The Rolls-Royce RR300 is a
turbine
A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced can be used for generating electrical ...
aircraft engine
An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...
(turboshaft/turboprop) developed for the light
helicopter
A helicopter is a type of rotorcraft in which Lift (force), lift and thrust are supplied by horizontally spinning Helicopter rotor, rotors. This allows the helicopter to VTOL, take off and land vertically, to hover (helicopter), hover, and ...
/general aviation market. Rated at up to 300
shp (224 kW) at take-off power, the RR300 is a rebadged and downrated variant of the
Rolls-Royce Model 250-C20.
Design and development
The Model 250-C18 certified in 1965 was rated at a similar power level to that of the RR300, but over the last forty years subsequent sub-models have become more efficient and produce substantially more power. For instance the Model 250-C40, with an overall pressure ratio of 9.2:1 at an airflow 6.1 lb/s, develops 715 shp.
The RR300 mates a scaled-down
centrifugal compressor
Centrifugal compressors, sometimes called impeller compressors or radial compressors, are a sub-class of dynamic axisymmetric work-absorbing turbomachinery.
They achieve pressure rise by adding energy to the continuous flow of fluid through th ...
from the Model 250-C40/47 to a
combustor
A combustor is a component or area of a gas turbine, ramjet, or scramjet engine where combustion takes place. It is also known as a burner, burner can, combustion chamber or flame holder. In a gas turbine engine, the ''combustor'' or combustion ...
and turbine similar to that of the Model 250-C20, replacing the C20's complex six-stage axial/single-stage centrifugal compressor. The RR300 retains the look and layout of the Model 250 from which it is derived.
[FAA TCDS]
/ref>
The RR300 is the second attempt to develop a lower-rated version of the Model 250, coming 20 years after the 350 shp Allison Model 225 of 1987.[
The five-seat Robinson R66 light helicopter features the RR300 as a turboshaft engine, Robinson having originally intended on utilizing the standard Model 250-C20. Rolls-Royce has also announced the signing of Memorandums of Understanding with Enstrom, MD Helicopters, RotorWay and Schweizer to discuss future applications of the RR300. In March 2013, the engine was named as the power plant for the new Scott's Bell 47GT-6. The 47GT-6 will be based upon the 47G-3B-2A type design and produced by Scott's Bell 47, the current holder of the Bell 47 type certificate.
FAA type certification for the RR300 was achieved in February 2008.]
Applications
* Robinson R66
* RotorWay 300T Eagle (Planned, apparently canceled)
* Scott's - Bell 47GT-6
* Innova Helicopters C630 (Planned)
Specifications (RR300)
See also
References
External links
Rolls-Royce RR300 Official page
{{Rolls-Royce plc aeroengines
2000s turboshaft engines
RR300