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).
Status report on Wraith III and Wraith Ripple engine units, detailing testing, modifications, and component parts.
| Identifier | ExFiles\Box 161a\3\ scan0224 | |
| Date | 19th June 1939 | |
| -9- Wraith III Units. W.III.No.1 - On test for general development. W.III.No.4.- On test for general development. W.III.No.5. - Fitted in 28.G.VI. W.III.No.6. - Fitted in 27.G.VI. W.III.No.8. - Fitted in 25.G.VI - Rm{William Robotham - Chief Engineer}'s car. W.III.No.9. - Fitted in 29.G.VI. W.III.No.10.- Fitted in 14.B.V. for 15,000 miles trials - Continental chassis. Wraith Ripple Units. W.R.No.1. New Unit instructed in HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel}6/BA.14.4.39 3.250 dia bore - The main items being, a.{Mr Adams} Crankcase T.H. in L.5. alloy. b. Crankcase L.H. Std. c. Standard V.C.M. Crankshaft. d.{John DeLooze - Company Secretary} EW.2170 Pistons - Aerolite. e.{Mr Elliott - Chief Engineer} EW.2179 Cylinder Block. f.{Mr Friese} EW.2180 Cylinder Liners. g.{Mr Griffiths - Chief Accountant / Mr Gnapp} EB.4845 Exhaust Valves to PD.40S. h.{Arthur M. Hanbury - Head Complaints} EX.S.768 Camshaft. i. SCD.1038 Oil Filter EX.S.1259 Assy. j.{Mr Johnson W.M.} Flywheel GB.4758. W.R.No.2. Late B.V. No.6 Unit, converted to Wraith Ripple No.2 by fitting 3.250 dia bore Cylinder Block. Remarks. Passed to test 12.6.39 fitted with new set of split skirt pistons. Conn.Rods with Vandervell Brgs. Double Valve Springs to Nos.4.5.& 6 Cylinders. Anticipate completing and passing to test July 10. Fitted in 12.B.V.Chassis. continued. | ||