Nock Travel is simply any movement in the nocking point of a bow as the bow is cycled. And of course, you would expect the nock to move horizontally (back and forth) as you drew back and released it. But could the nock move vertically (up and down) at the same time? It sure can. Of course, you can't see it normally - since the string moves too fast for you to detect it. But for those of us who have pulled our hair out trying to tune a bow that has significant nock travel, this can be a real issue to contend with.
If you drew an imaginary line through the axles of a bow, you would HOPE your nocking point would travel in a path that was exactly perpendicular (90º) to that imaginary vertical line. Hopefully that nock travel would be perfectly level (neither ascending or descending) and perfectly straight (not wavering up and down). If your bow has poor nock travel, the vertical movement of the nock is translated into the arrow's flight when you shoot the bow. So if your nock travel isn't level (let's say it's descending as the bow fires) then the nock is dragging the tail of the arrow downward - giving the arrow a "nock-low" attitude in flight. If your nock travel isn't straight, say it ascends then descends, then the tail of your arrow is jerked up and then down when you fire the bow, causing the arrow to cycle or flex improperly - making tuning more difficult
So the basic premises are, the straighter the nock travels, the straighter the arrow would likely travel and the easier the bow would be to setup and tune. However, achieving perfectly straight and level nock travel is VERY difficult to do. As such, few (if any) bows really can make such a claim. Fortunately, compensating for less than perfect nock travel is not such a terrible task, it's just a hassle we'd rather avoid. So the less travel, the better. If you wish to more learn more about this topic, please click here.
We made no attempt to correct travel issues on our test bows. How they arrived is how they were tested.
NOCK TRAVEL TEST:
travel is best tested from the CENTER of the bow's string. That is
where the best test results are sure be achieved. But in the real
world, this is not where nocking points go. Any nocking point that
is installed in the exact center of the string would be WAY TOO LOW to
actually shoot. Most archers position their arrows so they are
roughly in-line with arrow rest bolt-holes, this usually puts the
nocking point 1-2" above the actual center of the string. So to
best approximate actual shooting conditions, we installed our nocking
points to a position exactly square with the arrow rest mounting holes
on each bow. As such, we expect our nock travel tests to each
As you can see, the Diablo scores a solid knock-down here.
Although the Diablo's nock travel isn't perfectly level (as we expected
neither to be given our setup), it is impressively straight.
In contrast, the Liberty's nock travel isn't straight or level.
This is a decisive win for the Diablo in round #2....10/8.
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