/hr in order to obtain the full effect of the flaps. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 03, 1967
- Accession Number
- AD0841535
Entities
People
- T. Ligum
Organizations
- National Air and Space Intelligence Center