[namba209]

ADI or Anti-Detonant Injection was used extensivley on WW II aircraft, primarily the heavy bomber and cargo aircraft. It was a mixture of water and alcohol. The primary purpose was to allow the flight engineer to lean the engine out and inject the ADI to prevent holing the pistons. The ADI fluid in reality would make the mixture a lot more dense, resulting in much more power at the same RPM. IIRC the B-47 was the first production aircraft to use ADI on a jet engine powered aircraft, this was followed by the KC-135, the B-52, and the F-105. The F-105 was the only fighter aircraft to use ADI and was also the only aircraft that used ADI in conjunction with an afterburner. ADI was discontinued on the KC-135 and B52 when they were modified to use Turbo-Fan engines. They generated much more thrust than the axial flow turbine engines with ADI, at a lower power steeing. HTH.