MIL-DTL-9398D
3.3.3.4 Iron and steel parts. Where practicable, iron and steel parts shall be chromium,
nickel, cadmium, or zinc plated in accordance with SAE AMS-QQ-C-320, SAE AMS-QQ-N-290,
SAE AMS-QQ-P-416, or ASTM B 633 respectively. Parts in a confined space in the presence of
organic material shall be tin-cadmium plated in accordance with MIL-P-23408. The class and
type of plating shall meet the requirements of 3.3.4.
3.3.4 Protective treatment. When materials are used in the construction of the generator
that are subject to atmospheric or environmental conditions likely to cause corrosion in normal
service life, they shall be protected against corrosion in a manner that will in no way prevent
compliance with the performance requirements of this specification. Finishes and protective
coatings that will crack, chip, or scale during normal service life or are affected by extreme
atmospheric or environmental conditions shall not be used.
3.3.5 Fungus-proof materials. Materials that are nutrients for fungi shall not be used
where it is practicable to avoid them. Where used, they shall be treated with a fungicidal agent
acceptable to the procuring activity. If used in a hermetically sealed enclosure, fungicidal
treatment will not be necessary.
3.3.6 Fumes and vapors. Materials used in the construction of the generator shall not
produce corrosive, deleterious, or toxic fumes or vapors under the conditions specified herein.
3.4 Design and construction. The generator shall be designed to operate at any speed up to
5,500 revolutions per minute (RPM) in either direction of rotation and in any mounting position.
The generator shall conform to MS25038 and shall be suitable for mounting on a pad conforming
to figure 1. The generator design shall be such that the output voltage shall be 3-phase, having a
frequency of one cycle per revolution of the generator drive shaft. For calibration purposes of this
specification, 4200 RPM will be 100 percent RPM. The generator shall be designed to withstand a
steady 20g load applied along any of the three principal mutually perpendicular axes when
mounted on a pad conforming to figure 1. The generator shall be constructed so that no parts will
work loose in service and so that it will withstand the normal shocks, vibrations, and other
conditions incident to shipping, storage, installation, and service without failure. The generator
shall have 1,000 hours minimum operating life on an aircraft engine.
5
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business