Helicopter Drive Systems and Hunting Tooth Gears

A video describing hunting tooth gears used in helicopter drive systems. Hunting tooth designs reduce noise and vibration and improve the longevity of gears. They do this by ensuring that every tooth in a gear pair meshes with every other tooth in the opposing gear.

link to my earlier video on helicopter drive systems:    • Helicopter Gear Reduction  

References
The Hunting Tooth and its Effect on Break-In, Stadtfeld, 2021, https://www.geartechnology.com/ext/re...

Prime Numbers are the Secret to Prolonged Gear Life, Lemmy, 2022, https://shoppress.dormanproducts.com/...

Kish Method for Determination of Hunting Mesh, Kish, 5/1/1997, https://www.geartechnology.com/articl...

Handbook of practical gear design, Radzevich, Dudley, 1994, https://books.google.com/books?id=NOq...

Investigation of Advanced Helicopter Structural Designs USAAMRDL-TR-75-59B , Korzun, 1976, https://apps.dtic.mil/sti/tr/pdf/ADA0...

Design, Manufacture, and Spin Test of High Contact Ratio Helicopter Transmission Utilizing Self-Aligning Bearingless Planetary (SABP), NASA Contractor Report 4155, Technical Report 88-C-009, Folenta and Lebo, 1988, https://apps.dtic.mil/sti/tr/pdf/ADA1...

Design And Development Requirements for Mechanisms, NASA-STB-5017B, 2022, https://standards.nasa.gov/sites/defa...

00:00 Intro
00:45 Establishing a Reference
02:10 Wear Pattern in a Non-hunting Tooth Gear
02:57 Wear Pattern in a Prime Hunting Tooth Gear
04:35 Wear Pattern in a Non-factoring Hunting Tooth Gear
05:40 Literature Review