Top Spinning for Over 50 Minutes

Description:  The top in this video continues spinning for 50 minutes with a single push. As amazing as that is it is still over six hours short of the world record. Students could design and test tops of their own that utilize either pushes or pulls.

Web Resources:  Spinning top - Wikipedia, Making a top that spins for 5 minutes - Instructables

This is my experimental top Nr. 15. It is an evolution and an extreme version of my top Nr. 10, which I expose here: https://www.youtube.com/watch?v=0rKrnUv6g8w In that video I explain what I have devised to make that top spin for a long time, and those considerations are still valid for the Nr.