MIL-DTL-62177E AVDS-1790-2 Engine Series Specification Download
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MIL-DTL-62177E 8 3.5 Support and ownership requirements. Each engine shall possess the following life cycle ownership characteristics. 3.5.1 Endurance. The engine shall retain 90% of the rated power after being subjected to a 400-hour endurance test cycle, operating in an operating profile scenario (see 4.6.4.1). 3.5.2 Identification marking. Parts requiring identification shall be identified in accordance with the requirements of the specific product drawings (see 4.5.2). 3.5.3 Nameplates. Unless otherwise specified in applicable drawings (see 6.2), the nameplate, data and instruction plates shall conform to A-A-50271 (see 4.5.2). 3.5.4 Workmanship/safety. Manufacturing techniques shall not cause the degradation of inherent engine reliability or durability, and shall pose no hazards, physically or electrically to personnel operating the engine (see 4.5.2 and 4.6.4.2) 3.6 Operating environment requirements. Each engine shall operate under the following environmental conditions, without degradation in performance. 3.6.1 Extreme-temperature starting ability. The engine shall start under the following conditions (see 4.6.5.1): a. After being cold-soaked to an ambient temperature of -25°F (-32°C) without external aids or benefit of solar radiation. (Cold-soak is to reduce the temperature of the engine, fuel, and lubricating oil to within 5°F (-2.8°C) of the ambient air temperature). b. After being cold-soaked to an ambient temperature of -65°F, with the winterization kit preheating the cold-soaked batteries and lubricating oil to -25°F. c. After being operated at an ambient temperature of 115°F with exposure to maximum solar radiation with the lubricating oil at the maximum attainable temperature up to 250°F measured at the main oil gallery (oil cooler outlet). 3.6.2 High-temperature operation. Engine temperatures shall not exceed the following limits when operating at the maximum GCBHP full power setting (see table II) with an air inlet temperature of 115°F (see 4.6.5.2): a. Lubricating oil temperature 250°F (measured at the main oil gallery; oil cooler outlet).