Flotec buoyancy in Navy REMUS UUV (Feb 2004) Space and Naval Warfare Systems Center, San Diego (SSC San Diego) Remote Environmental Monitoring Unit Support (REMUS) unmanned underwater vehicle (UUV). 2.3.1 Buoyancy Considerations All sensor modules must incorporate some sort of variable buoyancy. The REMUS vehicle is positively ballasted by the manufacturer to approximately 1 lb. (± 0.25 lb.) for operating in most ocean environments. A small amount of space is available in the collar and in the nosecone. Foam or weights can be added to these spaces to compensate for the buoyancy (positive or negative) of the sensor module. Any buoyancy material added to a module must be able to tolerate a depth of 100 m without crushing or absorbing water. One type of foam that has been used successfully is Syntactic Foam made by Flotation Technologies rated to 100 m depth (www.flotec.com). If ballast weights are necessary, they should be added to the bottom of the sensor module. The REMUS design is shown in Figure 9. The weight bar pictured is located on the underside of the vehicle. Weights of various sizes slide onto the bar. The weights are prevented from falling vertically by the bar itself, and are prevented from sliding horizontally by the installation of a setscrew. Since penetrations into the pressure vessel are not desired, the weight bar is held in place by an adhesive product such as 3M 5200 Fast Cure. The sensor modules must also maintain a vertical orientation between center of mass (CM) and center of buoyancy (CB), with CM located below CB. Any large imbalance could give the vehicle a tendency to roll to one side. http://www.spawar.navy.mil/sti/publications/pubs/td/3176/td3176cond.pdf
Market Data 
Markets 
AI
