The optimal angle for the arc of the rockers in a rocking chair depends on several factors, including your personal comfort, the rocking chair design, and intended use. However, a common angle that's often considered comfortable for rocking chairs is around 12-15 degrees.
To calculate the arc angle, you can use trigonometry. The tangent of the angle is equal to the rise (height difference between the fastener points) divided by the run (distance between the fastener points).
Here's how you can calculate it:
Tangent (angle) = Rise / Run Angle = arctan(Rise / Run)
Given that the distance between the fastener points (Run) is 24 inches, you can adjust the rise to achieve the desired angle. For example, for a 12-degree angle:
Angle = arctan(Rise / 24) 12 degrees = arctan(Rise / 24) Rise = 24 * tan(12 degrees) Rise ≈ 5.07 inches
This means the difference in height between the fastener points should be approximately 5.07 inches to achieve a 12-degree rocking arc.
Remember, these calculations provide a starting point, and you should also consider factors like the chair's design, your body's comfort, and personal preference. You might want to create a mock-up or prototype to test the angle before finalizing your design. Click here for further guidance, you will get more info!