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Quest for Performance: The Evolution
of Modern Aircraft
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- Part I: THE AGE OF
PROPELLERS
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- Chapter 7: Design Trends
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- Power Loading
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- [157] The power
loading data shown in figure 7.6 appear to have nearly constant
values for the upper and lower bounds. Within these bounds, the
transport and bomber-type aircraft have power loadings that vary
from about 12 pounds per horsepower in 1928 to 8 to 10 pounds per
horsepower by the 1950's. Low-performance aircraft have a higher
upper bound value of the power loading of about 16 pounds per
horsepower although the venerable Piper Cub J-3 had a power
loading value of about 19 pounds per horsepower. The lower bound
of the power loading is formed by fighter aircraft, which tend to
have power loadings in the range from 5 to 6 pounds per
horsepower. These low values of power loadings have, through the
years, been dictated by the rate of climb and maneuvering
performance characteristics required in fighter-type aircraft.
Present-day general aviation aircraft have power loadings that
vary from nearly 16 pounds per horsepower for the very
low-performance type of pleasure or training aircraft to about 8
pounds...
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- [158] Figure 7.6 Trends in power loading of
Propeller-driven aircraft.
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- ...per horsepower for the high-performance
Beech King Air 200 (at low altitude).
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