Blackhawk Modifications has received FAA approval for another XP engine upgrade option for Cheyenne I operators.
The new Supplemental Type Certificate (STC) allows for installation of the Pratt & Whitney PT6A-28 engines on the Cheyenne I series in place of the stock PT6A-11. The -28 engines, capable of 620 shp, are flat rated to 500 shp, which will allow full power settings to be carried to a much higher altitude, according to company officials. The new performance improvements include greater climb rates, lower time, distance and fuel to climb and faster cruise speeds. A Cheyenne I with this new Blackhawk engine upgrade will achieve the same performance levels as the Cheyenne II series frequenting 250 KTAS, a 25 knot improvement, officials say.
The Blackhawk STC is a bolt-on conversion that utilizes Pratt & Whitney Canada’s overhauled or time continued PT6A-28 engines or several variant -28 models that have been converted from PT6A-21 or PT6A-11 engines. The existing three-blade propellers can be retained or a four-bladed Hartzell or McCauley propeller is an approved option. The XP28 upgrade comes complete with a new Flight Manual Supplement with full performance charts.
Introductory pricing is based on core exchange and is set for the remainder of 2009 at $475,000.
For more information: Blackhawk.aero.