Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Performance test figures comparing acceleration times for Wraith cars 24.G.VI. and 25.G.VI.

Identifier  ExFiles\Box 6\6\  06-page221
Date  17th June 1937
  
Wraith File.

600

Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} 17.6.37.


WRAITH CARS 24.G.VI. & 25.G.VI.

Camshafts 24.G.VI. E.59919. 25.G.VI. Ex.24268.

Performance test figures obtained from the above cars, both weighted to 1 ton 19 cwts. 2 qrs. 21 lbs.

At 30 M.P.H. 24.G.VI speedometer reads 7% fast and 25.G.VI speedometer 6% fast.

Figures are the average of 3 runs each in outward and inward directions on Shardlow Road.

| M.P.H. | OUT | IN | AVERAGE |
|---|---|---|---|
| | 24.G.VI. | 25.G.VI. | 24.G.VI. | 25.G.VI. | 24.G.VI. | 25.G.VI. |
| 10-20 | 4.0 secs | 3.8 secs | 4.4 secs | 4.0 secs | 4.2 secs | 3.9 secs |
| 20-30 | 3.8 " | 3.9 " | 4.2 " | 4.0 " | 4.0 " | 3.95 " |
| 30-40 | 4.0 " | 4.1 " | 4.6 " | 4.2 " | 4.3 " | 4.15 " |
| 40-50 | 4.6 " | 4.8 " | 5.2 " | 5.0 " | 4.9 " | 4.9 " |
| 50-60 | 6.6 " | 6.0 " | 7.0 " | 6.3 " | 6.8 " | 6.15 " |
| 60-70 | 9.0 " | 9.4 " | 10.2 " | 10.3 " | 9.6 " | 9.85 " |
| 10-70 | 32.0 " | 32.0 " | 35.6 " | 33.8 " | 33.8 " | 32.90 " |


| TICKNALL HILL | 24.G.VI. | 25.G.VI. |
|---|---|---|
| | 56.8 secs. | 56.2 secs. |


Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙