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).
Page from a publication reviewing 1940 marine engines from manufacturers Sterling, Gray, Atlas Imperial, and Buda.
| Identifier | ExFiles\Box 133\3\ scan0122 | |
| Date | 1st January 1940 guessed | |
| Two Sterling Petrol engines drive the 47' "Sea Otter" 18 m.p.h. She was designed by John G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Alden and built by Quincy Adams Yacht Yard easily, and holding the seats without warping. Two Zenith carburetors are employed, similar to the Petrol carburetors, and these have integral flood cups and flame arresters of a type developed for and approved by the United States Navy. The clutch used on the Dolphin is a Sterling special, with 97 per cent reverse ratio in r.p.m.'s, and a 150 hp. reverse capacity, which is stated to be approximately three times the power that would be required of it in backing a boat. The largest engine on display is the Viking Six, of 8" bore and 9" stroke, which is rated at 425 hp. and actually pulls 448 hp. at 1200 revolutions. A number of these engines, when used for driving electric generators, furnishing propulsion for rail motor cars, have recorded over 500,000 miles. In Government motor boat patrol service, and in fire boat service, with salt water cooling, Viking engines have been working continuously since 1927. Sterling has continued with its unusual Crankless Diesel, which has United States Government type approval, and reports a number of installations in continuous service. Gray Gasoline and Diesel Engines The Gray Marine Motor Co., of Detroit, emphasizes continuity of design in its 1940 line, every one of the 27 gasoline engines being built to one basic engineering formula. The same is true of its 2-cycle Diesel motors which are offered in five models ranging from one to six cylinders, all having 4 1/4" bore and 5" stroke and a basic cylinder size of 71 cubic inches. Of the Diesels, which have been in production for two years, the newest is the 2-cylinder model, which is now shown for the first time. This model, developing 55 hp. at 2000 r.p.m., is calculated to fit the needs of any cruising boat between 26 and 35 feet and has important applications in work boat service, on reduction gear ratios up to 3.2:1. In the gasoline line, every 1940 Gray engine has the exclusive "individual porting and manfolding" design and other features which have become identified with Gray, including self-adjusting oil seals, independent distributor drive, low pressure "shell" bearings, and pressure lubricated tappets. A new type of reverse band, with moulded asbestos lining, is announced as standard for all 1940 models. In previous years, the reverse band has been constructed of solid steel in direct contact with the drum but the new Grays have the band faced with the asbestos lining, resulting, it is claimed, in longer service, more positive action, less manual effort, quieter operation, an absence of metal filings and less frequent adjustment. Two new gasoline engines are features of this company's exhibit, these being the Light Four, a 69-cubic inch job developing 16 hp. at 1800 r.p.m., and the Super-Six, with 330-inch displacement, with updraft carburetion, developing 145 hp. at 3200 r.p.m. Atlas Imperial Diesels Four Atlas engines, selected by the Atlas Imperial Diesel Engine Co., of Oakland, Calif., and Mattoon, Ill., as representative of the company's line, are on exhibit at the Palace. The smallest of these, a 3-cylinder Atlas Lanova, developing 15 hp. at 1800 r.p.m., is described in another section of this issue. The only other propulsion engine on exhibit is a 6-cylinder Atlas Imperial with 6 1/4" by 8 1/4" bore and stroke, which develops 135 hp. at 900 r.p.m. engine speed. It is fitted with reverse and reduction gear and, like all Atlas engines in the larger sizes, is started by compressed air. Approximately forty sizes of high speed, medium speed and slow speed heavy duty engines are produced by this company for marine propulsion. The line also includes many types of stationary engines, varying in size from 5 to 600 hp. Among these, and on ex- One of the three new gasoline engines exhibited by the Buda Company, of Harvey, Ill., is this HM{Capt. W. Hallam - Head Repairs}-326. It is a 6-cylinder model | ||