wood for a yumi-stile core
Hello,
I'd like to try that method that Jaap Koppedrayer and other uses of making a sandwich of bamboo with a core of bamboo and other wood/s.
I'm looking for a 45-50 pounds, 64-66 ntn 1 1/4 wide. I live in Europe, and I can find elm, ash, black locust, mulberry and few others.
Has anyone tried this type of bows/bowmaking?
Any help or suggestion is really welcome.
Thanks,
David
I'd like to try that method that Jaap Koppedrayer and other uses of making a sandwich of bamboo with a core of bamboo and other wood/s.
I'm looking for a 45-50 pounds, 64-66 ntn 1 1/4 wide. I live in Europe, and I can find elm, ash, black locust, mulberry and few others.
Has anyone tried this type of bows/bowmaking?
Any help or suggestion is really welcome.
Thanks,
David
Hi David,
if you want do build a Yumi, you should consider your height. I am 191cm tall and shoot a Yumi with 233cm (~92inches) ntn and 19kg (~40lbs) drawweight.
Modern Yumi for adult start at 221cm (87inches). The case is: if the Yumi is to short, it will have stringfollow and in worst case it will break during drawing. Another thing is, that the grip of a Yumi is far in the lower part and the string must not have an angle over 90? to the lower arm in full draw, as you can see at the attachment below, because the nock of a Yumi is only a "tenon" and the string-loop can slip off the nock.
Measurement for the lenght of a Yumi: height 150-165cm Yumi 221cm, height 165-180cm Yumi 227cm, height 180-195cm Yumi 233cm, height 195-210cm Yumi 239cm, etc.. As I sayed, this is usual today.
The width depends from your bowhand. 1 1/4inch (~32mm) is a little bit wide. 25-29mm (1-1,14inch) on the back at the grip is usual.
Hope you can do something with this for your construction!
Peter
if you want do build a Yumi, you should consider your height. I am 191cm tall and shoot a Yumi with 233cm (~92inches) ntn and 19kg (~40lbs) drawweight.
Modern Yumi for adult start at 221cm (87inches). The case is: if the Yumi is to short, it will have stringfollow and in worst case it will break during drawing. Another thing is, that the grip of a Yumi is far in the lower part and the string must not have an angle over 90? to the lower arm in full draw, as you can see at the attachment below, because the nock of a Yumi is only a "tenon" and the string-loop can slip off the nock.
Measurement for the lenght of a Yumi: height 150-165cm Yumi 221cm, height 165-180cm Yumi 227cm, height 180-195cm Yumi 233cm, height 195-210cm Yumi 239cm, etc.. As I sayed, this is usual today.
The width depends from your bowhand. 1 1/4inch (~32mm) is a little bit wide. 25-29mm (1-1,14inch) on the back at the grip is usual.
Hope you can do something with this for your construction!
Peter
Thanks Peter,
I don't want to make a yumi (I have one). I'm just looking for information on woods that can combine well for a core of a bow, made as a yumi-like method of construction, as Koppedrayer and Steve Thomson make.
Thak you for your answer, and happy to see that you also practice kyudo.
Are you going to Frankfort's seminar this summer?
Bye,
David
I don't want to make a yumi (I have one). I'm just looking for information on woods that can combine well for a core of a bow, made as a yumi-like method of construction, as Koppedrayer and Steve Thomson make.
Thak you for your answer, and happy to see that you also practice kyudo.
Are you going to Frankfort's seminar this summer?
Bye,
David
Hi David,
Sorry! If you laminate the middlepart with bamboo, I think you can use all woods you mentioned.
Probable I am in Vienna in summer. Good luck for Frankfurt.
Peter
Sorry! If you laminate the middlepart with bamboo, I think you can use all woods you mentioned.
Probable I am in Vienna in summer. Good luck for Frankfurt.
Peter