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).
Balance of a twin 5-cylinder engine, with comparisons to 10 and 6-cylinder engines.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 157 | |
| Date | 24th March 1928 | |
| HS{Lord Ernest Hives - Chair}/TSN. FROM E.{Mr Elliott - Chief Engineer} ORIGINAL. E3/M24.3.28 X1482 Thank you for your report on the balance of the twin 5. engine. I notice you have already sent a copy to OY., so it is not therefore necessary for me to enclose a further copy with my remarks on the aspect of Mr. Nickerson's proposal in other directions. I notice that you remark in the para. on torsional balance, page 3., that the 10 cyl. engine is comparable with the 6 cyl. in respect to inertia torque. I may not fully understand this, but it appears to me that torsional ripple is of the 5th. order in the case of the 10 cyl., and of the 3rd. order in the case of a 6 cyl., and that their respective magnitudes are in the ratio of about 1 to 200., not correcting for the difference in cylinder sizes, hence it appears to me that the 10 cyl. engine should be very good in respect to this point. E.{Mr Elliott - Chief Engineer} | ||