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).
Efficiency tests on a Marles Weller type steering worm and nut using different lubricants.
| Identifier | ExFiles\Box 28\2\ Scan193 | |
| Date | 24th May 1933 guessed | |
| Elliott Rolls Royce MARLES WELLER TYPE STEERING WORM AND NUT EFFICIENCY TESTS Left Margin Note: X-J-54 TABLE DATA: Column Headers: LOAD IN LBS, CASTROL R, WHITMORES COMPOUND, AMBER 'A', P 4 OIL, STD PII Worm. Under each lubricant, the columns are: INITIAL PULL (LBS., EFFY.), MOVING PULL (LBS., EFFY.). Row: LOAD 150 LBS - CASTROL R: Initial Pull: 2 1/2 LBS, 34% EFFY. | Moving Pull: 1 3/4 LBS, 49% EFFY. - WHITMORES COMPOUND: Initial Pull: 2 1/4 LBS, 31% EFFY. | Moving Pull: 2 1/4 LBS, 38% EFFY. - AMBER 'A': Initial Pull: 2 1/4 LBS, 38% EFFY. | Moving Pull: 1 1/2 LBS, 57% EFFY. - P 4 OIL: Initial Pull: 2 1/4 LBS, 48% EFFY. | Moving Pull: 1 1/2 LBS, 57% EFFY. - STD PII Worm: 75% Row: LOAD 300 LBS - CASTROL R: Initial Pull: 4 1/4 LBS, 40% EFFY. | Moving Pull: 3 LBS, 57% EFFY. - WHITMORES COMPOUND: Initial Pull: 4 1/2 LBS, 38% EFFY. | Moving Pull: 4 LBS, 43% EFFY. - AMBER 'A': Initial Pull: 3 1/2 LBS, 49% EFFY. | Moving Pull: 2 1/2 LBS, 69% EFFY. - P 4 OIL: Initial Pull: 3 1/2 LBS, 49% EFFY. | Moving Pull: 2 1/2 LBS, 69% EFFY. - STD PII Worm: (73% IN TUBE) Row: LOAD 600 LBS - CASTROL R: Initial Pull: 7 LBS, 49% EFFY. | Moving Pull: 5 1/2 LBS, 63% EFFY. - WHITMORES COMPOUND: Initial Pull: 8 1/4 LBS, 42% EFFY. | Moving Pull: 7 1/4 LBS, 47% EFFY. - AMBER 'A': Initial Pull: 7 LBS, 49% EFFY. | Moving Pull: 5 1/2 LBS, 63% EFFY. - P 4 OIL: Initial Pull: 7 LBS, 49% EFFY. | Moving Pull: 5 1/2 LBS, 63% EFFY. Row: LOAD 900 LBS - CASTROL R: Initial Pull: 10 1/2 LBS, 49% EFFY. | Moving Pull: 8 LBS, 64% EFFY. - WHITMORES COMPOUND: Initial Pull: 11 1/2 LBS, 45% EFFY. | Moving Pull: 10 LBS, 52% EFFY. - AMBER 'A': Initial Pull: 9 1/2 LBS, 54% EFFY. | Moving Pull: 7 1/2 LBS, 69% EFFY. - P 4 OIL: Initial Pull: 10 1/2 LBS, 49% EFFY. | Moving Pull: 8 LBS, 65% EFFY. Row: LOAD 1200 LBS - CASTROL R: Initial Pull: 12 1/2 LBS, 44% EFFY. | Moving Pull: 10 1/2 LBS, 66% EFFY. - WHITMORES COMPOUND: Initial Pull: 19 LBS, 36% EFFY. | Moving Pull: 16 LBS, 42% EFFY. - AMBER 'A': Initial Pull: 14 LBS, 49% EFFY. | Moving Pull: 10 1/2 LBS, 66% EFFY. - P 4 OIL: Initial Pull: 15 LBS, 46% EFFY. | Moving Pull: 10 1/2 LBS, 66% EFFY. Row: AVERAGE EFFY - CASTROL R: Initial: 43% | Moving: 60% - WHITMORES COMPOUND: Initial: 38% | Moving: 45% - AMBER 'A': Initial: 48% | Moving: 65% - P 4 OIL: Initial: 46% | Moving: 64% | ||