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).
Engine boiling during take-off, resulting in cracked crowns and blocks, and the proposal of a red lamp warning system.
| Identifier | ExFiles\Box 179b\3\ img391 | |
| Date | 28th March 1933 | |
| -2- Ha/LBH.{Mr Hall - Aero Design Engineer}1/WJ.28.3.33. Cont'd.{John DeLooze - Company Secretary} boiling under 'take off' conditions. All these engines from outside with cracked crowns show signs of detonation and high boost pressures, and the cracks show that in addition they must at times be run boiling under these conditions. As the cracked blocks are to be scrapped, they entail a heavy repair bill, and some safeguard is required to prevent this occurring. The most certain method is to have some method of notifying the pilot as soon as his engine boils. The red lamp warning scheme has been developed which works when the water boils, and has successfully passed flight tests. The present trouble provides good grounds for its general adoption. The present 11 S. engines embody the larger water pump and top water rails, but sufficient experience in service has not yet been obtained to enable the improvement to be judged. In any case, if the engines are run boiling for any length of time there is a risk of cracks developing. Ha/L.B.Hall. | ||