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).
Blueprint graph showing the frame distortion of an Essex Terraplane under various levels of applied torque.
| Identifier | ExFiles\Box 21\6\ Scan121 | |
| Date | 25th January 1934 guessed | |
| FRAME DISTORTION - ESSEX TERRAPLANE TORQUE APPLIED AT FRONT DUMB IRONS ANGULAR DEFLECTION 2°0' 1°40' 1°20' 1°0' 0°40' 0°20' 0 2300 LBS. FT 1833 1375 916 458 FRONT DUMB IRONS FRONT AXLE 38" 38" 38" REAR AXLE REAR DUMB IRONS 1" = 20" | ||