Main Discussion Area > English Warbow
Gardner's mass theory and 100# + bows
leehongyi:
--- Quote from: JNystrom on June 29, 2018, 05:19:02 am ---I have been thinking this for sometime and i think this is better place to open a conversation than the FB platform.
In TBB4, there is a superb section about Steve Gardner's mass principle, which shows you how to track a proper mass for your bow is it a longbow, shortbow, perryreflex, ipe or juniper. With this mass table, there is some extra rules to get finer estimates including this one:
"On the ELB designs calculate them out as normal and then multiply the answer by the following factors: 100# X 0.90, 90# X 0.92, 80# X 0.94, 70# X 0.96, 60# X 0.98."
First of all, where does this -10% mass on 100lb elb come from? Will the factor be even lower when you go over 100#?
There is one australian guy in fb group that i conversated with about his 75" osage warbow, which is quite heavy in mass for its poundage which made me think the mass principle further. He is aiming for a 150# @30" and the mass for this kind of bow should be around 37oz (1050g), while many of these to-be osage warbows of different bowyers are whopping ~50oz (1400g).
--- End quote ---
what is the unit？gram or oz? And the draw length?
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