Air Hybrid Engines

http://www.ukintpress-conferences.com/conf/10ex_conf/pdfs/Day_1_10_Stephen_Scuderi.pdf

http://cleantech.com/documents/forums/2009/xxi_san_francisco/presentations/presenting_companies/AchatesPower-DavidJohnson.pdf

http://www.tscombustion.com/Transonic_DT_CaseStudy.pdf