Photography Trick for Tillering

[4est trekker]

I read somewhere on TradGang about flipping images and then using them to help prescribe where to adjust tiller.  I had my wife take a picture of a recent pyramid bow I build at full draw on the tillering tree, copy and flip the image, and then overlay the two on top of one another.  The result is a double image of the bow, one facing one way, one facing the other.  If you cut the picture in half as I have below , you can easily see how both limbs line up (or don't!          (You can also see that my top two silencers don't line up...and I know, "Why do you need two sets of silencers?"     :confused:  )  

   

[scrub-buster]

That looks like a good idea.  What program did you use?

[Art B]

That same image will change when being drawn by hand (when using spilt finger and using heel pressure). The tillering tree can not duplicate the heel pressure of the bow hand. Take some time and study the full drawn pics of the bows posted on these board and pretty much everyone will show a greater bend just outside the lower fade area.

What's going to happen when you draw the bow by hand is that the inner third of the lower limb is going to receive extra strain while the upper limb will maintain it's correct tiller. Yes, the bow's tiller may look a little whacky at brace but will perfectly tillered at full draw.

However, I do think those tips will come into alignment at full draw. The problem associated with using a grip with any amount of heel pressure can be corrected by beefing up the inner third of the lower limb.

A tillering tree is fine for looking at bows tillered for three under or a low contact grip. But for the vast majority of us that uses a certain amount of heel pressure with our grip then the tillering tree is the wrong approach IMO. Getting your short string on early in the tillering process and setting the tiller by feel, using pics of full draw, or having and experienced eye watch will produce better results.

[Art B]

"Yes, the bow's tiller may look a little whacky at brace but will be perfectly tillered at full draw."

With that statement I meant to say that when adding extra strength to the inner section of the lower limb that the bow's tiller may look a little whacky at brace but should show perfectly tillered at full draw. ART

[Roy Steele]

I used pen lines for years.But thats a great idea.I'll give it a try.

[Hermann From Bavaria]

really good idea...

greets