The latest addition to its stable is the ‘ZR LITE’ modification for legacy Learjet 31s. It claims a 25% reduction in time-to-climb, 2,000ft – 4,000ft (610m – 1,220m) higher initial cruise altitude, plus a 0.2 increase in cruise Mach at equal power settings, 1% decrease in N1 and a 15° ITT reduction at equal Mach, a 7.2% decrease in block fuel at equal altitudes and Mach and a 5-11% increase in range.
The system has been designed to enhance all aspects of flight performance. Raisbeck has further enhanced the aerodynamics by re-contouring the trailing edge flap system with an extended chord. This drastically reduces the wave drag that exists at the trailing edge of the wing.
The original all-aluminium aft flap segment is removed with exception to the inboard six-inches and replaced with an all-composite version
Source: Flight Daily News