Stress analysis and comparison data for Kestrel and Bensport engine studs.
| Identifier | ExFiles\Box 86\1\ scan0008 | |
| Date | 22th September 1932 | |
| - 2 - Engine. Pressure area. sq.ins. Area of stud section. sq. ins. No.of studs per cyl. Ratio-pressure area to stud area. Ref Kestrel(Aero Engine). 20.629. .185(Bottom of thread) 4 27.9. B. " 20.629. .2485 -do- 4 20.9. C. Bensport(Codename for 3 1/2-litre Bentley). 6.28. .0315.(.250 stud) 6 33.3 " 6.28. .0408.(.2812 stud) 6 25.7. " 6.28. .051.(.3125 stud) 6 20.6. Stress with 500 lbs per sq.in. pressure. Engine. Stress. lbs per sq.in. Reference. Kestrel(Aero Engine). 18,000 A. {Mr Adams} " 13,900 B. " 10,400 C. Bensport(Codename for 3 1/2-litre Bentley). 16,600 .250 stud. " 12,800 .2812 stud. " 10,450. .3125 stud. Diagram text: .562"-16 TPI .425" DIA .625"-20 TPI AWAITING APPROVAL A B C We are making an investigation into metal joints with a view to reducing the area in contact to the useful minimum. Those we have tested hitherto have been provided with corrugation around the aperatures where a good seal is required. A drawing will follow showing section of stud bosses between cylinders. E. {Mr Elliott - Chief Engineer} | ||
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).