Karem Unveils Variable-Speed Tiltrotor For U.S. Army JMR Demo
By Graham Warwick email@example.com
Source: AWIN First
Inventor Abe Karem designed the precursor to the Predator unmanned aircraft and the (now Boeing) A160 Hummingbird long-endurance unmanned helicopter with its optimum-speed rotor. He formed Karem Aircraft in 2004 to develop the OSTR concept.
From 2005-2010 Karem studied a version of the OSTR weighing more than 200,000 lb. under the Army-led Joint Heavy Lift (JHL) effort. The TR75 had two 75-ft.-dia., variable-speed rotors. Lockheed Martin teamed with Karem on JHL, which was eventually shelved for lack of funding.
The company is continuing private-venture development of two commercial OSTR aircraft, the 90-passenger AeroCommuter and 180-passenger AeroTrain.
[Editor’s Note: A160 typo corrected]