Test report on modifications to exhaust fittings, radiator, and radiator shutters, detailing performance issues and failures.
| Identifier | ExFiles\Box 83\1\ scan0254 | |
| Date | 12th August 1936 guessed | |
| ( 15 ) EXHAUST FITTINGS. LOP EB.2828. Complete to above LOP incorporating:- Straight through pipe in 14 SWG. S/M. (aluminised) Lagging covers in 24 SWG. S/M. nickle plated. EB.3006 Rear Intermediate Pipe - 16 SWG. S/M. Rear Silencer similar to Front Silencer, deleting EB.877 & EB.881 Pipes and centre baffle, fitting straight through perforated tube. Rear Silencer lagged similar to Front Silencer. Tail Pipe made with inner pipe in perforated tubing 1.750 dia.- outer tubing 16 SWG. S/M 2.750 dia. Arear between fitted with "Zonolite" End Covers welded in position "Zonolite" supplied by Hs {Lord Ernest Hives - Chair} /Wym. {G. Harold Whyman - Experimental Manager} EB.3009 Front Silencer-centre pipe made from perforated tubing. The new exhaust system was good for silence and free from booms. At 11.339 miles, the outlet pipe from the intermediate silencer cracked away at the weld. It was re-welded, but at 15.170 miles it pulled right out. The end plate of the silencer had broken away round the weld, the weld remaining intact on this occasion. It was again welded. The inlet pipe to this silencer also had to be re-welded as the weld started to crack. The aluminium link of the rear suspension bracket was badly worn by the top bolt. It was drilled out and a brass bush fitted. The aluminium bobbins also wore badly allowing side float on the bolt. Steel washers were fitted instead, bearing on the ends of the brass bush. No further trouble was experienced. RADIATOR. LOP EB.1089. Standard GHH Complete to above LOP EX.B.23.AF.Chassis. Incorporating 52 m {Mr Moon / Mr Moore} /m Mark VI Matrix. RADIATOR SHUTTERS. LOP EB.1900 HS. {Lord Ernest Hives - Chair} 2083. Existing, spring loaded type incorporating:- Ex.20051 Bearing Strips. Ex.20056/7 Carrier Springs .018" Ex.20058/9 Pivot Pins. Ex.20060/1 End Bearings. Ex.20062/3 Levers. Ex.20064 Bearing Pins. Initial Spring Load .005" Shutters made as free as possible. The cooling has been most satisfactory. The maximum water temperature under daily running conditions was 82°c even when the air temperature was 32°c. On a long hill with prolonged full throttle and maximum torque (about 1700 rpm.) 84°c was the maximum reached. The shutters required setting when received, after which they gave a good control of the temperature. They rattled badly on rough roads and were particularly noticeable at low speeds in villages. Loss of water was negligible under all conditions. [Handwritten text top left] Coman What mods are we making to production this? PW [Handwritten text bottom left] Stedman What about reducing radiator HT & cost still further | ||
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).