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 Goshawk blower test with one diffuser passage blocked to ascertain if a magneto drive shaft could be taken through for the Merlin engine.
| Identifier | ExFiles\Box 179b\3\ img364 | |
| Date | 25th March 1933 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Aln. c. to Sg.{Arthur F. Sidgreaves - MD} for. c. to Rg.{Mr Rowledge} By.{R.W. Bailey - Chief Engineer} c. to Lr.{Mr Ellor} c. to Mr. Jaques. Hs{Lord Ernest Hives - Chair}/Aln.1/WJ.25.3.33. X6655 V6550 GOSHAWK BLOWER WITH BLOCKED DIFFUSER PASSAGE. We have completed the test on the Goshawk blower with one of the diffuser passages blocked and attach curves shewing the result compared with that for the standard conditions. The object of the experiment is to ascertain whether a shaft could be taken through the diffuser for the magneto drive in the Merlin engine. The effect of the obstruction is shown from the curves to be not very serious at deliveries below those corresponding to reasonable boost pressures. At 100 lbs/min. the boost drops from 16.8 "Hg. to 15.8" and above this the discrepancy becomes considerable. The conditions of this test represent the worst case. In taking a shaft through the diffuser, various arrangements are possible which would allow a better flow for the air and these are being looked into by the Design Dept. It appears therefore that the scheme generally should be quite practicable. We would add that during the above test we checked the correctness of the calculated curve of carburetter depression given in our last report Hs{Lord Ernest Hives - Chair}/Aln.2/WJ.22.3.33. The result agrees so closely up to the flow measured that the calculated curve may stand without correction. Hs{Lord Ernest Hives - Chair}/F.J.Allen. Attached: One print. | ||