Joined

·
5,655 Posts

Webster posted that interpolating the inch by inch measurements gives a different value to the sum of the inch by inch values taken for a dfc.

My mission of being online has been to show people that its not that hard to measure bows, and in doing so have tried my best to keep it simple.

Now. I cant vouch for what ever method other folks use to work this out.

but here goes.

three measurements taken for simplicity sake.

First inch

6lbs

second inch

9lbs

Third inch

11lbs

Simple Sum of this would give:

11+9+6 = 26 inch pounds of energy.

Interpolate this into half inch values.

first half inch

3lbs (half of six)

First inch

6lbs

First inch and half

7.5lbs (average of 6 and 9)

Second inch

9lbs

Second inch and half

10lbs

third inch

11lbs

total stored energy

3+6+7.5+9+10+11

46.5 half inch pounds. so divided by 2 to give inch pounds

23.25 inch pounds.

as you can see sub dividing means you end up with a different answer to using whole values.

but as a means to keeping it simple using the whole inch is just as valid for comparison to comparison.

trouble arises when you compare the two methods.

and that is where im guilty and for that I apologise. I haven't stopped to think of the differences.

That said. It over eggs the Stored energy

so that delivers a under estimated Efficiency.

and for some reason this didn't occur to me, So here I am owning up to my own focus not letting me see some potholes in arguments.

a DFC is a DFC, but how you arrive at the area under it is where the debate can start I suppose.

as I have openly stated our methodologies have been publically posted so open to criticism all the way along.