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).
Chart comparing engine overheating test results for the Silver Ghost and Hispano Suiza models under various ventilation conditions.
| Identifier | ExFiles\Box 24\5\ Scan065 | |
| Date | 14th May 1925 | |
| OVERHEATING TESTS T.5573 SILVER GHOST AND HISPANO SUIZA CONDITIONS OF TEST ATMOSPHERIC TEMPERATURE AT WHICH THE COOLING WATER WILL INEVITABLY BOIL DRIVING FOR SUFFICIENTLY LONG ON FULL THROTTLE AT THE SPEED AND UNDER THE CONDITIONS SPECIFIED N.B ENGINE WILL NOT BOIL AT TEMPERATURES COVERED BY LINES DEGREES CENTIGRADE 40/50 SILVER GHOST 48 TUBES 21 1/4" MATRIX HEIGHT ROAD SPEED 30 M.P.H. STANDARD VENTILATION 4X10 S HISPANO SUIZA LOUVRES STANDARD ROAD SPEED 30 M.P.H. Chart Labels: NO FAN STANDARD NO VENTILATION REAR SHUTTERS OPEN FRONT SHUTTERS OPEN ALL SHUTTERS OPEN LOUVRES BONNET BONNET TOP OFF BONNET SIDES OFF NO FAN STANDARD Stamp: ROLLS-ROYCE LTD. PAID 13 MAY 1925 DERBY. Handwritten: 14/5/25 RM{William Robotham - Chief Engineer} Watermark: W.H. ANSON & SON LTD | ||