Main Discussion Area > Horn Bows
hornbow project numpty questions
mikekeswick:
No the stiffest cross section is a rectangle. More material at the surfaces to resist tension and compression. The problem with a rectangular limb is the poission effect. The upturned edges on the bent limb then take more stress. The flat back/round belly cross section pretty much eliminates this problem but is less stiff than a rectangular section.
bjrogg:
Thanks for sharing this stuckinthemud, someday this is on my bucket list and I really haven't a clue so this is very helpful.
Bjrogg
stuckinthemud:
Big thanks to all who have/are guiding me along this path! I'm really struggling with the final dressing of the horn plate. I keep trying to tack it down to a base board to be able to perfect it but the centre bellies up when I tack down the ends. Any suggestions?
mikekeswick:
Steam it flat. Remember that it will spring back if you just clamp it between flat surfaces. I heat the horn then bend it past straight by hand, hold it there and then run cold water over it. It will 'set' very quickly into its new shape.
stuckinthemud:
Not a question, just an update. Rasped and scraped the plates down to 4.5mm, the hollow section has reduced to 2" length, giving a 13" length 35mm wide plus a 4" taper to the tip. Time to sort the core
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