Nemesis/Onza3 Design?

[bb11]

What is the purpose behind the design of the riser on the Nemesis and Onza 3? What are the purported benefits? Any detriments?

[archerx7]

The bridge makes for a slightly stiffer riser and also helps direct some of the vibration away from the grip.

[HawgEnvy]

same principal as Hoyt's tec riser and the risers on APA bows but theirs is also a carry handle

[bb11]

same principal as Hoyt's tec riser and the risers on APA bows but theirs is also a carry handle

i new they were similar tot he Hoyts, didnt know why Hoyt created a riser in that design.

[bfisher]

i new they were similar tot he Hoyts, didnt know why Hoyt created a riser in that design.

Acctually Hoyt didn't create the bridged riser design. Let's just say that the popularized it. I think Martin gets the credit for designing the bridge riser back in the late 80's, but I was just looking on www.archeryhistory.com and it seems that Emery Loiselle had built an experimental one way back in 1975.

[SonnyThomas]

Acctually Hoyt didn't create the bridged riser design. Let's just say that the popularized it. I think Martin gets the credit for designing the bridge riser back in the late 80's, but I was just looking on www.archeryhistory.com and it seems that Emery Loiselle had built an experimental one way back in 1975.

Yep, Martin. archeryhistory.com is the best place to find today's "you gotta have" before they became today's "you gotta have."

[bb11]

and what is the purported benefit of it, just removing some vibration?

[Montalaar]

The bridge makes for a slightly stiffer riser and also helps direct some of the vibration away from the grip.

It has already been mentioned.

[bb11]

It has already been mentioned.

ok thanks. I was just wondering if that was all there was to it.

[bfisher]

Yep, just stiffens the riser. Bow designerhave to go through a lot of math to get these things right. People aren't aware of it but the torsional pressure on a riser is tremendous. The last time I saw an actual mathemtical figure was about 20 years ago. At that time somebody came up with a figure of about 70,000 pounds per square inch of torsional (bending) pressure on a riser. I'd venture a guess that with today's modern technology (limbs and aggressive cams) it would have to be closer to 100,000 psi.

There are videos on You Tube showing in super slo mothion some of the things that happen when a bow is shot. It can be scary. So is a bridge riser neccessary? Basing on the amount of riser failures I say NO, but I'm not an engineer either.