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).
Table of vibration test data for Vulture engines, measuring vertical, transverse, and longitudinal vibration under various operating conditions.
| Identifier | ExFiles\Box 142\1\ scan0280 | |
| Date | 21th October 1938 | |
| VIBRATION OF VULTURE ENGINES. (IGNITION SYSTEM) VM. I. TABLE STRUCTURE: COLUMN 1: ENGINE CONDITIONS. COLUMN 2: VERTICAL VIBRATION. (Sub-columns: RANGE IN INCHES, ORDER (CRANK), REMARKS) COLUMN 3: TRANSVERSE VIBRATION. (Sub-columns: RANGE IN INCHES, ORDER (CRANK), REMARKS) COLUMN 4: LONGITUDINAL VIBRATION. (Sub-columns: RANGE IN INCHES, ORDER (CRANK), REMARKS) TABLE DATA: Row 1: - ENGINE CONDITIONS: 2200 R.P.M M.S. - VERTICAL VIBRATION: Range: 0 TO .002, Order: 6, Remarks: MODULATED (AT 1ST ORDER FREQ.) - TRANSVERSE VIBRATION: Range: 0 TO 0.007 / 0.004, Order: 6 / I, Remarks: MODULATED - LONGITUDINAL VIBRATION: Range: 0 TO 0.002, Order: 6, Remarks: MODULATED Row 2: - ENGINE CONDITIONS: VULTURE II 2, 2400 R.P.M. M.S. - VERTICAL VIBRATION: Range: 0 TO .005 / .006, Order: 6 / I, Remarks: MODULATED - TRANSVERSE VIBRATION: Range: .003 TO .008 / .007, Order: 6 / I, Remarks: MODULATED - LONGITUDINAL VIBRATION: Range: 0 TO .002, Order: 6, Remarks: MODULATED Row 3: - ENGINE CONDITIONS: POWER CURVE RUN AT 5 LBS BOOST., 2400 R.P.M. F.S. - VERTICAL VIBRATION: Range: 0 TO .005 / .007, Order: 6 / I, Remarks: MODULATED - TRANSVERSE VIBRATION: Range: .002 TO .008 / .006, Order: 6 / I, Remarks: MODULATED - LONGITUDINAL VIBRATION: Range: .002 TO .005, Order: 6, Remarks: MODULATED Row 4: - ENGINE CONDITIONS: 2600 R.P.M. M.S. - VERTICAL VIBRATION: Range: .003 TO .005, Order: 6, Remarks: MODULATED. - TRANSVERSE VIBRATION: Range: .005 TO .008, Order: 6, Remarks: MODULATED IRREGULAR. - LONGITUDINAL VIBRATION: Range: .002 TO .005, Order: 6, Remarks: MODULATED Row 5: - ENGINE CONDITIONS: PORT UPPER DISTRIBUTOR, 2850 R.P.M. M.S. - VERTICAL VIBRATION: Range: .003 TO .006, Order: 6, Remarks: MODULATED. - TRANSVERSE VIBRATION: Range: .010, Order: 6, Remarks: NO REGULAR MODULATION - LONGITUDINAL VIBRATION: Range: .002 TO .005, Order: 6, Remarks: MODULATED Row 6: - ENGINE CONDITIONS: VULTURE II 4. RUNNING AT 3000 R.PM 6 LBS BOOST. PORT UPPER DISTRIBUTOR - VERTICAL VIBRATION: Range: 0 TO .008, Order: 6, Remarks: MODULATED AT 1ST ORDER FREQ. - TRANSVERSE VIBRATION: Range: .011 / .012, Order: 6 AIR-SCREW, Remarks: (POSSIBLY DUE TO SCREW MALALIGNMENT) - LONGITUDINAL VIBRATION: Range: .012, Order: 6, Remarks: - Row 7: - ENGINE CONDITIONS: PORT LOWER - VERTICAL VIBRATION: Range: 0 TO .006, Order: 6, Remarks: VERY IRREGULAR - TRANSVERSE VIBRATION: Range: .006 / .010, Order: 6 AIR-SCREW, Remarks: - - LONGITUDINAL VIBRATION: Range: -, Order: -, Remarks: READINGS COULD NOT BE TAKEN. Row 8: - ENGINE CONDITIONS: STBD. UPPER - VERTICAL VIBRATION: Range: .004 TO .008, Order: 6, Remarks: MODULATED AT 1ST ORDER FREQ. - TRANSVERSE VIBRATION: Range: .010 / .010, Order: 6 AIR-SCREW, Remarks: - - LONGITUDINAL VIBRATION: Range: .008, Order: 6, Remarks: - Row 9: - ENGINE CONDITIONS: STBD. LOWER - VERTICAL VIBRATION: Range: .002 TO .006, Order: 6, Remarks: IRREGULAR. - TRANSVERSE VIBRATION: Range: .006 / .008, Order: 6 AIR-SCREW, Remarks: - - LONGITUDINAL VIBRATION: Range: -, Order: -, Remarks: - Row 10: - ENGINE CONDITIONS: VULTURE II 4., 3000 R.P.M. 6.6 LBS BOOST - VERTICAL VIBRATION: Range: .002 TO .003 / .012, Order: 6 / I, Remarks: - - TRANSVERSE VIBRATION: Range: .008 / .008, Order: 6 AIR-SCREW, Remarks: - - LONGITUDINAL VIBRATION: Range: .004 / .003, Order: 6 AIR-SCREW, Remarks: - Row 11: - ENGINE CONDITIONS: 2800 R.P.M. 5.5 LBS BOOST - VERTICAL VIBRATION: Range: .002 TO .003 / .003, Order: 6 / 9, Remarks: IRREGULAR. - TRANSVERSE VIBRATION: Range: .005 / .005, Order: 6 AIR-SCREW, Remarks: - - LONGITUDINAL VIBRATION: Range: .003 / .003, Order: 6 AIR-SCREW, Remarks: - Row 12: - ENGINE CONDITIONS: 2600 R.P.M. 4.3 LBS BOOST - VERTICAL VIBRATION: Range: .001 TO .003 / 0 TO .003, Order: 6 / I, Remarks: IRREGULAR - TRANSVERSE VIBRATION: Range: .006 / 0 TO .004, Order: 6 / I, Remarks: IRREGULAR - LONGITUDINAL VIBRATION: Range: .002 TO .005, Order: 6, Remarks: - Row 13: - ENGINE CONDITIONS: 2400 R.P.M. 3.2 LBS BOOST - VERTICAL VIBRATION: Range: .001 / .004 TO .007, Order: 6 / I, Remarks: - - TRANSVERSE VIBRATION: Range: .002 TO .004, Order: 6 & I, Remarks: IRREGULAR - LONGITUDINAL VIBRATION: Range: .001 TO .004, Order: 6, Remarks: - Row 14: - ENGINE CONDITIONS: 2200 R.P.M. 2.3 LBS BOOST - VERTICAL VIBRATION: Range: 0 TO .009, Order: 6, Remarks: MODULATED AT ABOUT ¼ ORDER - TRANSVERSE VIBRATION: Range: 0 TO .003, Order: 6 & I, Remarks: IRREGULAR - LONGITUDINAL VIBRATION: Range: 0 TO .002, Order: 6 & I, Remarks: IRREGULAR SGL. 21/10/38 . | ||