The mathematical expressions for the force coefficients determined for 

 configuration A-1 are used in the Appendix to predict the kiting performance of 

 towlines of greater length for selected speeds and depressor forces. Configu- 

 ration A-1 was selected for the predictions since, this configuration demonstrated 

 a relatively low side-force coefficient and did not introduce the structural 

 uncertainties associated with the towlines incorporating chordwise cuts. Although 

 the calculated kiting performance may have limited quantitative value due to the 

 imposition of assumptions required when extending these mathematical expressions 

 to longer towline lengths, the predictions do provide a qualitative representation 

 of the influence of cable scope, tow speed and depressor force on towline kite 

 angle at the towing platform for a given towline configuration. In general, these 

 calculations indicate that increasing the towline scope for a constant tow speed 

 and depressor configuration or increasing tow speed for a constant towline scope 

 and depressor configuration increases the kite angle at the towing platform. 

 However, for each tow speed there appears to be a maximum value of kite angle at 

 the towing platform that all scope lengths approach. This maximum value occurs at 

 a discrete value of depressor force (typically low depressor force) for each 

 scope. Variations of the depressor force above or below the force that produces 

 this maximum kite angle will decrease the kite angle at the towing platform. 



The calculations in the Appendix also indicate that, for a selected maximum 

 allowable kite angle at the towing platform of 30 degrees, towline lengths of 

 configuration A-1 approaching 457 m (1500 ft) could be towed at speeds up to 15.46 

 m/s (30 knots) provided the correct depressor force is selected. However, using 

 these calculations as towline performance predictions for specific lengths of 

 towline must be viewed with some degree of caution due to the assumptions 

 associated with the mathematical expression for Cg. 



37 



