By Courtland D. Perkins, Robert E. Hage
First written in 1949, this can be a vintage textual content in aeronautical engineering. It covers plane functionality in reciprocating engine craft, propeller functionality, in addition to plane balance and regulate. this is often an outstanding booklet for the pro and the intense novice plane maker. it really is written in an easy and straightforward to appreciate demeanour. To get the main out of this publication, readers must have an realizing of differential calculus.
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Additional info for Airplane Performance, Stability and Control
The other possible powerplant is a rocket, which is beyond the scope of this discussion. 8 covers thrust propelled aircraft. The term turboprops usually refers to gas turbine engines which provide shaft power to drive a propeller for ﬁxed wing aircraft propulsion. Those providing power for a rotary wing aircraft, or helicopter, are referred to as turboshafts. 1 Comparison of propulsion requirements of shaft power and thrust propelled aircraft The equivalent thrust and equivalent SFC of a turboprop may be calculated, allowing ﬁrst cut comparisons of thrust and shaft power engines for a given application.
During descent the engines are throttled back to a ﬂight idle rating and the aircraft angle of attack reduced. Both these eﬀects reduce lift, and the ﬂight direction is below horizontal. A component of the weight now acts in the direction of travel, supplementing the engine thrust to overcome drag. With zero engine thrust this would be gliding. Turning requires centripetal force, provided by banking the aircraft to point the wings’ lift radially inwards. To support the weight the overall lift must be increased, hence also the thrust as drag thereby increases.
Advantages of a closed, as opposed to open, cycle include the following. No inlet ﬁltration requirements, or blade erosion problems. Reduced turbomachinery size, due to the working ﬂuid being maintained at a high pressure and density. In addition, helium oﬀers a high speciﬁc heat. The use of energy sources unsuited to combustion within an open gas turbine cycle, such as nuclear reactors or alternative fuels such as wood and coal. Helium oﬀers a short half life for use in radioactive environments.
Airplane Performance, Stability and Control by Courtland D. Perkins, Robert E. Hage
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