Drawing illustrating defects in a cast metal component, showing a blow-hole and insufficient metal on a boss.
| Identifier | ExFiles\Box 9\5\ 05-page115 | |
| Date | 13th August 1937 guessed | |
| BLOW-HOLE APPROX .250 DEEP INSUFFICIENT METAL ON BOSS | ||
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).