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Aviation History
1947
1947 - 1756.PDF
The Lockheed Mark VIengine-driven pump THOUSAND-HOUR TEST In view of the demand for the utmost reliability in power-assisted flying controls —such as in the " Lockheed " Servodyne—we recently subjected one of our standard Mark VI pumps to a thousand-hour test under severe type test condi- tions, during which the pump ran with consistently high efficiency. This pump has the high volumetric ates this pump, which in this system efficiency of 92 per cent, and delivers 2| g.p.m. at 3,000 p.s.i. at 3,000 r.p.m. The weight is only 71b 6oz. Further developments of this pump will give it a greater delivery at higher speeds and greater pressure, without increase of weight or bulk. The standard " Lockheed " hydraulic power circuit for aircraft—a valuable step towards simplification—incorpoV- normally idles unless automatically called upon to provide pressure for actuation or charging the hydraulic accumulator. Over 36,000 of these efficient seven- cylinder radial pumps have been pro- duced during the past four years. Their constant reliability has fully proved their value under Service flying conditions. AUTOMOTIVE PRODUCTS COMPANY LTD., LEAMINGTON SPA Fully Patented.
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