New engine designs.
 

I was only able to read the first one, since my work computer is garbage. it isn't a new concept, as the British have used the Napier Deltic engine for many years (1950's) on several of the Naval Vessels. I will view the rest tonight when I get home.

Prototype Engines - Alternative Engine Architecture - Popular Mechanics

I did like from that spherical engine, also rotary is nice as there is no losses converting movement to rotational as there is in other piston engine designs.

I have had one design on my mind from when I was a kid, but there seem never be enough time to start experimenting with it, I have not seen similar yet, but also I'm not all too sure if it would be very good design.

this is the place to talk about it, there is a wealth of knowledge around this site, and a lot of people that could give opinions one way or the other. 1 design in particular that I've liked ever since reading about it is the Crower 6-Stroke Diesel