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).
Drawing of test pieces for comparing Barber Colman splines and plain taper with Woodruff keys.
| Identifier | ExFiles\Box 112\3\ scan0007 | |
| Date | 23th March 1938 guessed | |
| TEST PIECES FOR COMPARING BARBER COLMAN SPLINES AND PLAIN TAPER WITH WOODRUFF KEYS. 6.00 DIA. 1.00 A MINIMUM ALLOWED BY HOB. ALL DIMENSIONS OF THIS PIECE TO BE SCALED UP OR DOWN FROM PD 91 ACCORDING TO WHETHER D IS GREATER OR LESS THAN 1.200. | ||