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).
Installation tests and modifications report for a production Hawker Hart header tank.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan103 | |
| Date | 7th January 1931 | |
| To R.{Sir Henry Royce} at LaGanndel. c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to Rg.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to Lr.{Mr Ellor} ----------------- ORIGINAL. X4509 Hawkers. Hs{Lord Ernest Hives - Chair}/TAG1/ME.7.1.31. ----------------- INSTALLATION TESTS. PRODUCTION HAWKER HART HEADER TANK-D.26522. A Hawker Hart Header tank was submitted for test and approval by the Hawker Engineering Co. This tank was representative of the intended type for the production 'Harts', and was to be adaptable in the event of supercharged engines being installed in the 'Hart' machines. The nature of the tests was to see if the tank was up to our standard of there being no water loss from the vent when the water was boiled or when the throttle was smartly closed from full open, again with high water temperatures. The tank did not comply with these tests, there being a big water loss at comparative low temperatures, and experiments were carried out applying proven modifications until one was found suitable for the tank. The recommendations were submitted to Messrs. Hawkers who agreed in the main and suggested minor constructional alterations of which further tests were made and proved to be of no detriment to the working of the tank. The tank was then despatched to 'Hawkers' as a model. DETAILS OF TESTS & MODIFICATIONS TO THE HEADER TANK. The tank was tested on a F.{Mr Friese} M.S. engine mounted on the Meccano Hangar tilted at 15°. RUNNING. The engine was run as it would be if installed in a machine regarding the starting and warming up. After the normal temperatures were obtained the throttle was opened to full and the water (outlet) temperature allowed to rise to boiling point. From 80°C. and at every 5°C ^rise up to boiling the throttle is closed smartly noting if water loss at the tank vent is experienced. From 90°C. onwards is the critical period and with the final R.R. recommendations, the maximum loss experienced has only been 0.5 pt. contd. | ||