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).
Graph chart documenting an electrical test with performance data and calculations.
| Identifier | ExFiles\Box 54\1\ Scan174 | |
| Date | 1st November 1928 | |
| 1-11-28 182 P&R RRII-3 75 c.h. 97 LBS Average amperes = 6.35 Hours = 14.0 Ampere hours = 88.9 .917 1.80w | ||