Pretty Awesome Engine Designs You Probably Haven't Hear Of

I love to study uncommon engine designs and this video jumped out at me, I think you will like it.
Shout out to Minds Eye Design on youtube for this video.

Listed starting with number seven.

Sabre Engine - Speed up to mach25

Free Piston Engine - power extracted through exhaust gases.

The 5 Stroke engine - Say what??

The Duke Engine - Star Shaped Reciprocater

Nissan DIG-T R - 500Horse Power-->3 Cylinders...

Huttlin Kugelmotor - Power out of a ball ;)

Free Valve Engine - Electronic Timing to the next generation.

Hope you enjoyed this video!