So I'm interested in learning more about rotor head/hub design so I did some searching and I find that most helicopter books only discuss aerodynamics, this is not really useful for me.
I'm looking more specifically for an engineering book that discuss rotor head design.
Why is there so little published on helicopter engineering?
My main interest is learning more about swashplateless rotor hubs
Most swashplate-less rotor systems, because of the required cyclical nature of control, are implemented via blade trailing edge flaps. The terms you’ll often see, Continuous Trailing Edge Flaps (CTEF) and Warping Actuated Trailing Edge Flaps make clear how the blade flapping is controlled and rotor control accomplished.
While most of those swashplate-less technologies offer advantages in rotorcraft performance, the cost of implementation has yet to reach a sufficiently low level to justify their use on production aircraft. Consequently, most of the information you’re looking for is restricted to research papers and technical reports.
The NASA Scientific and Technical Information Search engine at: https://ntrs.nasa.gov/search.jsp
Try both search types, basic and advanced, using keywords around the subject you’re interested in. It’s also very importation to note the references at the end of each research papers or technical reports. They lead to additional information you can use.
The following papers are related to your area of interest:
Analysis of a Multi-Flap Control System for a Swashplate less Rotor
Continuous Trailing-Edge Flaps for Primary Flight Control of a Helicopter Main Rotor
Performance of Swashplateless Ultralight Helicopter Rotor with Trailing-Edge Flaps for Primary Flight Control
For the advanced undergraduate and graduate students, engineers, and researchers the following level textbooks cover overall helicopter design:
Principles of Helicopter Aerodynamics
Author: J. Gordon Leishman, University of Maryland, College Park
Helicopter Performance, Stability and Control
by Raymond W. Prouty
Author: Wayne Johnson, Aeromechanics Branch of NASA Ames Research Center
Edited by iChris, 02 June 2017 - 03:24.