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).
Summary log of frame failures observed during dome testing, with six accompanying sketches illustrating the crack locations.
| Identifier | Morton\M20.2\ img009 | |
| Date | 1st April 1924 | |
| DOME TEST SUMMARY CONTD. N.DEV.TECH. FRAME FAILURES. Table: Frame No. | Running Time hrs min | Remarks. FT880 | 16 15 | Near-side Hanger 3rd cross-member cracked (Sketch 1). FT587 | 24 40 | Near-side channel member cracked (Sketch 2). F132 | 21 4 | N/side and O/side Ties cracked (Sketch 3). FT588 | 45 15 | Off-side channel member cracked at Trident box support bolts. (Sketch 4). F215 | 55 55 | Near-side joint pressing 5th cross member & rear spring tie-rod bottom... FT387 | 70 30 | Near-side channel member cracked (to Sketch 5). FT387 | 71 15 | Near-side channel member cracked (to Sketch 5). FT587 | 41 33 | Near-side channel member cracked (to Sketch 5). Sketches: Sketch 1. Crack Sketch 2. Sketch 3. Cracks Sketch 4. Cracks Sketch 5. Crack @ A Crack @ B Sketch 6. Crack Initials: AHP | ||