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).
Visit to the Buick Foundry to investigate cylinder porosity and compare cylinder block construction.
| Identifier | ExFiles\Box 174\2\ img058 | |
| Date | 27th March 1937 | |
| To Hs.{Lord Ernest Hives - Chair} and Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c.c.RHG, Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}, HPS{Horace Percy Smith - Experimental Factory Mgr}, Dar, B, H.H. Mr Walker (Pattern Shop) Mr Edwards (Foundry) for JMR DETROIT. Buick Foundry - Cylinder Porosity. After receiving Hs{Lord Ernest Hives - Chair}' cable re cylinder porosity etc. Rm{William Robotham - Chief Engineer} and E.{Mr Elliott - Chief Engineer} arranged to drop Royce at Flint to see the Buick Foundry on their way to Saginaw, but as the weather was too bad to proceed beyond Flint, all went to Buick. The following report is an enlargement on the cablesent in reply to Hs.{Lord Ernest Hives - Chair} The R.R. cylinder block should be an easy job compared with the Buick '8' in-line combined cylinder and crankcase, which latter has a parallel piece of core sand 5/32" thick at top, 3/16" at bottom, by about 1-1/8" wide between nearest cylinder barrels, as in sketch. The cylinder barrel thickness-es are 7/32" at top and 9/32" at bottom. The jacket core is 4 5/8" deep overall but is split horizontally at a point 1-1/2" from the top, the lower side of the upper core portion being formed to leave 1/2" x 5/16" ties between the barrels. The addition of these ties cured cylinder bore distortion arising from head bolting strains. The finished bores are held to an ovality not exceeding 1/2 thou. normally and 3/4 thou. occasionally. We watched Buick '8' Cyl. block cores being produced, which is done with metal moulds on Tabor moulding machines. The cores are well wired, the wires being supplied already prepared in correct length, shape and | ||