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).
Modifying the air release hole in front shock damper filler tubes to prevent overfilling.
| Identifier | ExFiles\Box 16\4\ Scan245 | |
| Date | 14th January 1931 | |
| X7520 FOR FILES. FRONT SHOCK DAMPERS. S.S.A.C.D. AIR RELEASE IN FILLER TUBE. We found that with a .025" dia. hole drilled in the side, near the top of the filler tube (or stand pipe) the damper did not over fill. When drilled .032" dia. there is a tendency to slightly over fill; from three tests we found that the oil level was approx. .200" above standard. With a .055" dia. release, damper fills right up quite easily. Thus it will be advisable to exceed .025" dia. for this modification. The operation of filling during these tests was accomplished by syringe, the oil being fed in slowly. W. Bell. [Diagram text] Air Release Hole .025" dia STD OIL LEVEL | ||