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).
Cause and recommendations for fixing leaking sunshine roofs.
| Identifier | ExFiles\Box 117\3\ scan0341 | |
| Date | 20th February 1941 | |
| To: Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/EAG. Rm{William Robotham - Chief Engineer}/EAG.3/RH.{R. Hollingworth}20.2.41. 1021 REPORT ON LEAKING SUNSHINE ROOFS We find that the chief cause for the roof's leaking is that the water outlet holes at the front of the roof are small, and that the cowls covering these also restrict the flow of water, particularly so when the cowls are formed in the drip channelling. Owing to the roofs being made as thin as possible, the fall of the outlet pipes is limited and any dust or rubbish that get into them, causes choking and the water to overflow inside the car, particularly when the car is standing. Referring to the roof on 9B. which has recently given trouble, we found that the offside outlet was stopped with an accumulation of dust and pieces of straw, which prevented the water from draining away, resulting in the water channel round the roof filling up and overflowing into the inside of the car. This body has separate cowls fitted which are small and restrict the flow of water from the drain tubes and any rubbish which may get washed into the tubes cannot get away. We recommend that ½" drain tubes should be fitted and particular care taken that the joints between the roof channels and the drain tubes should be properly cleaned off after welding; also that the flanges of the roof panels and the rubber against which the sliding panel closes should be kept clear of the holes, (we have found these overlapping on some cars). The cowls should be large enough so that the flow is not restricted. Attached is a print showing a section of the part of the roof on 9B. Lines in red show conditions when the cowl is formed in the drip channelling. Rm{William Robotham - Chief Engineer}/EAG. | ||