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Bows by mass

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Badger:
Jamie, for a 26" draw it calls for 12.5 oz, so i would try to keep it around 14 or under. If you do the formula it will almost force the bow to be an elb, I doubt if it would work for a bendy handle flatbow unless the wood you are using is very light. It's trying to tell you something LOL.  Steve

DCM:
As a point of reference, I compared my two osage ABC bows to Badger's boo backed ipe and they were both within .5 of an oz of each other and his.  These bows were crafted a year apart with no consideration of mass weight whatsoever.  I think it's a pretty remarkable phenomenon and to me validates the wood-is-wood dogma.

Badger:
Jamie sometimes a slight manipulation of your design idea is all that is needed to bring a bow right in. A full arc 1 1/2" wide red oak bow might weigh somewhere around 16 or 17 oz. The formula says that is too much ands it will show in the bows performance. Just keeping the mid section a bit stiffer and using a more elyptical tiller will still allow you to use the 1 1/2 wide and bring your target mass up to around 16 oz, here you will notice good performance. Steve

Dave, it is funny that you mentioned that, basically after reading your tillering tecniques and starting to practice them I was able to start using the mass projections with some accuracy. Your tecnique lends itself particulary well to this.

marvin:
David,

Any chance you could post a summary of your tillering technique Steve is referring to. It would be great to have that info included in this thread and would make the thread a great reference for future use.

Badger:
    Marvin, if I remeber right Dave was just giving advice to a new comer in a non descript thread, one of the ose cases where you read the same thing a hundred times and it suddenly becomes clear. I had been rushing my tillering quite a bit up to that point. Dave advised the now comer to never pull a bow any further than what it would take to expose an area that needed work, and he advised never to pull a bow past intended draw weight durring tillering while constantly monitoring the set a bow is taking. They say when the student is ready the teacher will appear. I know speaking for myself I have always had personnal objectives attached to my bow making. These change periodicaly and this is what keeps my interest. For a long time simply making the fastest bow I could make was my objective. I have changed that now to the fastest bow I can make repeatedly that will hold up and maintain it's performance over time. There seems to be about 15 fps difference at this time so narowing that gap is todays challenge. Exploring different designs and different ways to implement existing designs along with the trade offs involved could keep one busy for a lifetime I believe. I always have to go back and look at the straight limbed long bow as the anchor post of it all and when done right is hard to get much improvement on. Steve

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