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).
Comparison of piston distances from Top Dead Centre (T.D.C.) for Goshawk 11 and Swashplate pistons at various crank angles.
| Identifier | ExFiles\Box 77\3\ scan0272 | |
| Date | 19th July 1923 | |
| X4224 DISTANCE FROM T.D.C. POSITION OF GOSHAWK 11. AND SWASH PISTONS FOR VARIOUS CRANK ANGLES. Handwritten: X4224 X.4369 Crank Angle. Goshawk 11. Stroke 4 1/2" Swashplate. Stroke 4 1/8" 10º .044" .031" 20º .173" .125" 30º .382" .277" 40º .659" .482" 50º .980" + .737" 60º 1.366" + 1.032" 70º 1.767" + 1.358" 80º 2.173" + 1.705" 90º 2.575" 2.063" 100º 2.95" + 2.421" 110º 3.3" + 2.768" 120º 3.615" + 3.094" 130º 3.88" + 3.389" 140º 4.105" 3.644" 150º 4.278" 3.849" 160º 4.401" 4.001" 170º 4.475" 4.095" 180º 4.5" 4.125" + Denotes correct to two decimal places only. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||