Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 212
the former, it is claimed, runmore quietly, but, if curved too much, will not work so well ap-ainsta high pressure as the latter form. The relative proportions of a fan wheel vary somewhat in thecase of different makes. The following are averages taken from fansof different sizes as made by several… … Fig. 143. Centrifugal Fan with Casing. 171 102 IIEATIX(; AND VFATILATION
Architecture · Building · Carpentry
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