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).
The general running performance of the 4th Falcon X wet liner engine, detailing water leaks and power loss.
| Identifier | WestWitteringFiles\P\October1926-November1926\ Scan090 | |
| Date | 9th November 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/VH. c. to BJ. Wor.{Arthur Wormald - General Works Manager}✓ c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer}✓ ORIGINAL Hs{Lord Ernest Hives - Chair}/VHl/LG9.11.26. 4th. FALCON X, WET LINER ENGINE. X3804 X3996 GENERAL RUNNING. This has been so far satisfactory. We have not been troubled with piston seizures, and no internal water leaks have actually developed whilst on a duration run, since the aluminium rings have been fitted at the tops of the liners. An internal water leak developed at the base of A.6. cylinder (scheme B. LeC.2301) soon after the start of the 12 1/4 hrs. duration run (this was only a slight trickle and did not increase noticeably during the run). The slight leak into B.4. combustion chamber was apparent before the start of the 12 1/4 hrs. running with high compression pistons. This was the same at the end of the run as at the commencement, and the fact that it has occurred on one cylinder only, and that with the last liner to be fitted, points to a difficulty experienced in assembling the cylinder block. Total running time with wet liners to date - 37 hrs. Of this 24 hrs. has been devoted entirely to duration running. The loss of power experienced during the duration run of 12 1/4 hrs., can be attributed entirely to the gummed up piston rings and the faulty magneto, as mentioned in the daily report (5.11.26) When the engine was put back on the bed after no other work had been done on it beyond cleaning the pistons and fitting a new magneto and a new alum. ring in contd :- | ||