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).
Damper testing and modifications, and a repair for a water pump gland leak.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page148 | |
| Date | 14th December 1932 | |
| X4057. N.S. 3469 To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} From G.W.H. BY/HFDA/11 4 32 Hotel de France, Chateauroux, FRANCE. (By/HFDS) N.9. 4.32 14.12.32. 2.PAR.II. we have had to hold the car up as per our report of the 13/12/32. We have made a new bracket, and tested the dampers for load. This came out to 85 lbs. with a steady pull. When the arm is lifted rapidly, not as quickly as would be the case on the road, the load increases to 130 lbs. we must be getting well over 200 lbs. on a quick maximum bump. this load, due to the fulcrum of the anchorage, is downward at the rear of the damper. The failure may be this load, or it is the hammering effect it has had during the failures of the aluminium bracket, also the sharp knock when the lever fouled the bolt of the anchorage. We can see that the buffer has been hitting the axle hard. During our investigation of the damper movement, we have found that when the bolt is removed, that fouls the lever, there is only a further movement upwards of the lever of 1/4" before it is at the end of its stroke. the stroke of the damper will therefore not allow for any more buffer clearance, and this will have to be kept down to 4 inches to be on the safe side, without you make the necessary modifications. We have, on the O.S. brought the clearance to just under 4 inches, as this side of the car is evidently getting some very hard knocks, due to the conditions of the roads. it is the N.S. over here. RE. water leak from gland of water pump connection to cylinder block. The leak of water got worse from this gland so we have dismantled same. it will be seen by the sketch enclosed that the aluminium gland washer is too soft. the heads of the set screws had chewed there way in, bulging out the metal. This prevents the gland from following up. the rubber ring had grown large on the inside diameter, allowing the water to creep through. We have made a metal ring to go over the flange of the gland for the heads of the set screws to butt up against. this will prevent them eating into the soft metal. the same rubber has been used as we can now squeeze the gland up further. G.W.H. E100189 RR S127 | ||