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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 report on a Phantom II low inertia slipper wheel, detailing findings and recommendations from road tests and a stripped-down examination.

Identifier  ExFiles\Box 137\4\  scan0073
Date  3rd January 1930
  
To Hy.{Tom Haldenby - Plant Engineer} From Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}
c. to Elt.
c. to WOF.

x 634
Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}1/WJ.3.1.30.

1634
x7020
x4499

PHANTOM II LOW INERTIA SLIPPER WHEEL.

We have tested and examined one of the first works produced low inertia crankshaft dampers.

The test on the road did not show up any faults.

The engine was free from "bus knocks" and crankshaft periods and there was no sign of engine gear rattles stationary.

Examination of the unit when stripped shows that the spring plate has been left with scale from the hardening process, this should be sand-blasted until such times as the new pressed plates come into production.

The front bearing shewed one or two hard marks. It is important that the two bronze bearings be in line or the front bearing is liable to seize. The oil retaining flange on the fan pulley was not concentric with the gear case and shewed signs of fouling. There should be a jig for the alignment as used by the Experimental Dept.

The spring driving load gave a poundage of 21 lbs. on one set of springs and 25 lbs. on the other set. This should be more even. The Works should be notified. The slipping load was at the maximum 25 lbs.

The general work of the slipper wheel was good.

It was noted that no markings were etched or stamped on the various parts for refitting after dismantling. This should be done in order to keep the timing gears in their correct teeth.

Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}
  
  


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