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).
Letter from Price's Patent Candle Company regarding the analysis of two oil samples, comparing them to their own 'Motorine B' oil.
| Identifier | ExFiles\Box 144\1\ scan0004 | |
| Date | 6th September 1910 | |
| (243X) J.V.W./H.F. All communications to be addressed to the Company. GRAND PRIZES PARIS 1889 AND 1900, ANTWERP 1894, BRUSSELS 1897, ST.{Capt. P. R. Strong} LOUIS 1904 LONDON, FRANCO-BRITISH, 1908, GRAND CROSS OF HONOUR, AMSTERDAM 1895 TRADE MARK Price's Patent Candle Company, Limited. Belmont Works, Battersea, London. S.W. Telegraphic Address, BELMONT, LONDON. CODES:- "A.L." 4TH & 5TH EDITIONS A.B.C. AND LIEBER'S. TELEPHONE No POST OFFICE 1560 WESTERN Railway Station (Passenger) Clapham Junction IN YOUR REPLY PLEASE QUOTE L.O.D. 6th September 1910. Messrs Rolls-Royce Limited, Motor Car Manufacturers Nightingale Road, Derby. Dear Sirs, We refer again to your letter of 27th ultimo and, having now received from our chemists their report upon the two samples of oil which you sent us, we have pleasure in handing you the undernoted particulars. | | No 1. | No 2. | Motorine B. | | :--- | :--- | :--- | :--- | | Specific Gravity @ 60° Fahr. | .880 | .873 | .896 | | Viscosity @ 60° Fahr (Redwood) | 703 | 983 | 5925 | | " @ 212° " | 42 | 48 | 90 | | Flash point open Fahr. | 430 | 500 | 500 | | Evaporation, 1 hour @ 370°F.{Mr Friese} | 8.14% | 7.58% | 0.49% | SPECIFIC GRAVITY. The salient points calling for consideration seem to be in respect to Gravity that both of your samples are distinguished by low Gravity which, assuming that such low gravity is accompanied by a satisfactory flash point, we regard as a merit as indicating a fine quality of oil. VISCOSITY. The viscosities of these samples have been determined,as on previous occasions, by a Redwood viscosimeter and we are struck, in regard to the new samples, by the very large reduction in viscosity both at 60 and at 212°F which we are disposed to regard as likely to affect the working value of the oil. The figures are exceedingly interesting if you compare them with the corresponding particulars given in ours of 22nd July. Recapitulating the results we find :- | | Your Sample No 479. | Your Sample No 1. | Your Sample No 2. | Price's Motorine B. | | :--- | :--- | :--- | :--- | :--- | | Redwood Test @ 60°F.{Mr Friese} | 26400 | 703 | 983 | 5925 | | " " @ 212°F.{Mr Friese} | 56 | 42 | 48 | 90 | | Ratio Viscosity @ 212/60 | 0.2 | 6.0 | 5.0 | 1.5 | We regard two considerations as essential in dealing with the Viscosity of oils 1st That the Viscosity at normal temperatures should be moderate in order to permit of easy flow through lubricators and connections. Handwritten Notes: Top right corner: Mr Playford Please read and return to O.C.Y / H.H Mr Baumann Read & return D.O. F.P. 27/9/10 Next to recipient address: No 1 - Havoline, (Redwood) light No 2 - Havoline, light Vol. C.h Left margin: x967 | ||