A theoretical investigation of longitudinal stability of airplane with free controls including effect of friction in control system

Greenberg, Harry Sternfield, Leonard
naca-report-791
1944

The relation between the elevator hinge-moment parameters and the control-forces for changes in forward speed and in maneuvers is shown for several values of static stability and elevator mass balance.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1944/naca-report-791.pdf