Respect Kviljo, Respect Adb.
U both make beutiful bows. allthoug you do not agree on some fundamental teories. Now I am certainly not an expert on bows, but I am an engineer, and I follow both your arguments with great interrest.
I am not overly familiar with the Holmegaard design, and have not read much about it. But as an engineer I feel quite certaiin that noone have actually bend the wool in a 8000 year old artifact. Actually even a few hundred year old piece of wood will be very brittle even if stored under ideal conditions. Again I am no expert so please bear (or beer : )with me here. So if noone have bend this artifact, we do not actually know how the original did bend before it was put into the soil....
Now that being said, I did make a holmegaard look alike to my 4yo son allmost one year ago. This bow have taken much set which I only partially can blame on him not remembering to unstring the bow after shooting and leaving it strung overnight a couple of times. The nonbending outer limb is more than 1 third of the bows length. The nonbending outer limb, the bending inner limb and the nonbending hanlde section are all of equall lenght making them 1/5th of the bows n/n length. Its performance is fair for its drawlength and weight.
After reading Kviljos monolog early in this tread, I took this bow and slowly reduced the thicnkess and width of the outer limb until it started to bend just a little, and evenly. Still nearly all the bend is in the inner limb., The bend in the outer limb is not visible to the naked eye, but I have measured it. I was amazed of how much wood could be remooved from the allready narrow outer limbs.
The difference in performance was incredible. For his usual, heavy arrow (really very heavy for the draweigth as a real arrow thin enough for a 4yo boys draw weight woudl be very fragile) the difference was not very dramatic - about 20%, but I have an arrow made from the broken tip of a bamboo fishing rod. Very light and flexible. This was shot both before and after shaving, and after modification the shooting length was doubled.
Sadly the thin outer limbs could not withstand the usual handling of a 4yo so it broke the next day accompanied by a lot of tears.
Back to the argument from Kviljo, How could the bowyer know that the outer limbs where as light as could be unless he thinned them untill they just started to bend ?
No I want to ask a question that have come to my mind. If the outer limb of the Holmegaard did bend, even if it bend just a little. Is this a hybrid between a flatbow and a ELB ? Or is it even the precessor of the longbow we know from Englands history ?
Best regards
Ronald.