Based on the success of the AH-56A Cheyenne , Lockheed felt confident enough to put the compound helicopter to commercial use. Lockheed also wind-tunnel tested a stowed-rotor design that would hopefully yield higher cruise speeds (pictured above).

CL-1026

Based on Cheyenne lift and propulsion technology, designs circa 1969. Cruise Speed: 230 mph (370 km/h) Gross Weight: 23,000 lbs. (10,430 kg.) Capacity: 30 passengers

Sources:
• "Straight Up and Away" Flying Review. May 1969: 53.