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).
Blueprint for a motor vibration damper assembly, including a performance graph.
| Identifier | ExFiles\Box 127\1\ scan0310 | |
| Date | 18th January 1939 | |
| TOP LEFT GRAPH: DISTANCE MOVED AT 10 IN. RADIUS INCHES FROM CENTRAL POSITION TORQUE IN LBS INCHES MOTOR VIBRATION DAMPER ASSEMBLY WHEN TESTED ON FIXTURE MUST GIVE LOOP FALLING ENTIRELY WITHIN THIS AREA MAIN DRAWING ANNOTATIONS: 5504-U 83770-C 195903-E 195905-C 195916-C ASSEMBLY 190472-E 197698-D 197697-D 202878-B 219957-C ASS'Y 219946-B KEYWAY SHOWN OUT OF TRUE POSITION 83763-D 83764-C 85416-D 197766-B ASSEMBLY 221086-C 197782-E 197747-C 185761-E 197748-C ASSY. BALANCE STATICALLY WITHIN .02 OZ. INCHES BALANCE BY DRILLING AS SHOWN DRILL 3/8 TO BALANCE 5/16 MAX. DEPTH. TO POINT OF DRILL LEVEL OF OIL BOTTOM LEFT NOTES: ALL HOLES AND SHARP CORNERS TO BE BURRED .005 TO .015 UNLESS OTHERWISE SPECIFIED. ALLOWABLE VARIATION ON DIMENSIONS LOCATING FINISHING SURFACES IS PLUS OR MINUS .010 UNLESS OTHERWISE SPECIFIED. ALLOWABLE VARIATION ON CASTING DIMENSIONS IS PLUS OR MINUS 1/32 AND ON FORGING DIMENSIONS PLUS 1/16 MINUS .00 UNLESS OTHERWISE SPECIFIED. REMOVE SCALE FROM FORGINGS. REMOVE SAND AND FINS FROM CASTINGS. FORGING DRAFT ANGLE 7° UNLESS OTHERWISE SPECIFIED. DOT AND DASH LINES INDICATE ROUGH STOCK. 1000-8-1-39 DETROIT BLUE PRINT & SUPPLY CO. TOP RIGHT ALTERATIONS TABLE: ALT. NO. | LET. | ALTERATION | DATE | CKR. A | R.C.# 221086-C WAS 209072-C | 1-30-39 | Stacy BOTTOM RIGHT TITLE BLOCK: NAME: C.T., Heath, Kellogg, Seas on DATE: 1-18-39, 1-25-39, 1-27-39 BY: DTR., TCR., CKR., MET., CF.DN., ENG. Packard MOTOR CAR COMPANY DETROIT, MICHIGAN MATERIAL: SIZE: SHAPE: FORM: MOTOR VIBRATION DAMPER ASSEMBLY NAME: A7B PIECE NO.: 219921 | ||