§ Mr. VIANTasked the Secretary of State for Air what were the results of the tests on the hydrogen-kerosene engine purchased from the Airship Guarantee Company in March, 1926; if he is now in a position to say whether or not the engine will be of any practical value; and how much money, in 2195W cluding cost of purchase, has been spent by the Air Ministry on this machine up to date?
§ Sir S. HOAREAs regards the first two parts of the question, the hydrogen-kerosene engine has now been reconstructed in the light of the criticisms of departmental experts and has passed acceptance tests. This type of engine is still in an experimental stage, but it has certain features which may well prove it to be, when developed, the best suited for airship purposes. Further tests are at present in hand, but the process of developing any engine is necessarily a lengthy one. The answer to the last part of the question is, approximately, £15,000.