Main Discussion Area > English Warbow
Starting dimensions for yew warbow
willie:
Will
--- Quote ---Whether that's due to being under water for 400 years we don't know, but I've got a niggling feeling that tiller shape wasn't too important for them
--- End quote ---
Interesting observation about the MR bows.
my question about width relates to tiller shape at the tips with that thicker tip, but is a bit of a moot point if their were quite a variety of tillers shapes found with the MR bows.
Do the MR reproductions (the ones that tried to be faithful to the original dimensions) seem to be highly strained bows? if they were actually shot at shorter than previously presumed lengths, what would the average draw weight be at say 28"?
willie
Del the cat:
You can approximate quite simply by assuming draw weight is linear and ignoring brace height.
Take 160# at 32", 160/32=5 pounds per inch.
So at 28" it would be 140#
Note, I said this is an approximation which experience has shown to be reasonable, (so I won't enter into any discussion or justification for my figures, as I have no interest in "having the last word" ::)).
Also note there were many arrows of approx 28" length on the Mary Rose.
All warbows are by deffinition highly strained!
I think there may be some miss-use of the term "tiller shape". There is the shape of the unstrung bow, and the shape of it at full draw. AFIK the Tiller shape refers to the full draw shape, and of course very few of the MR bows have been taken to full draw. The odd shapes of some of the staves (some have huge recurve) is largely unexplained and debated, this is however not "tiller shape" as far as I understand the term.
Again, I won't enter into any discussion or justification for this assertion, as I have no interest in "having the last word" ::).
Del
willie:
Del,
I appreciate your comments, and am certainly not trying to encourage a debate. I am just a dumb yankee that is developing an appreciation for a famous traditional bow design, and hopefully, some day I can find some yew and develop a appreciation for is enduring special qualities.
Is there room in this discussion for some more dumb questions?
If you were to reproduce a typical MR bow from yew, how much set would be considered normal for the design?
And how much allowance for overdraw,(beyond 28") would you expect the typical MR bow to withstand? would set become excessive @32? How much set is considered excessive with yew warbows?
I know, the concept of overdrawing a warbow strains more than my mind, I can barely pull over 60 anymore :)
willie
WillS:
Wood quality and bow quality determine much of what you're asking.
For example, the record-breaking self yew bow that Ian Coote built based on MR bows is 175lb at 32" and Joe Gibbs shoots it at 32" regularly and it's still got some reflex I believe. There have been MR replica bows posted on here heavier than that with little to no set at all. There are of course also countless MR replica bows that are much lower in weight with all sorts of amount of string follow.
It's slightly too open a question to answer really. Some of the MR bows themselves had lots of string follow (we can't know if it's set or just string follow of course) and plenty of them had masses of reflex. None of it actually matters because even bows with lots of set can shoot well.
sieddy:
175#@32"!!! :o
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