You're flying nowhere fast, in point of fact probably nowhere at all, without a reliable and efficient powerplant on your airplane. And while the unprecedented Wall Street surge and other factors have helped fuel the current business aviation boom, the miracle market has been effectively powered by new engines with better fuel efficiency and longer maintenance intervals.

Premier will reap experience behind 1,000 FJ44s.

"They've really expanded the market," says Richard Aboulafia, senior analyst and director of aviation studies at the Fairfax, Va.-based Teal Group.

As a further indicator of the value of synergy in today's aviation world, the two engine families are the fruit of partnerships involving Rolls-Royce. When it comes to leveraging existing technology, both in recognizing potential and in forming partnerships to fulfill it, "Rolls is a master," Aboulafia says.

The 2,300-pounds-thrust FJ44 has its roots in Williams International's F112 engine for the AGM-129 stealth cruise missile. It was produced in quantity during the years of the Reagan defense buildup, and subsequently made civil-aircraft durable via a Rolls-Williams redesign. It's offered now by Walled Lake, Mi.-based Williams-Rolls, Inc., a joint venture owned 85% by Williams. The engine is manufactured in Ogden, Utah.

Williams is to deliver the 1,000th FJ44 this week in Atlanta. The lightweight (448 lbs) powerplant, which is just 40.2 inches long, "brings the smoothness and economy of the turbofan to the small bushiness aircraft market previously served by the turboprop engines," says Rolls.

The engine's success may be gauged by its selection for Cessna's CJ1 and CJ2 CitationJet derivatives (the FJ44-1A and -2C, respectively), and on the Raytheon Premier I and Sino Swearingen SJ30-2, both of which employ the FJ44-2A.

"Everyone has a plan for the FJ44," says Aboulafia. "It's really increased capabilities at the low end of the market."

BMW Rolls-Royce has turned up the heat in the ultra-long-range business jet market.

"There was nothing in its class before," Aboulafia says of the BR710. Rolls-Royce, he says, was smart enough to hop on an opportunity BMW enjoyed in the form of German government cash and a land grant in the former East Germany, shortly after the breach of the Berlin Wall.

An engine that has found a home from home in scheduled service on the Embraer 145 and 135 regional airliners but has made new business jets possible is the 8,000-pounds-thrust AE3007. It was developed by Allison, now part of the Rolls-Royce family since 1995. The AE3007C powers the high-speed (470 knots sustained cruise) Citation X business jet.