Vertical Fin

The SFC Oleofiltration system separates hydrocarbons from water. The technology combines a vertical-fin coalescing unit and a patented, amine-coated, oleophilic granule filtration system (the Oleofilter) into one system that can, according to the vendor, separate mechanical emulsions of hydrocarbons in water that are not treatable by conventional oil/water separators. The Oleofilter can also separate many chemical emulsions and reduce the concentrations of dissolved hydrocarbons. The technology is not commercially available. 

For the above estimate, total equipment costs for the SFC system was estimated at 35,540. This included the vertical fin coalescing unit, oleophilic ceramic granules, pumps, a pneumatic control system, and such ancillary equipment as a 2000-gal bulk tank with fittings, a skimmer, necessary switches, valves, piping, and wires (D11018P, p. 28). 

The aerodynamic problem is easily solved I suggest a pair of delta wings with e.p. closeto but slightly behind the c.g. of the missile. They need not be cambered but should have a definite dihedral angle to keep the device on an even keel, (figure 1). The vertical fins should be smaller and set back as far as possible. 

Natural convection from vertical finned surfaces of rectangular shape has been the subject of numerous studies, mostly experimental. Bar-Cohen and... 

Vertical Triangular Fins. For the vertical fin array in Fig. 4.23d, 5 is the fin spacing measured at the mid-height of the fin, so that 5W is the cross-sectional area of the flow channel formed by the sides of adjacent fins, the base of width 5, and the vertical plane passing... 

Circular Isothermal Fins on a Horizontal Tube. Tsubouchi and Masuda [269] measured the heat transfer by natural convection in air from circular fins attached to circular tubes, as in the configuration shown in Fig. 4.23/ Correlations for the heat transfer from the tips of the fins (see the figure for definition), and from the cylinder plus vertical fin surfaces, were reported separately. 

J. R. Welling and C. B. Wooldridge, Free Convection Heat Transfer Coefficients From Rectangular Vertical Fins, /. Heat Transfer (87) 439-444,1965. 

Advanced composites have been used most extensively in helicopters. Sikorsky s S-75 helicopter, for example, is about 25% composite by weight, mostly graphite-epoxy and aramid-epoxy composite materials. Composites are used in rotors, blades, and tail assemblies. Future military helicopters are likely to comprise up to 80% advanced composites by structural weight. Graphite-epoxy composites are likely to be used in the airframe, bulk-heads, tail bones, and vertical fins, while the less stiff glass-epoxy composites will be used in rotor systems. 

Champleve Enamelwarc. One type of vitreous-enamel artware a pattern is first cut into the base-metal but, where the pattern requires that enamels of different colours should meet, a vertical fin of metal is left so that the colour boundary will remain sharp, the two enamels not running into one another when they are fused. (French word meaning raised field .)... 

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