Effects of passenger airplane transport on blood

Objective: We examined the effects of passenger air transport by regular airplanes for air transportation on blood for transfusion. Materials and methods: Irradiated red blood cell (RBC) solutions were transported by regular passenger airplanes which and were static in the cabin during the flight. Blood samples were evaluated visually and biochemically before and after transport. Hemolysis of the transported samples was compared to that of the non-transported ones. The vibration in the airplanes was also measured using a vibration data logger. Results: There was no significant hemolysis of RBCs during airplane transport. The vibration in the airplane was lower than that in automobiles. The temperature in the active transport refrigerator (ATR) room was maintained at 2−6°C. There was no significant hemolysis of RBCs during the two transport routes. Conclusion: Temperature-controlled air transport of blood transport in the ATR 700 airplane maintained a the blood at a good quality that rendered blood it fit for blood transfusion.

Entropy-Statistical Analysis of the Air Conditioning System of a Passenger Airplane

This article discusses a static mathematical model of the air conditioning system of a passenger aircraft with moisture control. The model was developed to calculate various operation modes of this system, for one of which the entropy-statistical analysis was performed. In the analysis, the main nodes of the circuit are considered, an assessment of their influence on the overall efficiency of the air conditioning system is carried out, as well as the advantages of the given entropy-statistical analysis method for such systems are evaluated. The mathematical model was developed in the Matlab Simulink software package.

Design and Optimisation of Fuel Tanks for BWB Configurations

This paper describes assumptions, goals, methods, results and conclusions related to fuel tank arrangement of a flying wing passenger airplane configuration. A short overview of various fuel tank systems in use today of different types of aircraft is treated as a starting point for designing a fuel tank system to be used on very large passenger airplanes. These systems may be used to move fuel around the aircraft to keep the centre of gravity within acceptable limits, to maintain pitch and lateral balance and stability. With increasing aircraft speed, the centre of lift moves aft, and for trimming the elevator or trimmer must be used thereby increasing aircraft drag. To avoid this, the centre of gravity can be shifted by pumping fuel from forward to aft tanks. The lesson learnt from this is applied to minimise trim drag by moving the fuel along the airplane. Such a task can be done within coming days if we know the minimum drag versus CG position and weight value. The main part of the paper is devoted to wing bending moment distribution. A number of arrangements of fuel in airplane tanks are investigated and a scenario of refuelling - minimising the root bending moments - is presented. These results were obtained under the assumption that aircraft is in long range flight (14 hours), CL is constant and equal to 0.279, Specific Fuel Consumption is also constant and that overall fuel consumption is equal to 20 tons per 1 hour. It was found that the average stress level in wing structure is lower if refuelling starts from fuel tanks located closer to longitudinal plane of symmetry. It can influence the rate of fatigue.