Clintonville, Wis.-based Performance Conversions has received an STC for installing 751-shp Czech-built Walter M601E-11 turboprop engines and five-blade Avia propellers on the King Air C90-1, C90A, C90B, C90SE and E90. The conversion, approved last April on the basic C90, also decreases cabin noise, takeoff distance, routine maintenance costs and downtime for engine maintenance, according to the company.
The business jet market has continued its spectacular rise, while turboprop shipments grew modestly and piston deliveries dropped sharply, according to first-quarter aircraft delivery stats released today by the General Aviation Manufacturers Association. Industry billings increased 16.1 percent, to $5.3 billion, an all-time high for the first quarter, though overall shipments were down by 7.5 percent.
LoneStar Propjets of Waco, Texas, has received an STC to replace the Pratt & Whitney Canada PT6 turboprops on the King Air 90 through C90 series with Prague-designed Walter M601E turboprops and Avia Hamilton five-blade propellers. The converted airplane, known as the “Power 90,” has a “substantial increase in both climb and cruise performance,” according to LoneStar.
AOG Air Support of Kelowna, B.C., Canada is undertaking a program to convert Cessna 208 Caravans from their original 675-shp P&WC PT6 to the 751-shp Walter M601E turning a five-blade Avia propeller. The company, which expects to complete the program in about 12 months, said the Czech engine and propeller will improve the turboprop single’s performance on both wheels and floats. Conversions are expected to cost $400,000.
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