Efficiciency calculation
Tuning the Bow  Arrow system
The BowArrow system has kept archers busy for many generations.
Also the current generation deals with the issue of technical archery processes.
If one tries to get the whole thing to the bottom, one quickly reaches ones limits.
Many solutions can be found in relevant literature. However, the common archer will be overwhelmed with mathematical and engineering calculations.
Plus it is very complex to calculate the efficiency of bows.
Praxis shows there is a lack of suitable applications. Calculation machineries are not available for most archers, and the complex bow tests consume many financial resources.
The basic idea was to create a tool that would be easy to apply in practice and yet could work very precisely.
Why an online efficiency calculator?
A large number of archers show interest in the technical procedures of archery. However many archers have no way to satisfy their thirst for knowledge.
This efficiency calculator has been designed in a way that it is easy to use by the archer.
To avoid the trouble with all kind of data charts, a very special technical process is used which achieves very good results.
Because the basic values used for the efficiency calculator never change, the obtained data can be used over and over for comparison.
Thus the archer can use its results again and again even after a long time.
Any archer is able to use this tool for very little equipment is needed: a fine scale, a measuring arrow, a bow draw weight scale, and a speed meter. The speed meter (colloquially: Chrony) is commonly available in many clubs or at dealers.
Enter the obtained data in the respective column, and with a click you will have the results.
Bow test series
Edition TB

59/2011

Bowbeaver

Bow name 
Timberpoint Odyssey

Bow type 
Longbow 
Category 
Modern Longbow 
Draw weight in lbs 
45

Brace height in inch

8,25

Draw length in inch 
26.25

Arrow speed feet per sec 
185

Arrow weight in grain 
404

Stored Energy in ftlbs

37.55

37.58

Kinetic Energy in ftlbs

30.71

30.7

Dynamic efficiency degree

81.8

81.7

Here are 14 more comparisons
Technical Notes
The efficiency of the calculator is limited to a maximum of 95%, since in practice, no bow exists which can exceed this value. The entry of unrealistic values is ignored.
Given that this program can be applied to as many bows as possible, there may be found some differences in the induvidual calculations, thus a tolerance in the range of 13% may occur.
The dynamic system between the bow and the arrow was taken into consideration and
includes several variables that may differ by type of bow.
This tool serves the archer
to make the BowArrow system as effective as possible.
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