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).
New 20 HP induction system designed to improve strength and reduce weight.
| Identifier | WestWitteringFiles\Q\December1926-January1927\ 120 | |
| Date | 27th January 1927 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/AJL. c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to HU. E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} 20 HP. INDUCTION SYSTEM (Lec.2216) (X5070) M The primary object of the above induction pipe system is to provide a stronger connection to the cylinder block, in order to overcome the very numerous breakages at this point on the present standard system. The pipe has other advantages which have been appreciated during the short time it has been in service. (1) Reduction in weight. (2) Greater accessibility of the holding-down studs, both on the cyl. block and on the head. (3) Simplified hot spot joint (easier to manufacture) (4) Reduction in the number of parts, due to the simplification of the hot spot. This type of induction system has been running on chassis No. 11-G-111 for 2803 miles with success. No dis-advantage is noticeable due to the reduced heat to the pipe caused by the smaller hot spot area and smaller heat conducting power of the alum. as compared with the standard cast iron pipe. Weight of std. C.I. induction and exhaust manifold - 17 lbs. 4 ozs. " " system to Lec.2216 (alum. induction pipe) - 10 lbs. 14 ozs. Decrease in weight = 6 lbs. 6 ozs. Below are given results of comparative tests on the test bed, between the standard system and the aluminium pipe :- contd :- | ||