Lockheed JetStar II

The Lockheed JetStar II, introduced by Lockheed Corporation in the early 1960s, was the company’s first foray into the business‑jet market and quickly became a benchmark for executive transport. Developed from the original JetStar prototype, the II version incorporated a more powerful thrust‑reversing system, upgraded avionics, and a stretched fuselage that added 20 inches of cabin length, allowing greater passenger comfort and luggage capacity. Powered by four Allison 250‑B17 turbofan engines mounted on the rear fuselage, the aircraft achieved a cruise speed of roughly 540 kt (630 mph) and a range of 2,500 nm, enabling nonstop transcontinental flights. Its distinctive “four‑engine, low‑wing” layout provided redundancy and smooth handling, while the spoiler‑type landing gear and the pioneering use of a dual‑circuit pressurization system set new standards for safety. The JetStar II gained popularity among corporations, government agencies, and private owners, symbolizing status and technological progress during the Cold War era. Though later eclipsed by more efficient twin‑engine jets, the JetStar II’s influence persists: it proved that a compact, high‑performance jet could serve both business and military transport roles, shaping the design philosophy of subsequent Lockheed business‑jet offerings such as the L‑1011 and the modern LM‑100J.

Lockheed Corporation

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