From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Advertisement for Specialloid Pistons highlighting their features and benefits.
| Identifier | ExFiles\Box 148\4\ scan0304 | |
| Date | 4th October 1934 guessed | |
| SPECIALLOID PISTONS Highest Power Output • Less Cylinder Wear • Very Low Oil Consumption All you want to know about Pistons is in our new catalogue—send for a copy now ★ Diamond finish in place of grinding eliminates particles of abrasive matter becoming embedded in the skirt, thus preventing excessive wear. Circlip Fixing, for Floating Pins. Oil Control Ring in Skirt. Cast Relief and Oil Reservoir. Carries correct head thickness, scientifically determined by compression ratio, and piston diameter. Ribs join at the centre, carrying the heat away from the hottest part of the head. Explosion Thrust taken by vertical ribs radiating from Head to Gudgeon Pin Boss instead of the piston walls. A System of Eight Ribs ensuring strength, rapid heat dissipation, uniform expansion, and freedom from distortion. TELEPHONE HILLSIDE 2233 TELEGRAMS: SPECIALLOID LONDON SPECIALLOID LIMITED FRIERN PARK, NORTH FINCHLEY, N.12 Diamond Finished • Unbreakable • Wear Resisting THE HALL-MARK OF EFFICIENCY IS THE EXACTITUDE OF DETAIL | ||