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).
Dynamometer test report on a Lancia Lambda, detailing power output at the road wheels and comparing it to a 20 HP model.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan230 | |
| Date | 22th June 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL. c. to BJ. RG.{Mr Rowledge} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} ORIGINAL Hs{Lord Ernest Hives - Chair}/ACL1/LG22. 6. 26. X4048 LANCIA LAMBDA. POWER OUTPUT AT ROAD WHEELS. We have taken a dynamometer test of the Lancia Lambda and the attached curve shews the power given at the road wheels. The complete curve was taken with the cutout open and only three readings were obtained in the closed position before the cutout failed. The engine has a bore of 3" and stroke of 4.8". The compression ratio is 5.125. Full spark advance could be given without noticeable detonation at the lowest speed - 500 r.p.m. - but detonations were audible when accelerating under load at low speeds. Ordinary Shell Mex petrol was used. Consumptions were taken at 1500 and 2000 r.p.m. and shew fairly good economy of .72 and .75 pts/HP/Hr. at the road wheels. (The corresponding figure for a Goshawk being .8 pts/HP/Hr.) At present we have no figures of consumption taken on the road. In order to obtain a comparison with a known standard we supplied further curves, shewn on Sheet 2., making comparisons with the 20 HP. R-R.{Sir Henry Royce} The road wheel M.E.P. curves are given. The noticeable difference between those for the two engines being that the Lancia, although not reaching quite such a high maximum value, maintains its M.E.P. over a greater speed range than the 20 HP. contd :- | ||