Main Discussion Area > Horn Bows
Egyptian Composite Bow
ecounter:
With all those horn layers and the reflex in the shape didn’t think I needed so much sinew but time will tell. Someone asked about weight #70 at 26 inches or did they mean actual weight of the overall bow?
bownarra:
Only the belly layer of horn is doing anything. The more reflex the more strained = the more important the sinew is. Less sinew and you may have run into the core breaking.
Yes I want to know the physical weight. This is a great indicator of potential performance.
ecounter:
Total weight is 1lb 8oz
bownarra:
Interesting a bow of your draw weight should be around 350 - 400 grammes for best performance.
If you ever made another then use a wood like hard maple for the core and jus use one horn layer.
Horn is around 1.3s.g., osage maybe 0.8 s.g. and maple more like 0.6s.g. if you were to 'swap' the osage and the other horn layers for maple. The bow would be much lighter in physical weight whilst still storging the same energy - this would led to higher efficency. You could likely have used 60 - 70 grammes of sinew to safely back the bow. Again sinew is heavy stuff around 1.3s.g. so you want to use the least amount possible.
Just some pointers for you. I totally dig your bow and think it is something to be very happy with :)
ecounter:
Thanks for the pointers! Next one I’ll try what your suggesting. This one was more of an experiment following the original cross section from the source article which admittedly seemed overly complex, especially for circa 1000bc
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