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).
Specification sheet for a Goshawk Front Spring, Drawing No. 53332.
| Identifier | ExFiles\Box 106\1\ scan0008 | |
| Date | 23th February 1925 guessed | |
| COPY. GOSHAWK SPRING - Front 12 1/2% Stiffer. Drawing No. 53332. Loads. 550, 600, 650 lbs. Span. 38" Eccentricity of centre bolt 1". Width. 1.75" (1.70 at eyes). Free Camber. (eye centres to top of main plate) - 2.60". Loaded " " " " " " " " " - 0.35". Deflection due to load. 2.25" Eyes both solid. Plates. 9 as follows. Lengths. Eccentricity of centre bolt. Thicknesses. 550 lbs. 600 lbs. 650 lbs. 38" plus eyes. 1.00" .25 .25 .25 36. .95 .22 .22 .23 31.7/8 .84 .21 .22 .23 27.3/4 .74 .21 .21 .22 23.3/4 .64 .20 .21 .22 19.7/8 .54 .19 .20 .21 16 .44 .19 .20 .20 12.1/4 .35 .18 .19 .20 8.1/2 .25 .18 .19 .19 Clip Plates. 3 & 7. Clip Centres undecided. | ||