Machine Design

Looking Back

10 YEARS AGO — AUGUST 20, 1998

Water-to-oil coolers lighten up for racing: A new series of heat exchangers cool the oil in racing engines using radiator water rather than air. The Series-Flow exchangers, from Fluidyne Racing Products, Ontario, Calif., are made of aluminum for lightness and can reside nearly anywhere on the car, rather than in front of the radiator as required in conventional units using air cooling. The exchangers provide 65,000 Btu of oil-cooling capacity without significantly boosting cooling-water temperature. A corrosion-resistant, stainless-steel version for heavyduty cooling is available for marine applications.

30 YEARS AGO — AUGUST 24, 1978
Glass-lined tank floats in a cradle: Engineers at De Dietrich (USA) have developed a truck chassis with a floating suspension to safely transports acids in a 30,000- gallon glass-lined tank over miles of rough roads. At no time is the tank rigidly attached to the trailer. Instead, it is cushioned within a fulllength, formfitting cradle lined with 2-in.-thick, shock-absorbing resilient cork. Four steel straps traversing the tank and eight threaded stud ends anchored to brackets on the trailer by spring-loaded nuts secure the tank to the cradle. To further reduce shock, the trailer wheels ride on an air-bag suspension. For added safety, the chassis has computerized antiskid brakes.

50 YEARS AGO — AUGUST 21, 1958
Inside or outside circuits on tubes are printed by a new process developed at J. Frank Motson Co., Flourtown, Pa. Circuits can be applied to almost any type of nonconducting tubular material including Teflon, Kel-F, epoxy, phenolic, polyester, silicone, glass, ceramic, and thermoplastics. IDs of at least in. are desirable for circuitry, but continuous coatings for shielding or conduction have been applied to tubes having a 0.020-in. ID. There is no limitation on tube length. Conductive inks are deposited from 0.0004 to 0.0015 in. thick. Circuits are stable up to 500°F.

Fluidyne Racing Products

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