Hey guys, I need to get some feedbacks from all of you here. Do you guys think it is possible for an engine to have a very low exhaust gas temperature and does not need any coolant radiator? The aim is simple, with lesser heat rejected through exhaust gas and radiator, there will be more heat from either a gas turbine or piston engine to be converted into kinetic energy. US Army tank command initiated the research back in the 70s and with all the great results that they got, I am surprised why it has never been heard again. The paper can be found here linkinghub.elsevier.com/retrieve/pii/S0082078475803985 Someday we should thank these few Army researchers, they have done a lot for mankind.