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).
Failure of electrical horns in fog and troubleshooting water loss from the header tank.
| Identifier | ExFiles\Box 101\1\ scan0182 | |
| Date | 4th April 1936 | |
| GRY{Shadwell Grylls} Lillie Hall to W. 8500a GWH{George W. Hancock - Head Chateauroux}1/L/4.4.36. Hs.{Lord Ernest Hives - Chair} Electrical horns (wind type) - - - - - - - - - - We have nothing definite that we can give why the horns fail. The last two horns that failed we have tried all our known remedies without results. The horns ceased to operate in fog. We have no knowledge what is taking place. We suspect that the contact points become damp and do not make contact. Another feature reported is, that if the dome is screwed up too tight it distorts the mechanism and puts the horn out of action. We recommend that a man from Lucas's should come down and try and locate what is actually wrong. - - - - - - - Water Loss. - - - - - - - - - We specially mentioned that the loss was with the header tank full. We have been endeavouring to keep a higher water level. The valve has been carefully ground in and the spring tension increased. We are now maintaining a height of three inches from the filler cap and we are satisfied. The standard level is approximately this measurement, but we are not maintaining it. Hs{Lord Ernest Hives - Chair}/G.W. Hancock. | ||