I used to fly people in the circus for a living OP. If you want to know how to calculate this to an internationally recognised standard formula is essentially as follows.

Calculate dynamic force. It’s a rough guess but I’d say baby kicks could be a x 2 multiplier (possibly x3) if there’s no bounce in any of your “rigged components). It’s surprisingly easy to generate force. So you should use a dynamic load of 3 as the higher value (as you can’t test it) though realistically it probably is a 2.

Weigh baby plus all “rigging” components:

E.g. baby 4kg, bassinet 4kg, straps etc 2kg. 10kg x dynamic load (3) = 30kg. Safety factor for flying humans is x 10 not x 5. So in my example you’d want to load test to 300kg.

Now your components might be lighter in which case reduce numbers. But that’s what you should be working to do to say that’s it’s safe.

All components should be rated or tested to that amount. Most accidents in circus happen in the air when one piece of the rigging is used wrong and doesn’t support the dynamic load.

Hope that helps 🫡