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).
Balancing Peregrine propeller shafts and the associated challenges compared to the 20/25 model.
| Identifier | ExFiles\Box 2\1\ B002_136 137-page21 | |
| Date | 6th January 1933 | |
| BY.{R.W. Bailey - Chief Engineer} SPT. 8137 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}8/KT.6.1.33. BALANCING OF PROPELLER SHAFTS. We are sending you a diagram of how we recommend correcting unbalance on the Peregrine propeller shafts. It is not possible to do so in an exactly similar way on the 20/25, as a flange that can be drilled to a depth of .500 will foul the bronze selector housing casting, and also, unless given a set, will foul the row of bolts supporting the engine. Will BY.{R.W. Bailey - Chief Engineer} please look into how best to fit in a flange for drilling to correct unbalance. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||