Propeller blade tips are the outermost edges of the blades, designed to minimize drag and vortices for efficient thrust generation. Propulsion systems convert energy into mechanical force to move vehicles, often using propellers, jets, or other mechanisms. The design and optimization of blade tips significantly impact the overall performance and fuel efficiency of these systems.

Propeller Blade Tips:
- Size: Varies by application (typically 0.5m to 6m in diameter)
- Grade: High-strength alloys (e.g., ASTM A572, Grade 50)
- Viscosity: N/A (solid component)
- Buoyancy: Neutral (designed for hydrodynamic efficiency)
- Material: Stainless steel, titanium, or composite materials (carbon fiber reinforced polymer)

Propulsion Systems:
- Size: Depends on vessel/aircraft (marine propellers: 1m to 10m; aerospace: 1m to 5m)
- Grade: Aerospace-grade aluminum (e.g., 7075-T6) or marine-grade bronze (e.g., C95500)
- Viscosity: N/A (mechanical system)
- Buoyancy: Neutral or positive (depending on submerged applications)
- Material: Aluminum alloys, bronze, or advanced composites (e.g., carbon fiber)

Propeller Blade Tips and Propulsion Systems may comply with maritime standards such as ISO 484, IMO guidelines, or classification society rules like ABS, DNV, or Lloyd's Register, depending on the specific product and certification.