A new generation controllable pitch propeller¹

Article type: Research Article

Authors: Beek, G.H.M. | de Mulder, E.P.H.M.

Affiliations: R and D dept., Lips B.V., Drunen, The Netherlands

Note: [1] Paper read before the 5th Lips Propeller Symposium, 19 – 20 May 1983, Lips Propeller Works, Drunen, The Netherlands.

Abstract: New design techniques and components nowaday available were applied on the concept of controllable pitch propellers. Computational power is needed for detailed prediction of hydrodynamic load, for which purpose a discrete vortex model is applied. For controllable pitch propeller design a reliable calculation of blade spindle torques is very important. Powerful computers and programs also enable detailed strength analysis of mechanical parts by means of the finite element method in order to obtain the most rational material use, resulting in the lowest weight and price. Model tests were performed in order to proof the validity of the calculated results. The development in measuring techniques offers the possibility to select an accurate and reliable non-mechanical sensor for pitch measurement. The abolition of the mechanical pitch feed back and the application of standard hydraulic components result in a simpler design of the inboard oil transfer box on the shaft. The fuel consumption of a ships propulsion unit with a controllable pitch propeller can be minimized by a microcomputer programmed in such a way that the most favourable combination of pitch and revolutions is found for a desired speed under all conditions.

DOI: 10.3233/ISP-1983-3035104

Journal: International Shipbuilding Progress, vol. 30, no. 351, pp. 258-266, 1983