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).
Diagram showing cracks found in the webs and bosses of various pistons.
| Identifier | ExFiles\Box 86\2\ scan0163 | |
| Date | 21th November 1933 | |
| BENSPORT UNIT B3 CHASSIS 4 B IV CRACKS IN WEBS AND BOSSES OF PISTONS. PISTONS EB 1299 IN A/R - NOT SPECIALLY TREATED Top Row Annotations (left to right): Nº 1 CRACK EXTENDS ACROSS WEB AND .2" DOWN THIS SIDE CRACK OCCURS ACROSS WEB AND .4" DOWN EACH SIDE Nº 2 CRACK EXTENDS .45 DOWN EACH SIDE OF WEB CRACK ACROSS FACE OF BOSS. .2" DOWN OUTSIDE AND .35" DOWN INSIDE Nº 3 CRACK ACROSS FACE .7" DOWN INSIDE AND .5" DOWN OUTSIDE OF BOSS Bottom Row Annotations (left to right): CRACK EXTENDS .6 DOWN THIS SIDE AND .2 DOWN OTHER. CRACKED ACROSS WEB AND .4 DOWN EACH SIDE Nº 4 CRACKED ACROSS WEB AND .25 DOWN THIS SIDE CRACKED ACROSS WEB AND .65" DOWN EACH SIDE Nº 5 CRACK ON THIS SIDE EXTENDS TO ENDS OF SAWCUTS AND .6 ON THIS SIDE CRACKED ACROSS WEB AND .6" DOWN EACH SIDE Nº 6 Stamp: ROLLS-ROYCE, LTD. PRINT ROOM NOV 21 1933 DERBY. | ||