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Hi tech redneck flight bow.
willie:
Arvin,
if you are going to build another and want computer program input, I would be willing to do a follow along that demonstrates how to use visualbow.
we could collaborate your design finetuned with the program, and post the work as we go, all in the same thread.
Selfbowman:
Willie I Am not sure I’m capable of doing what you are talking about because of my lack of computer skills. I’ve built from architectural plans my whole adult live and can follow plans pretty darn close. That being said I’m willing to give it a go. So far I e found building from force draw curve and bend profile was the easiest for me. Getting close to plan dimensions in thickness and going from there. Being a unbacked selfbow it’s near impossible to get your thickness spot on. You have to be close to the plan dimensions in he beginning to achieve the end results in my opinion . So it has to be a collaboration of dimensions and bend profile and force draw .
willie:
Arvin,
there was a thread a while back about using computer programs, and I thought a followup workalong might be nice to demonstrate how to use Virtualbow. My contribution to the project would be......
demonstrate how anyone can test a ripping from the stave on the tiller tree, in order to arrive at more precise numbers to plug into Virtualbow for the actual build.
demonstrate with screenshots how I will plug your design ideas and test results into the program and show how different options or changes will affect the design, say for instance if you want to change limb lengths, widths, recurve, deflex or reflex.
--- Quote ---I’ve built from architectural plans my whole adult live and can follow plans pretty darn close.
--- End quote ---
Before computers were used to draw plans, we used to scale from plans to get dimensions that were not specifically noted, the success of doing this depended on the accuracy of the draftsman. Now a days computer drafting has made some things easier and better, but sometimes the way the plans are printed out means problems can be introduced unexpectedly.
I think Virtualbow can generate a force draw curve, but I do not have the technology at hand to print and mail full size bend profile curves. Visualbow will output these profiles at any draw length and actually let you move a slider a draw the bow to any drawlength on the computer screen. and screenshots can be made and posted to help "eyeball it" for comparision. Maybe someone with printing equipment available can help if full sized bend profiles are desired.
Anyone that wishs to follow along could load the program on their laptop, but it will not be neccesary for you to do so unless you want to.
--- Quote ---Being a unbacked selfbow it’s near impossible to get your thickness spot on
--- End quote ---
yes, with an unbacked selfbow, the back crown or a rounded belly complicates things. Virtualbow was primarily developed for use with FG laminated bows and can easily work without the FG lams so long as the limb crossection remains retangular. when crowned backs and bellies are part of the design, some adjustments will need to be made in the calculations thus starting thick will be prudent. how much extra thick will depend on our success at estimating the "adjustments". perhaps some additional work with the proposed test specimen will get us fairly close.
Zugul:
I would really like a thread like that, it would help me understand better how to design a bow specifically for any stave
Selfbowman:
Willie avcase has the force draw and bend profile in his computer format. He may be willing to share That with you. That needs to be worked out between y’all cause I’m not so smart so to speak.🤠I’ve got a couple of good staves left that I can get the backs almost flat. 2” wide. One almost 3” same wood as my broadhead record bow. Coming in a bit thick at first tiller I can hit the profile and force draw pretty easy. Well real slow and easy.🤠I’ll get with Alan
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