here is an engine idea i'd love to see come to fruition:
http://www.angellabsllc.com/index.html
no psru, oriented properly for aircraft use, very high power to weight ratio.
they only need some millions to do the final testing
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
http://www.angellabsllc.com/index.html
no psru, oriented properly for aircraft use, very high power to weight ratio.
they only need some millions to do the final testing