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).
Page 2 of a memo comparing the cost and design of a unit against a Packard Air Silencer.
| Identifier | ExFiles\Box 86\3\ scan0161 | |
| Date | 20th March 1936 | |
| -2- support our opinion that the R.R. unit is soundly designed and constructed. The fact that one or more Tubes and Baffles are used in the Packard Silencer than in our own design does not convince us that it is necessarily more expensive, in fact, we have carefully estimated the cost of producing the Packard Air Silencer, and in our opinion, covering material and labour, we could make this and fit to our engine at considerably less cost than is the case with our present design. Sft.{Mr Swift} | ||