Nock Travel Machine by PSE...

[oldbuck]

To all of you who have an interest in the technical performance of bows.
I just found this on “YouTube”, first time I saw it.
It’s a machine used by PSE to determine nock travel.
I designed and built a nock travel machine last year to evaluate many 2007 bows on the market and published my data on the AT forum.
PSE has been doing the same for their bows (probably for a long time) and probably competitors bows as well.
Its just that I have not seen any comparative results before on the forums. I intend to check the 2008 bows soon and put those results on the forums as well. The data has explained to me and others why some bows “tune” differently than others with the same draw weight, draw length and similar advertised IBO speeds.
Being retired I have time and allot of fun doing this during the slow winter period. If anyone has any ideas on what other data may be of interest please get back to me.
Thanks
Oldbuck

[ame]http://www.youtube.com/watch?v=8CYcML7vG4o[/ame]

[superdiablo]

Oldbuck,
I would like to know how much efficiency does the friction on the cable guard/slide robs the bow. If you have a machine simmilar to the PSE one you linked, might be easy just to draw with cable guard and without it, exact same bow (no other variables involved and no cross fire in between brand loyals !), and see hysteresis differences.
Just my question,
Thanks in advance and enjoy the game!
Javier Martinez.

[oldbuck]

Oldbuck,
I would like to know how much efficiency does the friction on the cable guard/slide robs the bow. If you have a machine simmilar to the PSE one you linked, might be easy just to draw with cable guard and without it, exact same bow (no other variables involved and no cross fire in between brand loyals !), and see hysteresis differences.
Just my question,
Thanks in advance and enjoy the game!
Javier Martinez.

Hello Javier,
Good idea, I will try that soon and post results.
I also second the "brand loyal" static problem.
Thanks
oldbuck

[superdiablo]

Enjoy the tinkering and please keep us updated!
Thanks for the time and effort involved,
Javier Martinez.