propeller efficiency

propeller efficiency

[prə′pel·ər i‚fish·ən·sē]
(mechanical engineering)
The ratio of the thrust horsepower delivered by the propeller to the shaft horsepower as delivered by the engine to the propeller.

propeller efficiency

The ratio of the thrust horsepower to the brake horsepower, or the ratio of the thrust power delivered to the engine to the engine power required to turn the propeller. On an average, 20% of the brake horsepower is lost because of frictional losses; thus the thrust horsepower is generally 80% of the brake horsepower.
References in periodicals archive ?
Earlier, in response to the global shipping industry's continuing focus on fuel efficiency, the company launched its new Systems for Hull and Propeller Efficiency (SHAPE).
Varghese (2010) described a number of characteristics that increase propeller efficiency and presented an analysis of multiple designs.
LF] and propeller efficiency result in the required power [P.
The vessel was equipped with a Propeller Boss Cap Fin (PBCF) to develop propeller efficiency during her tie- up.
Emphasis will be placed on defining the interdisciplinary interactions and corresponding effects on overall propeller efficiency.
In addition, it is known that PPs with shrouded propellers have increased propeller efficiency and decrease fuel consumption during the cruising flight mode (Udartsev et al.
The combination of reduced lift generated by the wing, reduced engine output and reduced propeller efficiency all combine to limit runway, climb and cruise performance in ways detailed by the charts and tables in your POH.
Tacking to account a electronic driver module efficiency of 0,95 %, a electric motor efficiency of 0,9 % and also a propeller efficiency of 0,75 % we find a 0,64 % global efficiency of a entire propulsion system of the boat.
The new, state-of-the-art hull design reduces water resistance and increases propeller efficiency providing not only an exhilarating performance at all speeds but also greater fuel economy.
The product increases propeller efficiency by around one quarter, significantly improving fuel usage figures and boat handling characteristics.
As long as there are such limits on propeller efficiency, the Fl can be expected to remain near the top of its class and possibly in production for 20 years," said a company statement.