Overview

Data on manufacture and type

Manufacturer: Pratt & Whitney

Powerplant type: Reciprocating

Powerplant Ratings

Provided powerplant data is for uninstalled, sea level, static operations.

Normal Ratings
Max continuous:  
Take-off / rated: 336 kW 450 hp
Intermediate:  
Maximum:  
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

References

References and sources used

S-47 | S-47/R-4 Helicopter
Vinny Devine
Sikorsky Archives | Product History, Sep 19, 2017 (page 8)
Website
Very thorugh description and details of the R-4 series helicopter

Aircraft using the P&W R-985-AN-14B