Impact of rain environment on equipment
(1) Atmospheric environment
- Limit the effectiveness of radar.
- Restricted aircraft operation due to reduced visibility and reduced wing lift (only during heavy rain).
- Damage the aircraft in flight.
- Affect firing and missile launch.
- Reduce the optical monitoring effect, even can not carry out optical monitoring.
- Reduce outdoor work efficiency.
- Cause misoperation of fuze.
- Reduce the visibility of optical devices.
(2) Rain attack
Rain impact erodes equipment surfaces.
(3) Accumulated rain/infiltration
- Resulting in strength reduction/swelling of some materials.
- Increased possibility of rust, corrosion, and even mold growth.
- Increase the weight of equipment.
- Make electrical and electronic equipment inoperable or unsafe.
- Electrical equipment fails.
- Ice inside the equipment may cause slow degradation and functional failure due to expansion or rupture of components.
- Change the heat exchange.
- Propellant combustion is slowed down.
Common rain test standard
One of the most widely used rain test standards is the IP (Ingress Protection) rating system. This system provides a two-digit code that indicates the level of protection provided by a product against dust and water. The first digit represents the level of protection against solid particles, while the second digit represents the level of protection against liquids.
Another important rain test standard is the ASTM (American Society for Testing and Materials) D4585 test method. This method involves exposing a product to a controlled amount of water from a rainfall simulator, while measuring the amount of water that penetrates through the product.
The ISO (International Organization for Standardization) 20653 standard is also commonly used to test the resistance of products to water ingress. This standard involves subjecting the product to a specified amount of rainfall, while measuring the amount of water that enters the product.
