Get Aerospace Engineering on the Back of an Envelope (Springer PDF

By Irwin E. Alber

ISBN-10: 3642225365

ISBN-13: 9783642225369

Engineers have to gather “Back-of-the-Envelope” survival abilities to acquire tough quantitative solutions to real-world difficulties, really while engaged on tasks with huge, immense complexity and extremely constrained assets. within the case reviews taken care of during this ebook, we convey step by step examples of the actual arguments and the ensuing calculations received utilizing the quick-fire approach. We additionally show the estimation advancements that may be acquired by using extra distinct physics-based Back-of-the-Envelope engineering types. those diverse tools are used to acquire the suggestions to a few layout and function estimation difficulties bobbing up from of the main complicated real-world engineering tasks: the gap go back and forth and the Hubble area Telescope satellite tv for pc.

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Example text

Finally we recommend a simple electrical circuit design to power the robot kicking device that we plan to enter in our hypothetical high school science fair. Chapter 3 provides a more detailed examination and modeling of the Shuttle cargo mass problem first touched on in Chapter 1. We consider the Shuttle as a complex rocket launch system where the early testing philosophy showed a need for accurate launch performance models. In Chapter 3 we construct, using BotE methods, simple mathematical models for the Shuttle launch to orbit.

Note that the Orbiter has a crew of seven astronauts and that it carries all its supporting equipment into space plus the additional propellants needed for maneuvering. 1, is approximately 100,000 kg. We now define all of the relevant Shuttle system mass components and their interdependent relationships. In particular the initial takeoff mass is given by mi ¼ mpropellant þ mstructure þ morbiter þ mcargo where mpropellant ¼ mp=solid þ mp=liquid and mstructure % mstructure=solid motors þ mstructure=external liquid fuel tank ð1:3Þ Sec.

Linder found that engineering graduates—even from the best engineering schools—are not very good at estimation primarily because they lack the fundamental knowledge and skills required to make reasonable estimates. He also found that students were unable to perform BotE calculations because often they could not specify the correct engineering units for the quantities under study [6]. We will now present an example set of approximations, assumptions, and methods to calculate a BotE estimate for the 747 thrust problem.

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Aerospace Engineering on the Back of an Envelope (Springer Praxis Books) by Irwin E. Alber


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