Israel Taback
naca-tn-2194
Oct 1950
An NACA oil-damped V-G recorder has been developed in which viscous damping of the accelerometer results in improved frequency response, reduces susceptibility to vibration, and eliminates the necessity for field adjustments of damping.
An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1950/naca-tn-2194.pdf