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).
Comparison of horsepower output between an R.R. carburettor and a Polyrhoe carburettor on a 1500 type engine.
| Identifier | ExFiles\Box 147\5\ scan0014 | |
| Date | 9th January 1911 | |
| (3) consumption HORSE POWER WITH R.R. CARBURETTOR AND LARGE THROTTLE AND POLYRHOE. Revs. | A.{Mr Adams} | V.{VIENNA} | R.R. H.P. | Poly H.P. | Poly Carb. Best power. | R.R. Carb. dito ---|---|---|---|---|---|--- 500 | 65 | 65 | 26.7 | 25 | 14 | -1 750 | 63 | 95 | 37.8 | 35.2 | 14 | -1 1000 | 62 | 124 | 53.5 | 42.4 | 14 | -2 1250 | 58 | 39 | 64 | 53.4 | 15 | -2 1500 | 53½ | 48 | 71.3 | 60.5 | 15 | -2 1750 | 57 | 48 | 76.5 | 64.4 | 15 | -3 Handwritten notes: notches on its own quadrant ? goes off strong Taken by Hives on Test Plate 9/1/11 Compression 63lbs by gauge 24½ cubic ins. capacity. 1500 type engine. [Signature EH] 12/1/11 | ||