The Pratt & Whitney J58 (company designation JT11D-20) was a jet engine used on the Lockheed A-12, and subsequently on the YF-12 and SR-71 aircraft. ###>Le Pratt & Whitney J58 (ou JT11) est un moteur à réaction conçu pour propulser les avions à hautes performances Lockheed A-12 Oxcart et Lockheed SR-71 Blackbird.