| Home | Mathematics and Fly Fishing About the programs UniRod and NewUni

The programs were origninally not intended for distribution and some knowledge of the use of Excel and programming in VBA is required to get full benefit of the programs.
You should save an original copy of the programs before attempting to make modifications.
Something could go wrong - and believe me, it will.

UniRod and UniRod_Barrer

The program calculates the actual moments and stresses in a split cane fly rod, using the loads distribution assumed by Garrison.
The data is computed for 5" segments. The number of segments is determined by the length of the rod exc. 250 mm for handle.
The program locates the ferrule at the mid point.

The program will calculate rods for AFTM # 4, 5, 6 and 7.

The relative deflection is the tip deflection divided by the calculated length of the rod.

The deflection index is the relative deflection divided by 0.325.

The stress factor is the percentage of reduction in stress at the point 5" from the tip.

The program makes it possible to change the Garrison stress curve and calculate a new rod based on a Garrison stress curve. If you want to calculate a rod from a Garrison stress curve you must start by calculating a rod having the same input as the rod whose Garrison curve you want to change.

The program already contains data for known rods, so entering your own data should not present any problems.

Input:      Name of rod in mm 
	    Length of rod in mm
            AFTM #
            Diameter of top eye in gram
            Weight of ferrule in gram
	    Rod diameters in mm or inches
            
Output:     Deflection curve in mm
            Reference stresses in lb./sq. in
            Radii of curvature in mm
            Garrison's stress curve in lb./sq. in
            Data for calculations in NewUni

The deflection index and the stress factor calculated are approximate values and may have to be modified before they are used in NewUni. Compare the stress curves calculated by UniRod and NewUni and make changes to the deflection index and the stress factor to obtain the desired stress profile.


NewUni


Calculates a new rod.

Input:	     Name of rod 
	     Length of rod in mm
             AFTM #
             Diameter of top eye in mm or inches
             Deflection index
	     Stress factor
	     Stress profile # (3, the only available profile)
             Weight of ferrule in gram

Output:      Diameters
             Deflection curve
             Reference stresses
             Radii of curvature
             Data for calculations in NewUni

Here is an estimate of how a rod with a Garrison stress profile should be designed.

Rel. defl. = 0.92 fast rod        Stress factor from -5 to 5%
Rel. defl. = 1.00 medium rod      Stress factor from 0 to 10%
Rel. defl. = 1.08 slow rod        Stress factor from 5 to 15%

Feet/inches to Millimeters Converter

The default value is shown as 6 Feet 0 inches = 1828.8 Millimeters.
Change either one of those defaults, then click anywhere OUTSIDE the text box.
Inches must be written as decimals