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Hadza bow efficiency 70%

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Mesophilic:
I found a published study on Hadza bows and thought some of you would find it interesting.

I'm not a numbers guy...is 70% efficiency accepted,  good, or excellent?

https://www.sciencedirect.com/science/article/pii/S2352409X17303309

DC:
45m/s is about 150fps and 311 newtons is about 70#. Too bad they never mentioned arrow weight.

PS With 70% efficiency, 311 newtons and 45m/s can't a math whiz come up with arrow weight?

GlisGlis:
they live in one of the most inhospitable part of the world
I bet their bows are 100% efficients

Mesophilic:

--- Quote from: DC on February 25, 2020, 10:53:25 am ---45m/s is about 150fps and 311 newtons is about 70#. Too bad they never mentioned arrow weight.

PS With 70% efficiency, 311 newtons and 45m/s can't a math whiz come up with arrow weight?

--- End quote ---

I'll see if I can corner my wife.  Did I ever mention she's a physics PhD? ;D

Mesophilic:
Arrow is 36 grams or approx 560 grains

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