Download PDF by G. Kenneth Hawkings, Allan Mackintosh: Advanced Telescope Making Techniques Volume 2

By G. Kenneth Hawkings, Allan Mackintosh

ISBN-10: 0943396123

ISBN-13: 9780943396125

Complex Teleescope Making strategies that includes chosen Articles from the Maksutov Circulars relies upon The Massutov Circulars which have been edited over a interval of 21 years through Allan waterproof coat and allotted to Maksutov membership participants. The membership used to be initially geared up to make a mass buy of customized molded Maksutov corrector blanks however it quickly turned obvious publication used to be had to proportion details on optics and sensible glass operating to shut tolerances. finally, approximately 2 hundred variations of the Circulars have been disbursed to contributors. From this mass of fabric three hundred+ web page books have emerged which describe a variety of topics of curiosity to the person that has made a telescope and needs to profit extra approximately this attention-grabbing hobby.

The matters coated by means of bankruptcy are as follows:
Chapter 1. Grinding Tools
Chapter 2. Curve turbines, Generating
Chapter three. Small Lens Work
Chapter four. add-ons for Glass Working
Chapter five. Grinding and sprucing Machines
Chapter 6. Making and trying out Flats
Chapter 7. Telescope Construction
Chapter eight. Telescope Accessories
Chapter nine. Photography
Chapter 10. The Telescope Maker's Workshop.

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Extra resources for Advanced Telescope Making Techniques Volume 2

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Throughout the recirculation zones interior it can be seen that the fluid velocities are very low, which implies that these are regions of practically uniform pressure. The vector plots further illustrate the locations where the two sets of velocity measurements have been taken, aiming to provide a reliable characterization of the vortex breakdown structures. A better understanding of the internal flow structure can be obtained from a streamline map. Figures 5a and 5b show interpretive sketches, representing case 1 and case 2 respectively, constructed from the "streamline" contours, corresponding to the intersection of stream surfaces with a meridional plane.

These experiments can serve on one hand as a quantitative improvement of our previous more qualitative experiments (Egbers 1994) and on the other hand as a test for future quantitative measurements connected with the characterization of period-doubling phenomena. The results of previous experimental, analytical and numerical work on the stability in the spherical Couette flow as a function of aspect ratio and Reynolds numbers are summarized in § 2. The experimental apparatus and experimental methods used for this investigation are described in § 3.

1990, 1992) "- '- Yavorskaya (1980) --- present study (Re krill ~ present study (Retum') Fig. 2: Stability diagram: Overview of previous and present investigations on the critical Reynolds number as a function of the aspect-ratio. guturk (1975), Wimmer (1976), Yavorskaya (1980) and Nakabayashi (1983). BUhler & Zierep (1984) found new secondary instabilities for higher Reynolds numbers and medium sized gap widths. A survey of recent work on Taylor vortex flow in small and medium sized gap widths is enclosed in the 49 work of BUhler (1985).

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Advanced Telescope Making Techniques Volume 2 by G. Kenneth Hawkings, Allan Mackintosh


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