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).
The particulars of the dashpot for the Bentley III brakes.
| Identifier | ExFiles\Box 98\3\ scan0028 | |
| Date | 13th May 1938 | |
| 466 To Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}1/JH.13.5.38. BENTLEY III BRAKES. With reference to the dash pot referred to in Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}6/R.11.5.38. the particulars of this dash pot are as follows - Dia. of Piston 1.750". Dia. of leak holes (one .125" dia. (one .187" dia. The piston moved at 1.5 times servo balance arm speed. The leak was such that the piston moved 2.187" in 3.5 secs. under a load of 1 1/2 lbs. This is equivalent to a leak of 1.445" in 3.5 secs. under a load of 2.25 lbs. when the piston moves at servo output brake rod speed. The oil was bijur feed oil. It is necessary for the whole of the dashpot fixings and linkage to be strong enough to carry the servo load, as momently it appears to carry this load. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||