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).
Report comparing two design schemes for a thermometer bulb gland packing, addressing water leaks and binding issues.
| Identifier | ExFiles\Box 138\1\ scan0269 | |
| Date | 13th June 1936 | |
| -2- Rs{Sir Henry Royce's Secretary}/Std. &/JH. 13.6.36. Neither scheme gane any trouble with water leaks, but the scheme LeC.5060 has a defect in that it is difficult to tighten up the gland nut E.88227 due to the fact that it binds on the top washer E.88230 which in turn adheres to the gland packing E.88231 (owing to the compression forcing the rubber into the slot in the top washer). The gland packing itself therefore has to rotate and does so only with difficulty as the compression of the rubber causes it to bind on to the thermometer bulb. Summary. The scheme which we think should be standardised as soon as practicable is a similar one to Rm.{William Robotham - Chief Engineer}80 as being the simpler, cheaper and more effective one. In order to use up the existing thermometers however, the scheme LeC.5060 should be fitted to production cars, as soon as possible. The gland packings E.88231 and E.88228 should be modified in length, however to reduce the compression of the rubber by at least .080. In the meantime we propose to try this scheme using softer rubber and reducing the compression by only .040. The scheme Rm.{William Robotham - Chief Engineer}80 has been fitted to 32-EX through out its mileage in France todate, without giving any trouble, while a set of parts to LeC. 5060 has been despatched to G.W.H. in France for fitting to 22-C-V.{VIENNA} Rs{Sir Henry Royce's Secretary}/Std. | ||