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).
Test report table detailing the performance and condition of plugs in various aircraft and marine engines.
| Identifier | ExFiles\Box 42\4\ Scan035 | |
| Date | 27th April 1927 guessed | |
| Marine or Aircraft type. Engine Type. Engine Position. No. of Washers. Position During Test. Type of Plug. First Fitted. Finally Removed. No of Times Fitted. Hours Flown Hr.Min. Time at Moorings. Exposure to spray. Conditions. IRIS IV. Leopard III. Port Nacelle. 2. 1,No.5.R.Cyl Inlet Plug. 1,No.5.F.Cyl Ex. Plug. K.L.G.F. 17. Non-coated. 9-5-32. 27-10-32. 4. 5- 40. 61 hours. Below normal. Very good. ". Centre Nacelle. 2. 1,No.4.R.Cyl Inlet Plug. 1,No.1.F.Cyl Ex. Plug. ". ". ". ". 4. ". ". Normal. Good. Broken. Stbd. Nacelle. 2. 1,No.1.R.Cyl Inlet Plug. 1,No.5.F.Cyl Ex. Plug. ". ". ". ". 4. ". ". Below normal. Good. ". PANTHER III.F. Panther. Centre. 3. 1,No.7.F.Cyl Inlet Plug. Lodge A.2. 21.4.32. 24.6.32. 3. 13-15. Nil. Severe. Broken. 1,No.5.F.Cyl Ex. Plug. ". ". ". 3. ". ". ". Corroded. 1,No.1.F.Cyl Inlet Plug. ". ". ". 3. ". ". ". ". FLYCATCHER. Jaguar IVC. Centre. 2. 1,No.5.F.Cyl Ex. Plug. Lodge A.2. 10.7.32. 12.9.32. 3. 21-15. Nil. Very severe. Corroded. 1,No.1.F.Cyl Inlet Plug. Non-coated. ". ". ". ". ". ". ". RIPON.III. Lion XIA. Centre. 3. 1,No.10.F.Cyl Ex. Plug. K.L.G. F.17. 21.4.32. 12.9.32. 6. 40-00. Nil. Normal. Good. 1,No.11.F.Cyl Ex. Plug. Non-coated. ". ". 6. ". ". ". ". 1,No.12.F.Cyl Ex. Plug. ". ". ". 6. ". ". ". ". SINGAPORE MK.II. Kestrel. E.C. Port. 3 } 3 }. Not Known. Plug washers sent away with aircraft. Not Known. BROOKE M.S (35 ft.). Brooke. 6. Various. Lodge C.3. 21.4.32. 19.10.32. 30. -. in service on the water during the whole of this period. Normal. Very good. TEST BENCH. Lion V & IIA. -. 6. Various. Various. N/A.{Mr Adams} N/A.{Mr Adams} 24. 40-00 running. -. Nil. Very good. | ||