[FrankJ]

After thinking about this a bit... If you are ratcheting a chain drive, you have a design issue. The issue might be using too light of a chain to meet another design goal such as weight. Engineering is about trade offs after all. A couple of chain drives designs to think about that don't ratchet despite the high loads:

Bicycles especially full suspension bicycles. The slack side has a relatively light tension from the rear derailleur. Relatively light side loading will move the chain from sprocket to sprocket.

Motorcycles: You actually set a chain deflection so at rest the chain has no tension. This is needed because the C-C distance changes with suspension travel.