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Hehe - I am only interested to see if there are some people out there who would like to have a wooden compound. The option you suggest is obvious, because today there are only compound made with metal risers.
As far as I can see the problem with a wooden compound is strenght. I shoot a lever action bow, an Oneida Pro Eagle and even with that design of riser with no timing slot in the center of the riser and a back braced tech style riser ( just about the strongest lever action riser ever made) I would not trust a wooden construction. There would have to be carbon fiber in the riser,to reinforce it.
I really do believe that it is possible to make high performance compound bows with a wooden riser and perhaps even also with wooden limbs. Especially, if the limbs are close to parallel limb design. The one on the videoclip is nice too - though, I don't like the design too much - but it is indeed cleverly made.
I also belive that it is possible to make a lever action compound bow with a wooden riser, that is more than strong enough. For my self I am considering a camless version from Monsterbows - made of wood. I have not yet got a final agreement with Monsterbows, but they are very interested.
Of course you need to make designs, that will be strong enough - but using the right woods and laminations - and perhaps some carbon strips - it should be possible. I am wood engineer, so it will be difficult to convince me, that it is not possible... hehehe
Below is a design, that I have drawn.
Last edited by Thorvald; 02-04-10 at 04:05 PM.
Reason: Bigger version of picture of drawing.
How about using the priciples used in the Mosquito WWII fighter bomber. Lots of laminations glued together with epoxy. This method of construction at least has a proven ability of prioducing structures of comparable strenght and weight to aluminium. Add some carbon reinforcing and you could on to some thing.
Also I can't help feeling that the brace for the riser should be at the back of the bow not the front forces in compression are easier to deal with than forces in tension.
Perhaps - but the advantage of a front tension bar, is that then the forces are led away from the hand in the true direction of the limbs. But both front and back tension bars would probably work equally well. Of course wood is stronger in compression than in tension, so the front tension bar should perhaps be laminated, at least of 2-3 pieces. More over, as these bows are almost parallel limbs most of the forces would go straight down in the riser, with the tension bar helping to make the riser stiff. But I will try also to design a nice one with a back tension bar also.