Project Mohole Drilling Platform 



Appendix A 



PLATFORM MODEL 



The platform model in the final configuration for towing and self-propulsion 

 tests is shown in Fig. Al. The positioning units were not installed since the 

 performance tests of these units determined the net thrust, that is the propeller- 

 nozzle thrust less drag due to struts, housing, etc. Different model scales were 

 used for different portions of the testing program. The largest model used was 

 built to a scale of 1:27-1/2 and was used for towing and self-propulsion tests at 

 the University of Michigan. Self-propulsion, maneuvering, towing and rotating 

 arm tests were conducted at the David-Taylor Model Basin with a 1:45 scale 

 model. Wind tunnel tests were conducted with above water and below water 

 portions of the platform built to a scale of 1:60. 



Tests were performed at various times during the period of development of 

 the platform. Consequently, model configuration differed from the earlier to 



SECTION B-B 



SECTION C-C 



STARBOARD PROFILE 



Fig. Al - Mohole drilling platform 

 propulsion test model 



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