Welcome to Karem Aircraft

Karem Aircraft specializes in development of advanced fixed-wing and rotary-wing aircraft, including prototyping and flight testing of high-efficiency tiltrotors, both manned and unmanned. Karem’s patented Optimum Speed Tiltrotor (OSTR) technology offers revolutionary vertical lift capability for both military and commercial applications. OSTR combines the fast, inexpensive, and safe operation of efficient fixed-wing airplanes with the robust hover capability of the best open-rotor helicopters.

Karem Aircraft is a participant in the US Army’s Joint Multi-Role Technology Demonstration (JMR TD) program and DARPA’s VTOL X-Plane (VXP) program. Other recent Karem contributions include work on DoD’s Joint Heavy Lift (JHL) and Joint Future Theater Lift (JFTL) programs. Several privately-funded initiatives are also underway at Karem, including development of the AeroTrain® and AeroCommuter® Optimum Speed Tiltrotors intended for commercial passenger transportation.


TR36TD delivers revolutionary rotorcraft technology for the Army’s Future Vertical Lift

VTOL X-Plane

TR36XP leverages a decade of development to create the most efficient VTOL aircraft ever


AeroTrain with OSTR technology is designed to change the way you travel.
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The TR75 Optimum Speed Tilt-Rotor (OSTR) meets or exceeds all Joint Future Theater Lift (JFTL) requirements.
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With offices in Lake Forest, California, Karem Aircraft is led by renowned aircraft designer, Abe Karem, widely recognized for his innovations in manned tactical fighter jets, aircraft retrofits and mission-conversions, and fixed- and rotary-wing unmanned aerial systems (UASs). Abe’s previous companies developed the Amber, the Gnat 750 (of which the General Atomics Predator-A is a derivative), and the A160 Hummingbird Optimum Speed Rotor (OSR) helicopter (now a Boeing product).