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).
Engine examination report for a B.56.BN Bentley, detailing issues with pistons, connecting rod bearings, and a failed petrol pipe.
| Identifier | ExFiles\Box 83\4\ scan0024 | |
| Date | 30th October 1935 | |
| X20QA HOTEL DE FRANCE. CHATEAUROUX. Indre. France. GWH{George W. Hancock - Head Chateauroux}/5/JAB. 30th October 1935. To. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} From. G.W.H. B. 56. BN.{W.O. Bentley / Mr Barrington} - BENTLEY. We have dismantled the Engine and examined the the Pistons and connecting rod bearings. The Aerolite Pistons do not show any signs of cracks. The rings were free in the grooves. The bedding shows full on the pressure and non pressure side, slightly on the hard side at the top of the skirt. The lands are clear. GUDGEONS PINS. These were all free and show signs of having correctly floated. CONNECTING ROD BEARINGS. Hall White Metal N° 2 & 3 rods show failure of the bearings. On N° 3 the metal is cracking up in the top half, several small pieces having detached themselves after dismantling. The bottom half is sound but shows markings of fine pieces of metal having been pressed in. On N° 2 the top half is in a good condition, but the bottom half, a piece approximately the size of a threepenny bit has come out since dismantling. The remaining connecting rod bearings are in a good condition. The mileage up to date is 9.181. We will forward photos of these in due course. ---------------- We have despatched to-day the Powerflex Petrol pipe which failed. It was necessary to solder up the pipe to continue running as you will observe. ---------------- We are examining the valves seats etc., ---------------- We received your telegram enquiring whether the Crankshaft was damaged, to which we replied in the negative. ---------------- G.W.H. GWHancock | ||