5M 



Fig. 1. Savonius rotor models used for calibration experiments in July 1962. 



Fig. 2. Eotor unit CS-2 used in experiments 

 of July 1962. 



Fig. 3- Rotor test unit ST-1 mounted in support 

 assembly used for tests of "ST" rotor 

 models . 



and is standard diameter but each of the vanes is 

 double height. Rotor HT-1 (not shown) is another 

 production model identical to CS-2. Both of 

 these rotors were tested in a meter housing 

 (Fig. 2) and the h "ST" rotors were mounted in 

 the special assembly showi in Fig. 3- 



Experiments were run in the Hytech tow tank 

 facility in San Diego, California. The tank is 

 150 feet long by 7 feet wide and has a fresh 

 water depth of 6 feet. The carriage system is 

 hydraulically driven with high tension steel cable 

 and is considered to maintain an acceptably small 

 amount of transverse vibration and variation in 

 speed at tow rates above 0.05 knots. 5 



Normally the rotors were towed in pairs sus- 

 pended from the tow carriage as shown in Fig. k. 



116 



