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).
Data sheet detailing heat expansion test results for various cast iron and aluminium pistons at different temperatures.
| Identifier | Morton\M3.7\ img007 | |
| Date | 27th June 1919 | |
| Heat Expansion Test on Cast Iron Pistons E.4237. Table 1: Headers: Temp., Dia. at crown, across Gudgeon Pin, right angle to G.P., Height at rt. angle to G.P. Row 1: Temp: 18°C | 4.4905" (0) | 4.496" (0) | 4.4995" (0) | 4.4155" (0) Row 2: Temp: 50°C | 4.492" (+.002") | 4.498" (+.002") | 4.501" (+.002") | 4.418" (+.0025") Row 3: Temp: 100°C | 4.494" (+.004") | 4.501" (+.005") | 4.503" (+.004") | 4.420" (+.0045") Row 4: Temp: 150°C | 4.496" (+.006") | 4.503" (+.007") | 4.505" (+.006") | 4.422" (+.0065") Row 5: Temp: 200°C | 4.499" (+.009") | 4.505" (+.009") | 4.508" (+.009") | 4.424" (+.0085") Total Expansion: | +.010" | +.009" | +.010" | +.008" Heat expansion tests on Aluminium Piston E.6806. Table 2: Headers: (Implicit from table 1) Row 1: Temp: 20°C | 4.486" (0) | 4.494" (0) | 4.496" (0) | 4.410" (0) | 4.411" (0) Row 2: Temp: 50°C | 4.490" (+.004") | 4.4985" (+.0045") | 4.500" (+.004") | 4.415" (+.005") | 4.415" (+.004") Row 3: Temp: 100°C | 4.497" (+.011") | 4.505" (+.011") | 4.506" (+.010") | 4.420" (+.010") | 4.420" (+.009") Row 4: Temp: 150°C | 4.503" (+.017") | 4.511" (+.017") | 4.511" (+.015") | 4.4255" (+.0155") | 4.425" (+.014") Row 5: Temp: 200°C | 4.509" (+.023") | 4.5165" (+.0225") | 4.516" (+.020") | 4.430" (+.020") | 4.430" (+.019") Total Expansion: | +.023" | +.0225" | +.020" | +.019" | +.019" Heat Expansion Tests on Aluminium Pistons E.17764. Table 3: Headers: (Implicit from table 1) Row 1: Temp: 16.9°C | 4.496" (0) | 4.495" (0) | 4.495" (0) | 4.3982" (0) | 4.398" (0) Row 2: Temp: 50°C | 4.501" (+.005") | 4.501" (+.006") | 4.501" (+.006") | 4.4045" (+.0063") | 4.4045" (+.0065") Row 3: Temp: 100°C | 4.507" (+.011") | 4.506" (+.011") | 4.506" (+.011") | 4.411" (+.0128") | 4.411" (+.013") Row 4: Temp: 150°C | 4.512" (+.016") | 4.511" (+.016") | 4.511" (+.016") | 4.417" (+.0188") | 4.416" (+.018") Row 5: Temp: 200°C | 4.517" (+.021") | 4.516" (+.021") | 4.517" (+.022") | 4.422" (+.0238") | 4.421" (+.023") Total Expansion: | +.021" | +.021" | +.022" | +.0238" | +.023" | ||