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).
Trial report detailing the physical dimensions, weights, and performance of a Tropic-Aire Universal Model Car Heater.
| Identifier | ExFiles\Box 137\1\ scan0225 | |
| Date | 18th December 1936 | |
| File Derby 1158 18th December, 1936. TROPIC-AIRE UNIVERSAL MODEL CAR HEATER. Trial No. L. 634. PHYSICAL DIMENSIONS Overall length: 9.1/4" Overall Height: 9.3/4" Overall Width: 8.1/4" Element length: 2.1/2" Element Height: 6.1/8" (Between tanks) Element Width: 6.1/8" Dimensions of Motor: 3" dia. 2.3/4" overcasing 3.5/8" overall Fan diameter: 6" (4 blades) WEIGHTS Weight of Heater: 9 lbs. 14 ozs. Weight of Element: 3 lbs. 1 1/2 ozs. Weight of casings: 5 lbs. 5 3/4 ozs. Weight of motor: 1 lb. 6 3/4 ozs. Weight of fitting parts (less hose): 1 lb. 5 3/4 ozs. TRIAL DETAILS Volts: 12.0 Watts.: 17.1 Water flow - Galls per min.: 2.0 Water press. ins. water: 5.55 B.T.Us. at 120°F.{Mr Friese} T.D.: 6,370 Air flow cu. ft. per min.: 109 AT 12-VOLTS MOTOR PERFORMANCE WITH STANDARD 20° Angle bus HEATER FAN. R.P.M.: 1410 Equiv. B.H.P.: .0061 Watts. taken: 24.36 Motor efficiency: 18.7% | ||