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).
Cost reduction for cylinder liner joint rings and inquiring about alternative materials and specifications.
| Identifier | ExFiles\Box 135\1\ scan0050 | |
| Date | 17th December 1936 guessed | |
| -2- 200 sets of Bentley connections. 1 set comprising................E.50462 - 2 off. E.52597 - 2 off. 200 sets of 25/30 connections. 1 set comprising................E.60179 - 2 off. E.61172 - 1 off. 200 sets of Phantom III. connections. 1 set comprising................E.87197 - 2 off. E.87203 - 2 off. With regard to the question of our cylinder liner joint rings (E.87743 lower and E.87908 upper) we find that these cost us respectively 11/6d. a dozen and 9/-d.{John DeLooze - Company Secretary} a dozen, the difference we presume being due to the use of "D" quality rubber on the former instead of DTY.10 as in the latter. In order to reduce the cost of these rings, we are going to look into the possibility of - (1) Increasing the permissible variation in volume of these rings, so that careful checking of the ring volume would not be necessitated. (2) Using a cheaper material which is effective, if such a material exists. We should like you to give us the following information as soon as possible. (a) Can you supply us with rings made of rubber material which would resist attack by oil, water and 25% Glycol/water solution and which would retain their resilience at temperatures up to 110°C. (i.e. when deformed into a groove, would not permanently take the shape of the groove, but would continue to exert a restoring pressure.) The question of expansion of the rubber under the influence of oil or water would not be very important. (b) If you can supply the material mentioned in (a), will it be more or less expensive than DTY.10 or "D" material.? (c) If the section of the ring was made circular, the volume altered to 6.0 c.c. and the limit on the volume altered to ± 1 c.c, what effect would this have on the price of the ring.) An early reply to these queries would be greatly appreciated. continued | ||