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).
Test report comparing the performance of different induction pipe, fishtail, and hot spot pipe configurations.
| Identifier | ExFiles\Box 66a\2\ scan0181 | |
| Date | 20th February 1928 guessed | |
| contd :- -2- TEST A.{Mr Adams} Induction pipe, fishtail and hot spot pipe to Sch.965. Power : More power is obtained when pipe containing nozzle is used, than with the other; but both pipes give more power than a standard induction pipe up to 2300 r.p.m., after which power falls slightly below standard (see Sheet 1.) Distribution : Very good, especially at low speeds. Nozzle in fishtail improves distribution, but both arrangements are slightly better than standard. TEST B. Induction pipe and fishtail to Sch.965 : Hot spot pipe to V.245 (this hot spot pipe gives standard position for carb.) Power : Power curves are almost identical with those of Test. A up to 2000 r.p.m., when this arrangement shews a slight increase. Pipe without nozzle gives more power than standard at all speeds. (see sheet 11.) Distribution: Similar to Test A.{Mr Adams} TEST C. Induction pipe, fishtail and hot spot to Sch.980 Power : Very little improvement to standard is obtained when nozzle is fitted in fishtail, and with no nozzle the power falls far short of standard above 1000 r.p.m. (see sheet 111.) Distribution : Fair with nozzle - poor without. contd :- | ||