Find a Security Clearance Job!

Military


Su-24 Escape System

The Su-24 became the first aircraft of the Air Force, which used an ejection system to provide rescue crew in almost all flight regimes, including the stages of finding on the ground. The lives of test and operational pilots were saved on numerous occasions by the K-36D ejector seat, although even these created some headaches in their installation. In one incident in November 1975, a crewman sitting in the right-hand seat prior to a test flight unwittingly snagged its activation pin, and moments later the unsuspecting navigator was catapulted from the cockpit. According to records of the incident, his chute opened normally and he floated down safely in the first ever ejection from a stationary Soviet aircraft.

It should be noted that installed on the Su-24 is the escape system with armchairs K-36D, developed under the leadership of General Designer G.I.Severina. It showed very high reliability and more than once saved the life of testers in the most critical situations. According to regulatory documents escape system of the aircraft with seating K-36D guarantees safe ejection at all altitudes and speeds over 70 km / h.

The high reliability of the system confirmed the curious incident that occurred November 11, 1975 in the 63rd bap, develop new aircraft operation. This is what happened: the crew of the Su-24 was in the cockpit and was preparing for the flight. It was given the command to start the engines. As promotion rotor pressure in the hydraulic system of the aircraft has been increasing, and the center stick, which were previously in the back fence, and went forward to the neutral position.

This right RUS hooked delay system bailout and pulled the pin, which led to the triggering of the firing mechanism of the right of the chair. Unsuspecting mate V.M.Osmanov was in the air. According to program staff opened a parachute and landed safely near the Ottomans from the aircraft. The system worked flawlessly saving at zero speed and altitude (mode "0 - 0"), which has not happened in the practice of domestic aviation.

The cause of the incident had happened a number of design features of the control system of the Su-24. Because the center of gravity is in front of the horizontal tail axis of rotation, in the absence of pressure in the hydraulic stabilizer console deflected under its own weight downwards (to pitch), which moves the control stick back.

To increase survivability in the management of the Su-24 is duplicated. This allows co-driver in the event of loss of pilot performance (for example, wound) produce a limited aircraft maneuvering. And as the control knob at the navigator is shorter than that of the pilot (handle normal length is set only at the removed tube indicator radar "Orion" and EOV "Seagull" for training flights), it was possible her engagement for the delay ejection seat, which is what happened in the case described above.

After inadvertent ejection Osmanov was recommended to use a special clip (nylon rope with two foam cylinders of red color on the ends) holding horizontal tail in the neutral position when relieving pressure in the hydraulic system. For such kind of test aircraft crew he was awarded by the designer Sukhoi gold nominal hours and chief designer of the ejection seat G.I.Severinym - that protective helmets ZS-5.




NEWSLETTER
Join the GlobalSecurity.org mailing list