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).
Requirements for test rigs, specifically for wheel tests and fan belt endurance tests.
| Identifier | ExFiles\Box 159\6\ scan0074 | |
| Date | 9th April 1940 | |
| To Rm.{William Robotham - Chief Engineer} Ref EB.14/JH.9.4.40. TEST RIGS. In reply to your note Rm.{William Robotham - Chief Engineer}9/JH.13.3.40. it will be most convenient to take the items in this note in the reverse order. This wheel test will be included in the B.E. machine. The fan belt test which you mention has been drawn but is now held up. It consists of a blower, powered by an 8 H.P. motor feeding into a small wind tunnel. At the far end of this is a standard or radiator, and triangle drive components. Provision is made for heating the water which passes through the radiator. A rig such as this is needed for:- (1) Endurance tests on fan belts (The Buick fan belt test is 300 hours at 4000 crankshaft r.p.m. The crankshaft speed at maximum car speed is 4500 r.p.m. The fan dissipation is 11 H.P.) (2) Study of belt slip. (3) Any tests on variable pitch fans or variable ratio fan drives. The motor shown on the drawing is that from the single cylinder test bed. Presumably this motor is no longer available for this job, so that a new 25 H.P. variable speed motor is required. This should be on gimbals so that the power absorbed could be measured. The centre bed plate could be omitted if the right hand bed plate were removed a little to the left. Cont'd.{John DeLooze - Company Secretary} | ||