A new investigative tool for striker. spring characterization has been presented

[Cal]

little or no acceleration of the striker occurs after a travel distance of about .4

Just as with a pellet in a barrel, the highest rate of acceleration takes place initially.... Likewise, however, just as a longer barrel results in a higher velocity, the same happens with the striker.... You can prove that experimentally in any adjustable hammer that does not change the preload as you change the hammer travel (an MRod does both simultaneously).... Useful hammer energy and momentum can be gained through increased travel provided the spring preload has not dropped to zero, after that, you start losing again....

Bob
[/quote]

Yes,  perhaps the continued acceleration of the striker is lost in the noise.  Small gains near the maximum result in large changes of availble energy (MV^2)

[rsterne]

I had another look at the graph, and my "eye" tells me the line is curved right to the end.... My straight edge shows that curve from 0.4" to the end, although slight....

Bob

[Cal]

I had another look at the graph, and my "eye" tells me the line is curved right to the end.... My straight edge shows that curve from 0.4" to the end, although slight....

Bob

You may be right,  I only placed a pencil on the screen as reference for my previous comment.


But just now,....  Using the Libre Draw application to display the graphic,  at 310% expansion,  any "Curvature" between .4 and .72 is a pixel or less.Having used the line function to draw a tangent line,  Which "appears" to be a parallel line.  Certainly the graphed line is not convex!

Where are the first derivatives when you need them?

But,  I have no expectations of exactness in this first demonstration,  it is only a comment about what information the plot may contain.