There are four groups of files:

1.	FREE group (12 files)   	- free stream data
2.	P100 group (13 files)		- plate c = 1.00" = 25.40 mm		 	
3.	P050 group (14 files)		- 	c = 0.50" = 12.70 mm
4.	P025 group (15 files)		-       c = 0.25" =  6.35 mm

The file name "Pxxx_yyW.xcc" means:
	xxx  	- plate chord length
	yy	- plate elevation with respect to the pitching
airfoil
			axis

	W	- additional symbol with to following code: (If yy is followed by a
numerical x, i.e., if W is not filled, then the file corresponds to the
unmodified plate):
\item {}		 R	- rounded shape
\item {}		 S	- sharp, one edged shape
\item {}	x	- measuring column position:			

		_3	-:x/C = -0.3000
		 0	-:  0.0000
		 1	-:  0.1500
		 2	-:  0.2250	
		 3	-:  0.3375
		 5	-:  0.5250
		 7	-:  0.7125
		 9	-:  0.9000	

where C = 4" = 101.6 mm is the chord length of the pitching airfoil and
is used as a reference length.

Case 1 - data from two columns in two separate files; cc measuring
column information.

	a	- measuring column a		
 b	- measuring column b

Case 2 - data from both columns in one file:
	ab	- columns a and b

Data arrangement in the file (Mike can say much more about this):

1.	Heading:(first line)   dt  nt  d  tp  (dt - time interval between two
					consecutive masurements,
				   nt - velocity data number in one point,	
				   d  - controlling parameter,
				   tp - pitching period)

Second Line:
		   nx  ny  nt      (nx - number of columns,
				    ny - number of points in one column,	
				    nt - as above)						

The data are arranged into ny (or ny*nx - in ab type files) data sets recorded in
	each individual point: Each set includes:

	x	y	u   (point coordinates and mean velocity)


  	v.x 	v.y	v.x	v.y	v.x	v.y

        		(velocity components - nt pairs in one point )

These data are printed consecutively from left to right along the lines,
in order to save space:

Following the velocity data is a series of weights, one for each
y-location on the measurement column (or column pair).  A weight of 1.0
indicates a valid velocity measurement, and a weight of 0.0 indicates an
invalid measurement.

The figures of the paper were constructed from data from the
following files:

	Fig.  2 - FREE._3

	Fig.  3 - FREE.5

	Fig.  5 - P100_10 series

	Fig.  6 - P100_yy.3	where yy = 25,15,10,05

	Fig.  7 - P100_10.5 and P100_05.5

	Fig.  8 - P025_10 series

	Fig.  9 - P050_10 series

	Fig. 10 - P050_10.3 and P050_10.5

	Fig. 11 - P025-10.5

	Fig. 12 - P050_10R series

	Fig. 13 - P025_10S series		
\bye