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A comparison of hydraulic, pneumatic, and electro-mechanical actuators for general aviation flight controlsMathematical models for electromechanical (EM), pneumatic and hydraulic actuations are discussed. It is shown that EM and hydraulic actuators provide better and faster time responses than pneumatic actuators but EM actuators utilizing the recently developed samarium-cobalt technology have significant advantages in terms of size, weight and power requirements. In terms of ease and flexibility of installation EM actuators apparently have several advantages over hydraulic actuators, and cost is a primary reason for the popularity of EM actuation for secondary control function since no additional systems need to be added to the aircraft. While new rare earth magnets are currently in developmental stage, costs are relatively high; but continued research should bring prices down.
Document ID
Document Type
Conference Paper
Roskam, J.
(Kansas Univ. Lawrence, KS, United States)
Rice, M.
(Kansas Univ. Lawrence, KS, United States)
Eysink, H.
(Kansas, University Lawrence, Kan., United States)
Date Acquired
August 9, 2013
Publication Date
April 1, 1979
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
SAE PAPER 790623
Meeting Information
Meeting: Society of Automotive Engineers, Business Aircraft Meeting and Exposition
Location: Wichita, KS
Start Date: April 3, 1979
End Date: April 6, 1979
Sponsors: Society of Automotive Engineers
Accession Number
Funding Number(s)
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