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).
Investigation report into the causes of and solutions for overheating in the Paulin Streamline car's interior.
| Identifier | ExFiles\Box 161\1\ scan0228 | |
| Date | 11th October 1938 | |
| 1380 ab20 1245 W/P. To Sr. from Rm{William Robotham - Chief Engineer}/Std. Rm{William Robotham - Chief Engineer}/Std.3/MH.{M. Huckerby}11.10.38. OVERHEATING OF BODY INTERIOR - PAULIN STREAMLINE CAR. At the request of Rm.{William Robotham - Chief Engineer} we proposed to carry out some investigations with regard to excessive heat of car interior on the above car while it was in Derby, but owing to the short period which it remained here we were not able to do more than make a single test run in it and examine the car. We arrived at certain conclusions however, which you may or may not have deduced yourself already - however we give them in the hope that they may be of some assistance. (1) The main source of the heating of the interior is heat conduction through floor boards and carpets - the sheet metal floor boards became very much hotter than on the standard car and this is thought to be due to the undersheeting of the car. (2) There was no discernible evidence of hot air leaking into the car through floorboards etc. (3) A good deal of heat is transmitted to car interior via various side portions of the dashboard which are exposed and not covered with noise insulating material as on the standard car - incidentally this must also result in the transmission of a good deal of noise. (4) It appeared possible to ventilate the car quite adequately with the scuttle top ventilator except at low car speeds, but this ventilator still allowed a layer of hot air to remain close to the floorboards - we think that two scuttle side ventilators would help considerably in this direction. (5) The under bonnet temperature which we measured is not appreciably different from the standard Bentley car. Summarising, our suggestions (in order of importance) for improving interior conditions on the Paulin car are - (a) Dispense with undersheets if possible - we understand from Rm.{William Robotham - Chief Engineer} that these do not affect the speed of the car. | ||