Analysis Used in Submerged Body Research 407 
SERVO DIGITAL ER OSRAMMEK 
AMPLIFIER INDICATOR RGAE 
IBM 
ELECTRIC 
TYPEWRITER 
SELECTOR 
SWITCH 
STATIC 
BALANCE & 
SENSITIVITY 
CONTROL 
DYNAMIC 
SYNCHRO E FORCE INEST ae BROWN 
SWITCH OMPONENT (LONG- RECORDER 
SEPARATOR CONSTANT FILTER) 
Fig. 21. Instrumentation system for Planar-Motion-Mechanism System 
400 
SUPPLY 
GAGE} -CONTROU_ISTATIC on 
A400 CYCLE] }  --- doyrrare-o| SCANHER 
SUPPLY ee bg ro 
Ee er 
ae Ear lke 
R 
AMPUFIER” —TFUNCTION RELAYS IBIER 
CEROMICALY HVTAERD 40 
MECHANISM DRIVE SHAFT | 3 77777 TH ee TEGRATE| 
SWE- COSINE 
POTENTIOMETER 
ELECTRICALLY ACTUATED 
BY MECHANISM 
ORIVE SHAFT 
Fig. 22. New instrumentation system for static and dynamic stability tests 
The roll gage assembly, shown in Figs. 17a and 17b, was modified as sketched in Fig. 
17c. The longer shaft is now supported in the gimbal block by two ball bearings. For the 
static, heaving, and pitching tests, the shaft is attached to the gimbal block by a large 
taper pin. In this mode the balances and gimbal block assembly function as described in 
Ref. 2. 
For the rolling tests, the taper pin is removed and the push-rod attachment is installed. 
The body can now be oscillated in roll through the roll gage located at the aft strut and the 
three-degree-of-freedom gimbal located at the forward strut. 
The range of oscillation frequencies and frequency changing procedures for the rolling 
mode are the same as for the pitching and heaving modes [2]. 
