If successful, the product could mean more work for a small engine-assembly line in Indianapolis that the Federal Aviation Administration certified in early 2008.
The RR500TS is the second iteration of a turbo-prop engine Rolls-Royce unveiled in 2008. A spokeswoman said the company is still looking for customers for both new engines.
The core of the RR500 is a scaled version of the RR300, which was launched in 2007 to power the Robinson R66 helicopter. Rolls-Royce's small-engine assembly line in Indianapolis is building and testing the RR300, and could simultaneously produce the RR500.