Comparison table of characteristics for four different heater types.
| Identifier | ExFiles\Box 137\1\ scan0329 | |
| Date | 15th December 1937 | |
| Rm {William Robotham - Chief Engineer} /Std-9/MH. {M. Huckerby} 15.12.37. HEATER CHARACTERISTICS COMPARISON. 1 Heater Type | "S.2.RA" | "S.2.CA" | "C.C." | Harrison Twin Flow. Weight. | 6 1/4 lbs. | 6 1/4 lbs. | 8 1/4 lbs. | 6 lbs. Heat output | 4540 | 5200 | Approx. 6000 | 8000 Price (inc. discount etc.) | - | £2. 0. 0d. in 200 lots. | £2. 2. 0d. in 200 lots. | £2. 8. 0d. quantity unspecified. Air Flow (Cub.ft./min). | 66 | 83 | Approx. 85 | 135 Overall Width. | 7.5" | 7.5" | 7.5" | 7.5" Overall Height. | 7.5" | 7.5" | 7.5" | 8.25" Overall Length. | 4" | 4" | 5.5" | 8.25" | ||
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).