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).
Heat expansion test results for a cast iron piston and a thin aluminium piston.
| Identifier | ExFiles\Box 76\3\ scan0093 | |
| Date | 16th January 1919 | |
| Top Left: Mr Hives Top Middle: ~~H11/EBDC61B~~ Top Right: Laboratory. First Table Title: ~~Heat Expansion Tests on Cast Iron Piston. E~~ Table 1 Headers: Temperature. Diam at crown. Diam across Gudgeon Pin. Diam at rt angles to G.P. Height Heat at G.P. Height Heat at rt ang to G.P. Table 1 Data: 18 C. | 4.4905 O | 4.496 O | 4.995 O | 4.4155 O | 4.4155 O 50 C. | 4.492+.003" | 4.498+.002" | 4.498+.003" | 4.4175+.002" | 4.418+.0025" 100 C. | 4.494+.003" | 4.501+.003" | 4.501+.003" | 4.4200+.0025" | 4.420+.002" 150 C. | 4.496+.002" | 4.503+.002" | 4.503+.002" | 4.422+.002" | 4.422+.002" 200 C. | 4.499+.003" | 4.505+.002" | 4.505+.002" | 4.4245+.0025" | 4.424+.002" Table 1 Totals (Expansion): +.010" | +.009" | +.010" | +.009" | +.0085" Second Table Title: Heat Expansion Tests on Thin Aluminium Piston. E Table 2 Data: 20 C. | 4.486 O | 4.494 O | 4.496 O | 4.410 O | 4.411 O 50 C. | 4.490+.006" | 4.4985+.0045" | 4.500+.006" | 4.415+.005" | 4.415+.004" 100 C. | 4.497+.004" | 4.505+.0065" | 4.506+.006" | 4.420+.005" | 4.420+.005" 150 C. | 4.503+.006" | 4.511+.006" | 4.511+.005" | 4.4255+.0055" | 4.425+.005" 200 C. | 4.509+.006" | 4.5165+.0055" | 4.516+.005" | 4.430+.0045" | 4.430+.005" Table 2 Totals (Expansion): +.023" | +.0225" | +.020" | +.020" | +.019" Handwritten Note (bottom left): oil leaked from joint. Signature (bottom right): Hcb Footer (far left): R.R. 235 A (100 T) (S.E. 575. 16-1-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2354. | ||