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).
Notes from an interview with Carl A. Neracher regarding internal gear transmissions.
| Identifier | ExFiles\Box 19\3\ Scan131 | |
| Date | 11th January 1930 | |
| OY-2 Jan. 11, 1930 Mr. B.I. Day, CamachaHenry Royce's office in West Wittering, West WitteringHenry Royce's home town, Sussex, England. Cc- Mr. R.W.H. Bailey Mr. E.W. Hives Mr. Southern (Eng.) Mr. Burton Dear Mr. Day: INTERNAL GEAR TRANSMISSIONS Notes on Interview with Carl. A.{Mr Adams} Neracher. Jan. 9/30 Internal-gear twin-silent gearboxes are now 5 years old (in actual production) and are being produced in considerable quantity. Chrysler alone is producing 800 a day and the industry in general is probably doubling this. Chrysler - The latest development (of scarcely 12 mos. production) is the Chrysler transmission in two sizes of which the smaller has 40,000 sold, and the larger only a few thousand. The smaller is considered good up to about 175 lbs.feet and the larger 300 or more lbs.feet. These boxes have been rushed into production and there have been considerable manufacturing error. (Such as .012 error in spool-centers and as much as .030 error in lineability of bell-housing). Not withstanding this there has been almost complete acceptance by public and dealers and only a minute percentage of customer complaints (less than 1/2 percent). The worst boxes have been distinctly better than a good standard-type box, and the 40% of really good boxes have been almost indistinguishable even when hot between 3rd and high. Breakages have been actually produced on dynamometer though not on the road. The above torque figures are based on this dynamometer experience but the limits of load are not well known and depend on number of cylinders etc. and the smaller box is now being tried in a Packard Standard Eight of 250 lbs.feet torque to try to establish a "wrecking" figure from actual road-test. - continued - | ||