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).
Condition and performance of brake drums, axles, and suspension components after mileage testing.
| Identifier | ExFiles\Box 182\M18\ img059 | |
| Date | 12th April 1941 | |
| -7- of 6,300 were in a fine condition. The braking surfaces were without any signs of ridges. It was a smooth glossy surface with no sign of surface cracks. The inner cooling fin of the N.S. had a piece 2.5" long broken off, evidently, by a stone being flung against same. It has in no way affected the drum. The O.S. brake drum and shoes were found saturated with oil, due to the bad leak from the axle at this side. The oil had been drawn in from the guard. It had not overflowed from the inside. The brake shoes were in an excellent condition. The auxiliary shoes showed no deterioration and were operating satisfactorily. The stronger springs G.30050 fitted are a decided improvement. There was no indication of the brake linings having been dragged along the shoe. FRONT AXLE & BRAKES to NCP.G.78638. H.S.3176. G.78505 Brake Drums - T.H. Casting similar to Lake & Elliott's specification. D.7120 Bolts - replacing studs for fixing the Plates. The front drums taken off and examined at a mileage of 6,300 were in the opposite condition to those of the rear. The N.S. had a deep groove in the centre, and the metal had embedded itself in the shoes. The O.S. was in a worse condition. There were a series of deep grooves, and more metal was embedded in the shoes. The braking had been efficient and quiet. The auxiliary shoes were operating satisfactorily. REAR AXLE to LCP.G.78624 - 12 4 41 R.MIO. Oil retaining baffle fitted to O.S. Axle Tube to G.L.397. G.78508 Oil Retainer. G.78510 Oil Retaining Tube. The rear axle is a good standard for quietness, and has remained so during the mileage. The fitting of the oil baffle has unfortunately had the opposite effect, the loss of oil from the O.S. has been abnormal during each day's run. It has averaged out 1 pint for every 300 miles. We are puzzled at this result as previously it has been effective. We intend to have it dismantled at the Paris Depot, as we have not the required tackle or tools here for this kind of work. SHACKLING & SPRINGING. Spring Controlled Rear Shackle on Front R.H. Spring to NS.{Norman Scott}3132. F.84418 Bracket, & - F.84423 Springs. | ||