asked the Secretary of State for Air what progress has been made with the helicopter system of flying.

Satisfactory progress is being made with the experiments which are being conducted by the Air Ministry, and to which I assume that the hon. and gallant Member refers, and I hope that a trial will take place shortly.

Is the reward still available for any private inventor?

Yes, Sir. I am offering a reward, and I think it is included in this year's Estimate.

Is every encouragement being given to private inventors, as well as to the Royal Aircraft Factory, to produce the best machines?

Yes, the inventor now actually engaged in this work is a private mechanic.

Will steps be taken, on this question of the invention of air appliances, to prevent the disgusting outcome of investigations made during the War?

Adjectives are not allowed at Question time.