My Field Guide to Floor Tillering to Final Draw Curve: What Actually Works

As I sit in my workshop in Missoula, Montana, surrounded by the scents of fresh wood and the soft sounds of nature outside, I can’t help but reflect on my journey as a traditional bowyer. The passion for crafting self-bows led me down many paths, but one of the most critical elements is mastering the tillering process. Today, I want to share my field guide to floor tillering and achieving that perfect final draw curve. This is what actually works for me, and I hope it inspires you on your own bow-making adventure.

Understanding the Basics of Floor Tillering

Before working through the practical details, let’s clarify what floor tillering is. This technique involves shaping the bow's limbs on the floor with the bowstring attached to help visualize the draw curve as you go. I prefer this method because it allows for a more accurate representation of how the bow will behave when drawn.

The goal is to create a smooth, even curve throughout the bow’s limbs, ensuring optimal performance and comfort when shooting. A well-tillered bow not only looks good but performs beautifully, delivering power and accuracy with every shot.

What You’ll Need

Tool/Supply Purpose Approximate Cost ($ USD)
Bow blank (yew, maple, or osage orange) Base material for bow $20-$50
Tillering tree or floor space To hold the bow while shaping Free-$100 (if DIY)
Shaving horse For holding the bow while working $50-$150
Rasps and files To shape the limbs $10-$30
String material (Dacron or FastFlight) To make the bowstring $10-$20
Bow scale To measure draw weight $25-$50

As you can see, getting started doesn’t have to break the bank. I often find myself repurposing materials I already have, which adds a unique touch to my bows.

The Floor Tillering Process

Now, let’s talk about the steps I follow during the tillering process. I’ve learned through trial and error, and these steps work well for me:

  1. Prepare Your Bow Blank: Start with a properly seasoned bow blank. I prefer yew for its elasticity, but maple and osage orange work well too. Make sure it’s roughly 1.5” wide and ¾” thick to give you a good starting point.
  2. Initial Shaping: Begin by marking the center of the bow at 28 inches. From the center, taper the limbs gradually, keeping the tips thinner than the base. I like to use a rasp for initial shaping, which provides control and precision.
  3. Attach the String: Once you’ve achieved a basic shape, attach your bowstring. This is where the floor tillering starts. I usually use Dacron for durability during this phase.
  4. Flex It Out: With the bowstring attached, place the bow on the floor and pull it gently. I recommend drawing it back to 15 inches initially to see how the limbs flex. Look for any stiff spots and take note.
  5. Refining the Limbs: If you notice any stiffness, take your rasp or file and remove material from the stiffer limb. The goal is to create an even draw curve. I often spend hours at this stage, going back and forth between drawing and shaping.
  6. Check Your Progress: Use a bow scale to measure the draw weight at different lengths. I aim for a progressive weight increase. By the time I reach 28 inches, I want to see a draw weight of around 40-50 pounds, depending on the bow design.
  7. Final Adjustments: Once you’re happy with the curve, make final adjustments to the tips, ensuring they’re not too thick. A good rule of thumb is to taper the last 6 inches of each limb down to about ¼ inch in thickness.

💡 Ethan Ward's Rule of Thumb: Take your time during this process. It’s easy to get impatient, but rushing can lead to mistakes. Patience will yield a bow that performs beautifully.

Common Mistakes and How to Avoid Them

Over the years in my shop, I’ve encountered a slew of mistakes that taught me valuable lessons. Here are a few common pitfalls and how to sidestep them:

  • Over-tapering: It’s easy to get carried away and remove too much material. Always step back and assess the bow’s profile regularly.
  • Ignoring the Draw Curve: Don’t just focus on draw weight; pay attention to the curve. A bow can have the right draw weight but an uneven draw curve can make it unshootable.
  • Neglecting the Tips: The tips of the bow are essential for performance. Ensure they’re tapered and not overly thick.

FAQ

How long does the tillering process take?
The entire tillering process can take anywhere from a few hours to several days, depending on your skill level and attention to detail.
Can I tiller my bow without a tillering tree?
Yes! You can use any sturdy surface to lay the bow down and work on it. Just ensure it provides a stable platform for drawing.
What is the best wood for beginners?
I recommend starting with a softwood like pine or a hardwood like maple. They’re forgiving and easier to work with than tougher woods like yew or osage orange.

As I wrap up this guide, I hope you find the floor tillering process both rewarding and enlightening. It’s a journey filled with moments of frustration and triumph, but the end result—a beautifully crafted self-bow—is worth every effort. So grab your tools and start shaping your dreams into reality. Happy tillering!