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References: Drives and Standard Fan Arrangements

  1. Centrifugal fan - Wikipedia - Overview of centrifugal fan construction with a section on drive mechanisms, comparing direct and belt drive and noting where bearings sit. Useful background for this chapter's drive and impeller-position sections.

  2. Belt (mechanical) - Wikipedia - Explains V-belts, how the wedge-shaped section grips the sheave groove, and how pulley diameters set the speed ratio. Supports the chapter's sheave, V-belt and fan-speed calculations.

  3. Coupling - Wikipedia - Surveys shaft coupling types, including flexible couplings that tolerate small misalignment, and the alignment and maintenance issues they raise. Background for the chapter's coupled direct-drive Arrangements 7 and 8.

  4. Fan Handbook: Selection, Application, and Design (1998) - Frank P. Bleier - McGraw-Hill - Bleier writes from the viewpoint of a working fan application engineer, organizing fan knowledge around selection and installation decisions rather than aerodynamic theory, the same practical lens this chapter takes on drives and arrangements.

  5. Shigley's Mechanical Engineering Design - Richard G. Budynas and J. Keith Nisbett - McGraw-Hill - Its flexible-elements chapter sizes V-belt drives from tabulated belt ratings corrected by service factors, the systematic design-horsepower method behind this chapter's belt count worked example.

  6. FanPedia: The Fan & Blower Encyclopedia (PDF) - Twin City Fan - The chapter's primary source: arrangement drawings (pp. 20-29), impeller orientation (p. 30), shafts and couplings (pp. 79, 128-129) and arrangement technical descriptions (pp. 162-175).

  7. FanPedia online - Twin City Fan - The online edition of FanPedia, whose Fan Arrangements, Exploded Views and Technical Descriptions galleries show the arrangement drawings and descriptions this chapter cites, page by page.

  8. ANSI/AMCA Standard 99-16, Standards Handbook (PDF) - AMCA International - The AMCA handbook containing the drive arrangement drawings for centrifugal, axial and tubular centrifugal fans (sections 9 and 13), the numbering system this chapter's arrangement numbers come from.

  9. Fan Arrangements, Rotation, Discharge and Motor Position (FE-3900) - Twin City Fan - Engineering letter reproducing the AMCA 99-2404 centrifugal drive arrangements, including Arrangement 2 with bearings in a casing bracket, which FanPedia does not show.

  10. V-Belt Drive Selection for Fans (FE-1400) - Twin City Fan - Engineering letter on belt sections, sheaves, bushings, fixed versus variable pitch drives and service factors. A practical companion to the chapter's sheave, V-belt and drive service factor sections.