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).
Comparative testing of 5 1/2 x 7mm and 6 x 7mm radiator tubes for the F.2.B series.
| Identifier | ExFiles\Box 15\1\ Scan136 | |
| Date | 13th August 1929 | |
| X7250. To Hm.{Capt. W. Hallam - Head Repairs} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to WOP. BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} 8/MJ.13.8.29. X7778. X7250. With reference to your Hm{Capt. W. Hallam - Head Repairs}14/W12.8.29. If BY.{R.W. Bailey - Chief Engineer} will order the necessary tubes we will make a definite comparative test for F.2.B series to see that we have lost nothing by going to the 5 1/2 x 7 m.m. tubes. As however, the present 6 x 7 m.m. tubes are definately unsatisfactory we cannot see the use of building up more of them for replacement purposes. As one test has already been made on the S.S. radiator showing that there is no difference in cooling between the 5 1/2 x 7 m.m. and the 6 x 7 m.m. tubes, we suggest that the new radiators for the Repair might be made in parallel with our own, as only a few will be required. They can then be issued on the completion of our test. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} We are issuing a standardisation sheet. | ||