Williams International's three new engines on track to certify in 2008 September 24th, 2007

Williams International’s three new engines – the FJ44-4A, FJ44-3AP, and FJ33-5 – are all on track to certify in 2008. All three engines benefit from state-of-the-art aerodynamics, next generation engine operating software, durability enhancements, and weight reductions that make each engine the thrust-to-weight and fuel economy leader in its size. Sizes range from 1900 to 3600 pounds of takeoff thrust.

“These engines not only provide the best performance in class,” according to Gregg Williams, President and CEO of Williams International, “they also give the customer the lowest cost of operation and best overall value. The improvements we’ve made also allow us to extend the time between overhauls.”
The FJ44-4A is being developed initially for the Cessna CJ4, and will be de-rated to 3400 pounds thrust in that application. The FJ44-4A engine’s superior thrust and fuel economy at cruise altitudes – where performance matters most – set it apart from any engine in its class.
One FJ44-4A engine continues flying on Cessna's test bed airplane, where it has met its performance and operability objectives. A second engine has accumulated 3000 equivalent flight cycles in accelerated testing, and a third engine recently passed induction system icing certification tests. The FJ44-4A has achieved its thrust-to-weight and fuel economy goals, and has done so at low temperatures allowing TBO to be extended to 5000 hours.
A “Plus” version of the successful FJ44-3A engine, the FJ44-3AP is being certified at 3000 pounds of thrust. The complete engine began testing last month at our Walled Lake, Michigan test facilities. The engine’s lower operating temperatures, lower fuel consumption, and extended TBO (4000 hours) have led to its selection on several airplanes, including the new Piper Jet.
The FJ33-5 is an uprated version of the certified FJ33-4 engine. The FJ33-5 will be certified next year for use in the-jet by Cirrus and in the ATG Javelin. Thrust has been increased more than 15%, raising the thrust-to-weight ratio above 6-to-1, the best among small turbofans. The FJ33-5 engine also boasts a major improvement in fuel economy and a 4000-hour TBO. This engine began testing in August 2007.

Williams FJ44 and FJ33 engines are renowned for their high performance and rugged reliability. They boast many advanced features pioneered by Williams and now being adopted by others in the turbine industry such as blisks (integral blades and disks), effusion-cooled combustors, a very low part count, and full authority digital engine controls (FADEC). They are also modular in design, allowing quick assembly and disassembly. “The modular design of our engines also allows us to offer on-wing hot sections for the convenience of our customers,” according to Frank Smith, Vice President of Customer Support for Williams. “We can turn your airplane around in as little as two shifts.”