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).
Four modifications for E.R. Hall's B-21 engine, based on findings from a dismantled B-3 unit.
| Identifier | ExFiles\Box 90a\4\ Scan108 | |
| Date | 20th April 1936 | |
| x262. To R.H.C. HS{Lord Ernest Hives - Chair}/Svd1.1/JR.{Mr James Royce} 20.4.36. B-21 E.R.Hall's. Engine. From results obtained on B-3 unit which is now dismantled, will you please carry out the following on B-21 unit. (1) Chamfer at the base of the cylinder barrels to be raduised off with a smooth polished finish to the sketch hm.{Capt. W. Hallam - Head Repairs}111. (2) Intermediate main bearings to have the continuous grooves as per the other main bearings. This also to apply to the rebuild of B-3. (3) Locking device on the water pump gland nut as per B-11 unit now in Hall's car. Water drain cock on pump to have positional locking as B-11. (4) Sump oil filler with ejector breather pipe as std. Bentley but with boss cast on for filling from the extra oil tank as B-11. HS{Lord Ernest Hives - Chair}/L.H.Swindell. | ||