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).
Potential use and applications of Simmonds Elastic Stop Nuts.
Identifier | ExFiles\Box 95\2\ scan0240 | |
Date | 11th January 1938 | |
To By... from Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions} c. to De. c. to Rm.{William Robotham - Chief Engineer} c. to Ev.{Ivan Evernden - coachwork} [Handwritten in red] Les your opinion? Rm{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions}14/N.11.1.38. Simmonds Elastic Stop Nut. [Handwritten] 348 As a result of a talk to a representative of Simmonds Aerocessories Ltd. on their stand at the Motor Show, mentioned in my report on that, Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions}3/N.25.10.37, I have since had a visit from a representative at these Works, and also a letter. The nuts are satisfactory for temperatures up to 250°F, and applications mentioned were on O.H.V. rocker gear and cylinder heads, securing the cylinder block to the crankcase, engine rubber mountings, and road spring bolts. A possible application worth bearing in mind for B.50 is wheel securing nuts since it is then possible to do away with R H and L.H. threads on the studs, with bolt-on type wheels. I understand that they should show an overall saving as compared with a castle nut, so that in our case it might be worth trying for the main road spring bolts, where in all cases now castle nuts are used. Daimler's use them in this position. One position where I think they should be tried is the upper yoke piece bearing of Phantom III, and Wraith front suspensions. The Phantom III one is shown in G.83747 sheet 1, section GG. in which the nut and split pin, respectively G.3178 and K.4608, would be replaced by a Simmonds nut and the bolt G.83634 would not require drilling for a split pin. The Wraith application is similar. These people are prepared to supply samples, sufficient for our experimental work probably, and I gathered are keen to have us use their nuts on our cars. Where we have a specific application we can get a quotation for the nuts from them, and can thus get some idea of relative cost, bearing in mind that there will also be differences in assembly costs. A descriptive booklet is attached to BY's copy. Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions} | ||