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).
Analysis with calculations for the effect of altitude on a standard radiator's 'air temp to boil' figure.
| Identifier | ExFiles\Box 87\1\ scan0095 | |
| Date | 24th September 1934 | |
| FILE x740 ANALYSIS OF EFFECT OF ALTITUDE ON STANDARD "AIR TEMP. TO BOIL" RADIATOR FIGURE. For given radiator dissipating constant amount of heat, Let To = air temp. to boil at ground level " T = " " " given altitude " B = boiling point of water at given altitude " t1 = top water temp. at ground level ) These temps. " t2 = bottom " " " ) being corrected " t = mean " " " ) to 0°C. " to = air temp. at given altitude " d = ratio of air density at given altitude to air density at sea level For equal heat dissipation, temp. difference between mean water and air = t/d ∴ actual mean temp. = t/d + to Also temp. drop across rad. = (t1 - t2)/d ∴ Top water temp. = {t/d + to} + 1/2 {(t1 - t2)/d} ∴ Air temp. to boil = T = B - {(t1 - t2)/2d + t/d + to} + to = B - {(t1 - t2)/2d + (t1 + t2)/2d} - to + to since t = (t1 + t2)/2 = B - t1/d | ||