Main Discussion Area > Horn Bows
My horn bow build-a-long
stuckinthemud:
I have only sinewed 1 bow so I am no expert but I think you can apply a new layer of sinew at any time as long as you do everything properly. My question is whether you need to apply any more - if the calipers show the thickness is correct then aren't you best leaving well alone?
bownarra:
This is why you need to weigh, very accurately, the sinew bundles. Make absolutely sure they are the same for both limbs. Apply them evenly and you won't have problems with too much ,too little etc...
Another very important part is to make sure there is the same amount on either edge of the limbs. If not then the bow will twist as it's drawn and you won't be able to get a straight bow out of it.
The last layer of sinew must not have 'violations' where you removed some. The last layer absolutely must be one whole layer. I know you can get away with it on wooden bows but not hornbows, the ends will lift, maybe not straight away but over time they will lift.
When I've taught friends to make hornbows I tell them from the very start do not expect your first attempt to be a fantastic shooter....even with somebody on your shoulder it is all too easy to make a mistake! It's a journey learning to make hornbows and the beginning can be frustrating! There is no magic to it BUT it can take a while for all the subtleties to sink in and realise how important ever single step is :)
Anyway good luck and don't stress about it!
DC:
But is there any problem applying another layer now?
bownarra:
File/sand everything down to perfectly even thickness both limbs. Do the finishing work to almost final thickness with 60 grit paper, then finish off with 80/120grit and the freshly exposed sinew will stick properly.
Make sure to size with either very thin 5% glue or hot water just before laying down the new stuff. Also where you are working should be hot to avoid any adhesion problems.
DC:
Thanks. It's going to have to wait a couple of weeks to get the shop warm. :D
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