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).
Troubleshooting overheating and vibration issues in a 22-EU chassis 'Barker' inside drive Cabriolet.
| Identifier | ExFiles\Box 47\1\ Scan160 | |
| Date | 16th October 1925 | |
| COPY. To: "BJ" - copies to "W" & "Hg". from "Ps". -------------------- Chassis 22-EU. - Mr. Soulas. "Barker" inside drive Cabriolet. (Prince of Wales type). We beg to submit particulars of progress made towards curing overheating troubles on the above car, called for in memo. BJ3/H.7.10.25. The customer gave us the car for four days, and the following is a precis of notes taken, and work effected :- Complaint - overheating & vibration in engine. Test before repairs. Atmospheric temperature 17°C. Two people up - car fully closed and complete kit. Bellevue test hill - 2.5 km. long - very steep with two hair pin bends. Very few cars do this on top gear. Temp. of water at bottom. 75°C. " " " " top. 92°C. Failed to climb in top gear, but changed into top when sufficient way was possible. Second test in third speed, whole distance. Engine heated artificially to 95°C. at bottom of hill. Boiled in climbing (half way up). Notes. Engine was fitted with a high speed fan. Rear shutters of bonnet were open, as run by customer. Notes during dismantling. a.{Mr Adams} Before dismantling cylinders, average capacity with carbon on pistons - 410 cc. equal to approximately 59 lbs. per sq. inch. b. Top water pipe washers overlapping ports, and restricting free exit of water. c. Butterfly valve in exhaust down pipe working sluggishly and inclined to stick. d.{John DeLooze - Company Secretary} Carburation on weak side (noted during test). e.{Mr Elliott - Chief Engineer} Timing of valves & ignition normal. f.{Mr Friese} Thermostatic valve checked to open at 75°C. with 5/16" lift - O.K. [ENCLOSURE N° 492] | ||