It’s hypnotizing!!

Correct me if I’m wrong, but this engine is good at high rpm. Why not a hybrid system with an electric motor hight torque low rpm and a rotary engine at high-rpm ?

4 months ago I stopped washing my hair with shampoo. I wash my hair in 4-5 days with baking soda and apple cider vinegar. If it is not recommended for hair, what should I use instead? Some natural things...

Awesome!