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).
Blueprint with specifications and performance graph for a Tropic-Aire Universal Model Car Heater.
| Identifier | ExFiles\Box 137\1\ scan0226 | |
| Date | 14th December 1936 | |
| TROPIC-AIRE UNIVERSAL MODEL CAR HEATER SEAMED TUBE ELEMENT, OVAL Cu. TUBES 3 ROW STAGGERED, Cu. GILLS SLIGHTLY CORRUGATED. Nº OF TUBES = 35 (FRONT & BACK ROWS = 12 TUBES EACH, MIDDLE ROW = 11 TUBES) Nº OF GILLS = 48 SIZE OF TUBES = ¾" x ⁹/₃₂" SIZE OF GILLS = 6⅛" x 2½" x .006" THICK (APPROX) PITCH OF TUBES = ½" ROW PITCH = ²⁹/₃₂" 4 BLADED FAN DRIVEN BY A 12 VOLT MOTOR. FAN DIA. = 6" CONSTANT WATER FLOW = 2 GALLS/MIN. ELEMENT LENGTH = 2½" ELEMENT HEIGHT = 6⅛" (BETWEEN TANK) ELEMENT WIDTH = 6⅛" ELEMENT WEIGHT = 3 LBS 1½ OZS MOTOR = 1 LB. 6¾ OZS TOTAL WEIGHT OF HEATER = 9 LBS 14 OZS WEIGHT OF FITTINGS (LESS HOSE) = 1 LB. 5¾ OZS WATTS VOLTS DISSIPATION "LO" "HI" ON RHEOSTAT VOLTS OR WATTS AIR FLOW. CU.FT/MIN. B.TH.U's/Hᴿ/120°F.{Mr Friese} TEMP. DIFFᶜᵉ AIR IN TO WATER MEAN JHD | ||