Efficiency of a propeller is defined as the ratio of available power to the engine power which is. . (3). Note, that this definition for efficiency contains the velocity v, which means, that the efficiency approaches zero as the flight speed goes to zero, because the thrust cannot become infinitely large. So this definition is not useful for the special case of static thrust.
1 Compound Fracture: A compound fracture is a fracture in which the injured bone sticks through the skin. 2  Also known as an open fracture, a compound fracture can be a bit more serious in nature.
Freebase (0.00 / 0 votes) Rate this definition: Distal radius fracture. A distal radius fracture is a common bone fracture of the radius in the forearm. Because of its proximity to the wrist joint, this injury is often called a wrist fracture.Treatment is usually with immobilization, although surgery is sometimes needed for complex fractures.Specific types of distal radius fractures are Colles' fracture; Smith's fracture; Barton's fracture; Chauffeur's fracture.ecause of its proximity to the wrist joint, this injury is often called a wrist fracture. Treatment is usually with immobilization, although surgery is sometimes needed for complex fractures. Specific types of distal radius fractures are Colles' fracture; Smith's fracture; Barton's fracture; Chauffeur's fracture.