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).
Use of malleable iron for exhaust manifolds on the 25/30 HP chassis.
| Identifier | ExFiles\Box 104\2\ scan0235 | |
| Date | 26th August 1936 | |
| X523 BY.17/G.26.8.36. BY/cc Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 25/30 HP. CHASSIS. RE: TROUBLE WITH EXHAUST MANIFOLDS REPORTED IN GWH.{George W. Hancock - Head Chateauroux}2/JAB.16.8.36. We have used malleable iron in the early days for Phantom 1., particularly from the Repair Department point of view, and they inform me that where they fitted malleable iron pipes they have had practically no recurrence of the trouble. This confirms GWH{George W. Hancock - Head Chateauroux}'s views in regard to the 20 HP. chassis. In view of the fact that apparently malleable iron has given better results on exhaust manifolds previously, we are in agreement that we should order 3 or 4 sets for the Experimental Department, so that they can check up the results as quickly as possible. It will be necessary for us to make new patterns, but before starting these I will write to Leys Malleable Castings Co. sending blueprints of our existing pipes, and enquire if it is possible for them to cast the pipes in their present thicknesses, also to give us the contraction allowance, as the amount required is approximately twice that for cast iron. It will certainly mean a set of patterns and core boxes, and we would like to have the Experimental Department's concurrence that we should put the new patterns and core boxes in hand. BY.{R.W. Bailey - Chief Engineer} | ||