Page 28 - Volume 11 Number 12

other, but under the cowlings thatprovidedextendedcomponent
new, lightweight, improved turbosuperchargers were installed
life and allowed the TSIO-541- E1C4 to develop maximum rated
The Model A60 and Model B60 Duke were upgraded versions of
the original Model 60 and sold well throughout the 1970s and into the early 1980s. Beech Aircraft’s Salina, Kansas, division assembled and delivered nearly 600 examples of the Duke during a period of 14 years before production was terminated. (EDWARD H. PHILLIPS COLLECTION)
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horsepower at a higher altitude. Although maximum speed was unchanged at 286 mph, service ceiling increased to 35,800 compared with 30,800 feet for the original Duke. In addition, fuel economy was improved and the cooler operating temperature of the turbosuperchargers were beneficial and served to increase engine longevity.
The cabin of the Model A60 also received a facelift, with new selections of interior fabric and leather, and the pressurization control system was revised to provide smoother control of the cabin altitude. The A60 remained in production until the 1974 model year, when it was replaced by the Model B60. The A60 had sold well, however, with 23 built in 1970, 27 in 1971, 28 in 1972 and 43 in 1973.
DECEMBER 2017