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).
Test sheet for a spiral component detailing height and diameter measurements under various loads.
| Identifier | ExFiles\Box 95\2\ scan0224 | |
| Date | 16th July 1937 | |
| TEST SHEET. 488 THOS FIRTH & JOHN BROWN LTD. Date 16.7.37 ORDER No. Rali 241 c/o /pc/1 N 1360 SPIRAL DEPT. For Messrs. Rolls-Royce Ltd Order Drawing G 87692 Height free 9.875" With load of 574 lbs. -2-7-1 11cwt 1qr 7lbs = 7.255" Outside Diameter 3.065" Inside Diameter 2.225" Table Data: Columns: N010, N011, N012, N012 Row 'Height free': 9.875", 9.875", 10", 9.93. Row 'with 574 cwt. lbs': 6.375", 6.31", 6.375", 6.31" Row '1167': 5.125", 5.06", 5.125", 5.125" Row 'Home': 5", 4.93", 4.875", 4.875" Section .42 dia Mark Weight Coils 12 L.H. Passed this day Passed previously Total For THOS. FIRTH & JOHN BROWN LTD., | ||