e. Batteries and Propulsion System 6,500 1b 



f. Ballast Weight 70,750 1b 



Total 117,470 1b 



HYDROCOPTER 



Propulsion System 



The propulsion system would consist of three, Voith-Schneider model 

 24E cycloidal propellers with the following specifications:"'^' * 



1. Overall Diameter 10.3 ft 



2. Length 8.7 ft 



3. Weight ' 35,062 lb 



4. Static Thrust ' 20,000 lb 



5. Approx Unit Price $95,500 



Three 1 ,000 hp horizontal induction motors will drive the cycloidal 

 propellers. Motor specifications are: 



1 . Power 1 ,000 hp at 227 rpm 



2. Weight 5,503 lb (includes motor frame) 



3. Dimensions 106.4 by 80 by 54.5 in. 



4. Line Voltage 2,300 volts 



Hull 



The basic hull structure would be constructed from HY-80 steel. 

 The three ring-stiffened lift tanks would be fabricated from HY-150 steel 

 and have a net weight equal to approximately 53% of their submerged 



Based on table titled "Main Dimensions of the Voith-Schneider Propeller" in 

 "Recommendations for the Installation of Voith-Schneider Propellers," 

 copyrighted by J. M. Voith GMBH, Heidenheim (Brenz), Germany. 



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