Quick Answer
Spindle length and thickness can significantly impact bow drill performance. A spindle that is too short may not generate enough friction, while a spindle that is too long may be difficult to rotate. Optimizing spindle length and thickness is crucial for efficient fire starting.
Optimizing Spindle Length
A good starting point for spindle length is between 6-9 inches (15-23 cm). This range allows for a comfortable grip and sufficient leverage to generate friction. A spindle that is too short may not generate enough heat, while a spindle that is too long may be difficult to manage.
Spindle Thickness and Material
The thickness of the spindle should be between 1/4 to 1/2 inch (6-13 mm). A thicker spindle will provide more friction, but may be difficult to rotate. A thinner spindle will be easier to rotate, but may not generate enough heat. The material of the spindle should be durable and resistant to wear, such as hardwood or bamboo.
Techniques for Adjusting Spindle Length and Thickness
To adjust the length of the spindle, you can use a piece of string or twine to tie the spindle to the bow’s handle. This will allow you to adjust the length without having to re-drill the spindle. To adjust the thickness of the spindle, you can use a piece of sandpaper or a file to shape the spindle to the desired diameter.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.