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).
Investigation into the engine balance of a 16-cylinder engine using articulated connecting rods.
| Identifier | WestWitteringFiles\O\January1926-March1926\ Scan22 | |
| Date | 23th January 1926 | |
| TO EFC. FROM E.{Mr Elliott - Chief Engineer} Copy to Mr. Royce ORIGINAL re. ENGINE BALANCE. X1482 It is desired to know to what extent the use of articulated rods would affect the balance of a 16 cyl. engine which is of the same type as Eagle 16, except that the pistons on any one crankpin are all in the same plane. Mr. Royce would like you to investigate this, taking as a basis the proportions which have been settled for Eagle 20. connecting rods, and which are as follows:- Length of master rod between centres 9.850". Length of articulated rod between centres 7.600". Stroke of piston 5.500". [Handwritten Calculations] l = 9.850" ✓ r = 2.750" ✓ E.{Mr Elliott - Chief Engineer} l' = 7.600" ✓ a = 2.250" ✓ k = r/l = .27918, p = a/l' = .29605+ q = r/l' = .36184 | ||