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).
Letter from Maybach explaining operational issues with their gearbox.
| Identifier | ExFiles\Box 128\2\ scan0070 | |
| Date | 24th March 1931 | |
| Maybach-Motorenbau GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG • FRIEDRICHSHAFEN A.{Mr Adams} B. KONZERNFIRMA DES LUFTSCHIFFBAU ZEPPELIN FRIEDRICHSHAFEN A.{Mr Adams} B. FERNSPRECHER: NR. 174, 230, 231, 283 TELEGR.-ADR.: MAYBACHMOTOR FRIEDRICHSHAFEN-BODENSEE CODES: RUDOLF MOSSE, ABC 5TH EDITION 5 LETTERS ABSENDER: FRIEDRICHSHAFEN A.B., SCHLIESSFACH 25 BANKVERBINDUNGEN: DEUTSCHE BANK UND DISCONTO-GESELLSCHAFT ZWEIGSTELLE FRIEDRICHSHAFEN REICHSBANKGIRO-KONTO FRIEDRICHSHAFEN POSTSCHECKKONTO: STUTTGART 24935 Messrs. Rolls - Royce Ltd. Nightingalle Road Derby England. Translation without engagement. 28 MAR Recd IHRE ZEICHEN: Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/MJ. Expl.Dept. IHRE NACHRICHT VOM: 16/3,1931. UNSERE ZEICHEN: CB/J.1 FRIEDRICHSHAFEN A.B., DEN: March 24th 1931. BETRIFFT: MAYBACH GEARBOX. Dear Sirs, We have received your letter addressed to our Dr. Maybach informing us of the difficulties experienced with the gearbox you have constructed using the principles of our overspeed transmission. When proceeding as you have described, the crash must necessarily occur, as you will see from the following consideration: The car is in top gear and runs with considerable speed. If, after preselecting 3rd gear and short release of the accelerator, the engine speed (by again increasing the gas supply) is not increased to such extent that the opposite dog clutch could engage, it is constantly rejected because (see enclosed diagram 15911) the gears h - g run fast due to the high speed of the car, and the dog clutch d runs with much less speed corresponding to the low engine speed. - If the driver now changes from position 1 (3rd gear) to position 2 (top gear), the slowlier running claw d will engage with a bad crash with the claw of the gear e which also turns at a high speed owing to its being connected with h - g through f.{Mr Friese} This crash is due to the ..... VERKAUFSBÜROS: BERLIN W 62 LÜTZOWPLATZ 1 FERNSPR. LÜTZOW 1172, 1173 DRESDEN, PRAGERSTRASSE 46 FERNSPR. 22175 FRANKFURT A.{Mr Adams} MAIN, GALLUSANLAGE 2 FERNSPR. SENCKENBERG 32 687 KOLN A.{Mr Adams} RHEIN, DEICHMANNHAUS FERNSPR. RHEINLAND 223 169 TELEGR.-ADRESSE DER VERKAUFSBÜROS: MAYBACHMOTOR Drucksache Nr. 38 | ||