Linearized Potential Flou T heory for ACVs in a Seaway 



h height of C. G. above undisturbed water surface at zero 



speed ahead. 



h height of the thrust line above C. G 



I moment of inertia of ACV about lateral axis through C. G 



< = I yV + mh G ) 



I moment of inertia of waterplane area of both side hulls 



about lateral axis through the origin o 1 . 



I , , moment of inertia of ACV about lateral axis through o' . 



i,j,k unit vectors along axis in (x, y, z) - system . 



AAA 



1 ij' ,k' unit vectors along axes in (x',y',z') - system. 



k, 1, m, n as superscripts refer to the powers of perturbation 

 parameters in perturbation expansions. 



as subscripts refer to the component terms of the pertur- 

 bation expansions. 



k wave number of incident wave ( = & /g ). 



k related to speed of translation ( = g/V ). 



L, M, N, components of moment vector. 



L load waterline on the longitudinal planes of the side hulls. 



L vertical projection of hemline of the flexible extension at 



the front of the cushion on the plane z = . 



L lower boundary of air cushion on the undisturbed water 



surface'. 



L boundary of ACV on undisturbed water surface . 



L>„ vertical projection of the hemline of the flexible extension 



at the rear of the cushion on the plane z = . 



L , L , L , L as defined in Appendix V. 



M moment vector. 



► 



1 p 



M pressure moment vector. 



M pressure moment vector (cushion hull). 



_^ C 



M pressure moment vector (side hulls). 



_^ H 



M rigid body moment vector. 



m total mass of ACV. 



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