Thank you for the opportunity to help you with your question!
Balance, arm spin and the head angle have a lot to do with successful spins. The head and arms will allow the spin the ability to be powerful and strong. If the twist of the hips, arms, and legs exert enough energy, the ballerina could spin for a while. To leap, the legs have to be strong and moving in the same direction. Having an equilibrium, or balance wilk make the spins elegant and stable.
Please let me know if you need any clarification. I'm always happy to answer your questions.