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).
Specification sheet comparing Clayton Car Heaters models S.2.CA. and C.C.
| Identifier | ExFiles\Box 137\1\ scan0212 | |
| Date | 15th December 1936 | |
| 1158 15th December, 1936. CLAYTON CAR HEATERS - S.2.CA. & C.C. TYPES. | NAME OF HEATER | CLAYTON S.2.CA. | CLAYTON C.C. | |---|---|---| | Trial No. | 635 | 621 | | Overall length | 4" | 5 1/2" | | Overall height | 7 1/2" | 7 1/2" | | Overall width | 7 1/2" | 7 1/2" | | Element length | 2.3/8" | 4" | | Element height | 6.1/2" | 6.3/4" | | Element Width | 6.1/2" | 6.3/4" | | Dimensions of motor | 2.1/2" dia. 3.3/4" overcasing 4.1/2" overall | 2.1/2" dia. 3.3/4" overcasing 4.1/2" overall | | Fan diam. | 5" | 5.1/4" | | Weight of Heater | 6 lbs. 8 1/2 ozs. | 8 lbs. 3 3/4 ozs. | | Weight of element | 2 lbs. 0 3/4 ozs. | 3 lbs. 9 ozs. | | Weight of casings | 2 lbs. 9 3/4 ozs. | 2 lbs. 12 3/4 ozs. | | Weight of motor | 1 lb. 14 ozs. | 1 lb. 14 ozs. | | Fitting parts (less hose) | 1 lb. | 1 lb. | | Volts | 12 | 12 | | Watts | 14.1 | 12.5 | | Water flow. galls per min. | 2.0 | 2.0 | | Water press. inches of water | 21.7 | 4.65 | | B.T.Us. per-hour at 120° F.{Mr Friese} T.D. | 5200 | 5250 | | Air flow cub. ft. per min. | 83 | 85 | MOTOR PERFORMANCE WITH STANDARD 20° ANGLE BUS HEATER FAN. | | | | |---|---|---| | R.P.M. | 1500 | 1500 | | Equiv. B.H.P. | .0073 | .0073 | | Watts taken | 21.2 | 21.2 | | Motor efficiency % | 25.7% | 25.7% | | ||