Clifford Development and Stevens Aviation have expanded their partnership to jointly market and support Clifford Citation 550 and the S550 engine conversions.
The conversions can be enhanced with the optional Rockwell Collins three display ProLine 21 IDS, which is certified in a Dual AHARS/Turbulence Radar configuration, according to company officials.
Clifford Development has certified 35 improvements as part of the C550/S550 Williams engine installation Supplemental Type Certificate (STC) including: an Ametek digital engine display or an optional Rockwell Collins three display Pro Line 21 IDS System, heavy duty BFG brakes and a dual FADEC system certified to July 2007 standards. The Williams FJ44-3A engines are thermodynamically rated at 3,000 lbs. (with takeoff flat-rated thrust of 2,820 lbs.) versus the original engine’s 2,500 lbs. rating. With this modification, the typical Citation 550/S550’s basic operating weight is reduced 200 lbs., officials note.
Based on the Pilots Operating Handbook Supplement, the re-engined 550 has a 22 minute time-to-climb to FL430 versus the current one hour and 37 minute step-climb profile, an 18% increase in max cruise speed and a 59% increase in NBAA range with four passengers. The modified Citation II’s range is 2,192 nautical miles.
The re-engined Citation S550 has a four-passenger NBAA range of 2,515 nautical miles – a 49% increase. It also has a 12% increase in long-range cruise speed with a 34% reduction in fuel cost per seat mile.
Stevens will provide installations at its Greenville, S.C. (GYH) location and will provide additional product support at its Denver, Colo. (BJC) and Dayton, Ohio (DAY) locations.
The Citation 550 and S550 engine conversions are priced at $2,345,000 for 2009 installations. This price includes engines, engine core credit, digital engine instrumentation, Clifford Development aircraft improvement package, installation labor and training. The Rockwell Collins three display ProLine 21 IDS System with Dual AHARS and Turbulence Radar is priced at $438,000.