I just finished plotting these 2009 bow “Draw Force Curves” for all to evaluate.
When reading the results pay careful attention to the Draw Length (on the bottom of the graph) and observe how soon the bow is at or near maximum force, and then again when the curve starts down into the “Valley” to minimum draw force.
Also look at the advertised draw length and the MEASURED draw length. Many manufactures (not all) extend the draw length to help post higher IBO speeds. A very common practice these days. If a different bow “feels” that is draws long, it probably is.
Compare the draw force curves to each other, example, look at a Mathews Drenlin LD and a PSE X Force. You will see the curves are radically different, the Drenlin will be very easy and pleasant to draw…but a lot slower. The X Force is a lot harder to draw, but a lot faster.
Speed is not free, we provide the energy, it just depends on what qualities are more important to you.
Also a comment on what some archers perceive as a “Bump” at the end of a bows draw. I have not tested even one bow with a “bump” at the end of its draw force curve. That perception comes from a draw force curve that starts up very quickly, holds that force and then very rapidly lets off into the valley.
No “bump”, but a large and quick change in holding force. It’s not a bump just a very aggressive bow. High speed has its price and the archer pays for it while drawing the bow.
I hope to compile some 2009 nock travel results soon and will put it out for all to see.
Questions or constructive comments are welcome.