drops toward the lower wall of the test section u sub u221e is the velocity of the main stream flow which for most experiments was 20 ft sec these parameters have been varied in experiments performed to demonstrate the concepts described previously from the results that have been obtained it may be concluded that the basic principles of operation of the system to produce parallel fiber orientation have been demonstrated as shown in fig3 the values of the above noted parameters were as follows 1 x c h 0 5 x c 0 at the counterflow jets thus the fibers were released one half test section height upstream of the jets the above values of these parameters are typical for the experiments performed but successful operation is not restricted to these values the fiber alignment occurs in a very short distance less than one foot while maintaining a low air stream velocity 25 ft sec or less the use of counterflow jets 2 to achieve the desired velocity gradients provides great flexibility for the system because changes in flow conditions can be made rapidly and easily this is important when dealing with changes in fiber geometry and properties and also allows.