Sinew Backing Question

[xpertbushman]

How much pounds does a layer of sinew backing add to a bow?

[Chadwick]

Usually it just adds a couple ounces, once the sinew is dry.
 

[PEARL DRUMS]

Too many variable to give a black and white answer. The width and length of the bow plays a part. The way you lay the sinew plays a part. The amount of sinew you call a layer plays a role. The amount of induced reflex plays a role. Most bows have 2-4 layers on them and on AVERAGE it may add 10-20#. Study up on all the Build Alongs and you will better understand sinew and how it works.

[Eric Garza]

Do you mean pounds of draw weight or do you mean the actual weight of the sinew itself? Either way, Pearl Drums nailed it. There are too many variables to give a precise answer. Depends on how much surface area is covered, how thick the sinew layer, how much reflex is induced, whether the bow is heat treated first, etc.

[osage outlaw]

I'm going to assume you are a beginner based on your other post.  I would suggest building a few more bows and work on improving your tillering skills before you get into sinew backing.  To get the most benefit out of sinew you need to design the bow for it from the very beginning.  Trying to gain a few pounds on a bow that didn't turn out how you wanted is not the best way to use sinew in my opinion. 

[bradsmith2010]

what Pearl drums said