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).
The conditions for using D.T.D. 230 - 87 Octane Standard Fuel.
| Identifier | ExFiles\Box 27a\4\ Scan278 | |
| Date | 1st December 1933 guessed | |
| contd:-2- D.T.D. 230 - 87 Octane Standard Fuel. This fuel admits the use of tetra-ethyl-lead and may only be used as detailed hereunder:- (a) For Type Tests of certain engines constructed under Air Ministry Contracts when such contracts specify that the type tests be run on a fuel complying with D.T.D. 230. (b) For Production Tests of engines constructed under Air Ministry Contracts when such contracts specify a fuel complying with specification D.T.D. 230. (c) Contractor's Flight Trials, when the engine log book certifies that the production test has been carried out upon fuel complying with Specification D.T.D. 230. (d) Aircraft Delivery Flights, when the engine log book certifies that the production test has been carried out upon fuel complying with specification D.T.D. 230. I am to say that the conditions of this letter shall apply to all current and future contracts. Please acknowledge receipt of this letter. I am, Gentlemen, Your obedient Servant. (Sgd) ? ? Director of Contracts. | ||