[Impact of the helmet display on head movements against the flying G-loads]. / Vliianie massy élementov nashlemnogo displeia na dvizheniia golovoi v usloviiakh vozdeistviia pilotazhnykh peregruzok +Gz.

Purpose of the study was to evaluate impacts of the mass added by the display mounted onto the helmet on head movements during 30-s flying +Gz from 2 to 6 units growing at the rate of 0.6 u/s. Increase in the total helmet mass and asymmetric placement of the display had a negative effect on g-tolerance and distorted head movements. G-tolerance (attested by the feeling of discomfort) was found to correlate with display asymmetry the extreme magnitude of which can be determined from a pre-set g-load value.

[Effect of inclination angles of supporting surfaces og aircraft seat on pilot's working capacity in long-duration flight]. / Vliianie uglov naklona opornykh poverkhnostei samoletnogo kresla na rabotosposobnost' letchika v dlitel'nykh poletakh.

Results of experimental evaluation of the performance of pilots bound to stay up to 24 hrs in the working pose as a function of inclination of supporting surfaces (backrest and seat) are presented. Small inclination angles (up to 23 degrees) were found to be more provocative of discomfort, painful sensations and work deterioration characterized by higher intensity. It was shown that periodic change of the seatback inclination is an effective way to prevent fatigue in pilots on long-duration flights and to prolong time of comfortable stay in forced posture up to 12-16 hrs. The data on the time of comfortable stay and dynamics of pilot's performance as a function of angles of supporting surfaces of the seat laid the grounds to determination of the best combination to provide comfort to pilot on flight.