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 results for two types of Bavox tyre pumps, the B.V.4 and B.V.5.
| Identifier | ExFiles\Box 149\5\ scan0087 | |
| Date | 27th April 1926 | |
| To Hs{Lord Ernest Hives - Chair} from RHC.{R. H. Coverley - Production Engineer} X993 RHC{R. H. Coverley - Production Engineer}1/BE. 27.4.26. RE BAVOX TYRE PUMPS We have tested the B.V.4 and 5 types of tyre pumps and give below figures of test which comes up to the Maker's specification. B.V.4. B.V.5. Pressure.......... 90 lbs □ '' 130 lbs □ '' Free Air Delivery... 3.39 cu.ft/min. 5.65 cu.ft/min. Speed............. 1250 r.p.m. 1000 r.p.m. Power Absorbed...... 1.7 h.p. 2.3 h.p. RHC.{R. H. Coverley - Production Engineer} | ||