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Aviation History
1944
1944 - 2284.PDF
Advertisements FLIGHT NOVEMBER QTH, 1944 BEGINS i4t£ H/e€iA \ THE TEST BED TT is a well-known fact that the first few hours of an engine's "life" are the "• most critical. That is why manufacturers insist upon certain speed limits being observed if their guarantees are to remain valid. But only recently—and in still too few quarters—has it been realised that the life—and wear—of an engine begins, not in service, but on the Test Bed. No matter how careful the makers may be in degreasing, cleaning and polishing the component parts, once an engine starts running under its own power, and lubricating oil begins to circulate, foundry sand in the castings, and unsuspected abrasive dirt inherent in the surfaces is loosened and damage is done. Aero - engine manufacturers have learned this truth. Their Test Beds are fitted with Vokes Oversize Filters. The Oil Filter has been known to extract 5 lbs. of dirt and sludge from an engine running non-stop for 137 hours. Models are made in single and twin form with capacities of from 15 to 3,000 g.p h. in engine oil, and from 30 to 6,000 g.p.h. in hydraulic oil. -FLIGHT • PHOTO VOKES LT.D LONDON S.W Pioneers in Scientific Filtration DESIGNERS, PATENTEES AND MANUFACTURERS OF AIR. OIL AND FUEL FILTERS AND SILENCERS. You can ensure that your engines leave the Test Bed in perfect condition by jil ting Vokes Oversize Air, Oil and Fuel Fillers and the I okes Oversize Crank Case Breather Filler. Like all their 3,000 models, these Fillers have an efficiency rating of 99'9 per cenl. ; and 25 years of scientific manufacturing experi ence is behind their production. lm«n»innm»«t mmimt.m _ "•' •'"
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