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).
Parts list for the Resonant Type Silencer on a 20/25 HP Chassis.
| Identifier | ExFiles\Box 104\2\ scan0047 | |
| Date | 8th July 1932 | |
| RECEIVED To BHO. c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X5230. BY/CS9/EH.8.7.32. Re 20/25 HP. Chassis - Exhaust Fittings - Section 5230. The Resonant Type Silencer. Further to our memo' BY/CS3/EH.7.7.32., the following are standard and existing parts required for the above experiment. F.7241 Rivet - Silencer Baffle to Inner Pipe 8 off. F.7241 " - Heat Shield Brackets 12 " F.7241 " - Silencer Support 24 " E.18343 " - Silencer Baffle 16 " F.55830 Packing - Nozzle Support 1 " E.71103 Rivet - Cowl Heat Shield 9 " E.50175 Washer - Downtake Flange 3 " E.53965 Joint Washer (Inlet to Exhaust) 1 " E.55230 Stiffening Tube (Nozzle) 1 " E.55928 Bracket (Inter Pipe) 1 " E.4176 Swan Neck Lagging Clip 2 " E.55941 Bolt - Downtake to Manifold 3 " E.56594 Support Nozzle 1 " E.56596 Clip - Nozzle Support 1 " E.78267 Flange - Swan Neck 1 " E.78266 Flange - Swan Neck Branch 1 " E.78266 Stiffener for Swan Neck Branch 1 " E.56963 Sliding Joint 1 " E.56964 Clip - Inter Pipe 1 " E.78894 Nozzle - Swan Neck 2 " E.57021 Spherical Washer - Downtake 1 " E.57005 Flange - Downtake 1 " E.57558 Heat Shield - Front 1 " E.57564 Silencer Support Bracket 4 " E.57565 Stiffener - Front Support Bracket 1 " E.57566 Silencer Support - Rear 1 " E.57567 Bracket - Rear Heat Shield 2 " E.57568 " " - Front " 1 " E.57569 " " " " 1 " E.57570 Silencer Support - Front 1 " E.57571 Support - Heat Shield 10 " E.78891 Stiffening Piece - Nozzle 4 " E.57777 Support - Inter Pipe 1 " E.57780 Silencer End Piece - Front 1 " E.57781 Inter Pipe - Rear 1 " E.78261 Stiffener - Rear Support Bracket 1 " E.78892 Stiffening Tube - Nozzle 2 " contd:- | ||