Реферат: Replacement Of Main Aircraft Batteries In The

Study 3 lists data to support the elimination of hazardous materials and safety concerns associated with them. The Tesla battery being a Dry-Cell battery does not have nor create any hazardous materials. The NICAD battery has hazardous materials and is cited in appendix B on the Material Safety Data Sheet (MSDS). The MSDS lists all hazardous substances associated with the NICAD battery, related health hazards, special protection information, etc. Another safety concern associated with the hazardous material in a NICAD battery is Thermal Runaway. Thermal Runaway is a condition in which the current for a fully charged nickel-cadmium battery rises out of all proportion to the impressed voltage (NAVAIR 17-15BAD-1, 1991). In laymans terms a Thermal Runaway condition may occur due to low electrolyte level, electrolyte contaminants, etc in the NICAD battery which causes excessive heat build up. The excessive heat build up then causes the battery voltage to begin to drop and battery current then rises. If temperature continues to rise then you continue in a vicious cycle of voltage drop, current increase, temperature increase and it can lead to the battery exploding and being an explosion and fire hazard. In flight this may lead to a very dangerous emergency situation. The Tesla battery being a Dry-Cell type it is not capable of a thermal runaway condition, therefore this safety hazard would also be eliminated with the Tesla battery.

Battery Replacement

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In summary the replacement of the HU-25 main aircraft NICAD batteries with the Tesla TI4676 Micro Power Unit Dry-Cell battery is a step towards upgrading to the advanced technology available today. It would present a high initial procurement cost that would be offset by the reduction of maintenance man/hour costs related to battery maintenance. It also will free up personnel for other maintenance tasks. Additionally, The Tesla battery elimanates all hazardous material concerns and eliminates the possibility of a thermal runaway safety mishap. The next step to take would be to submit an Aircraft Configuration Control Board Item to request the purchase of four Tesla TI 4676 Micro Power Unit Dry-Cell batteries and install them into an HU-25 aircraft for a six month prototype evaluation.