Ronald Valentine and his team are manufacturers of the smallest engines in the world. They have been manufacturing miniature model engines for over 30 years. The smallest model is less that the size of an American quarter coin. Nano Bee is the smallest, more than 3 times smaller than the Cox. Watch these two videos below – in the 1st you can see the Ronald who explains about his work and production of the smallest engines. In the second video you can see how to make flying shop rags.