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 with calculations analyzing high-speed wheel wobble and gyroscopic moments.
| Identifier | ExFiles\Box 29\1\ Scan306 | |
| Date | 5th May 1927 | |
| DRAWING NO.: II SEE ALSO THE FOLLOWING OPERATION DRAWINGS 5 FT. 11 FT 10'(EST) 10'(EST) 72 M.P.H BRUISE ON ROAD SHOWING SIDE WALL OF TIRE SCRUBBING ROAD (THIS IS WHAT TWISTS THE WHEEL - SEE SK I) VEL. OF CAR = 105 FT/SEC CRISS-CROSS FREQUENCY = 9.55 VIBRATIONS/SEC = 575 VIBS/MIN (THIS AGREES WITH OBSERVED "TRAMPING" FREQUENCY) ω - ROTATION OF WHEEL = 12 REVS/SEC = 76 RADS/SEC Ω - PRECESSION OF WHEEL = 20° IN .0476 SECS = 420°/SEC = 7.3 RADS/SEC I - M.I. OF WHEEL (NEGLECTING BR.{T. E. Bellringer - Repair Manager} DRUMS) = 2.79 UNITS GYROSTATIC MOMENT ON FRONT AXLE = E I Ω ω = 3100 LBS FEET. = 655 LBS ON EACH WHEEL 655 LBS 655 LBS TITLE: HIGH SPEED WOBBLE ROLLS-ROYCE OF AMERICA, INC. Date: MAY 5/27 Approved by: CG | ||