exterior structure design alternatives
DESCRIPTION
Exterior Structure Design Alternatives. Cornell CUAV: Twin hull on aluminum frame design. MIT Orca 4: Dual side thrusters. Colorado HydroBuff R5L: Front dive planes and aft rudder. Florida Atlantic Squid: Vector thrust control. Hydrodynamics Mechanical Design. Myring Hull Contour - PowerPoint PPT PresentationTRANSCRIPT
Exterior Structure Design Alternatives
Cornell CUAV: Twin hull on aluminum frame design MIT Orca 4: Dual side thrusters
Colorado HydroBuff R5L: Front dive planes and aft rudder Florida Atlantic Squid: Vector thrust control
Hydrodynamics Mechanical Design
• Myring Hull Contour – Design developed by U.S. Navy to
minimize drag for submersible objects.– Divides into 3 compartments: Nosecone,
mid-section and tailpiece• Dimensions
– Nose Cone Length: 6 inches– Mid Section Length: 24 inches– Tailpiece Length: 12 inches– Mid Section Thickness: 1/8 in.– Maximum Outer Diameter: 6 inches
• Material Selection– Nose Cone: PVC– Mid Section: Aluminum 6061– Tailpiece: Aluminum 6061
• Control Surface Configuration– 4 NACA 0012 airfoils mounted to the front
of the tailpiece
Total Drag computed to be 16.1 N at 5 Total Drag computed to be 16.1 N at 5 knots (with antenna deployed at 6 in.)knots (with antenna deployed at 6 in.)
Control Surface Sealing Design
• Must withstand pressure of 45.0 psi• Dynamic Seals
– American Variseal W10-MS-R-010-W-Z80 Rod Seal
– Low Friction Servo Movement– Spring Loaded Rotary Shaft Seals
• Dimensions– 0.375 in.Housing Groove Diameter – 0.99 in. Gland length
• Seal pressed in housing groove in tailsection
• Servo used for electronic control of control surfaces
• 1/4 in. diameter stainless steel shaft passes from servo to control surface
– Aluminum coupler and set screws used to attach servo to shaft
– Pins used to attach shaft to control surface
Control Surface Sealing Design
Rotary seal schematic as provided by American Veriseal