Investigations have been carried out in connection with the testing of a definite aeroplane type in order to ascertain the extent to which the safe take-off can be sufficiently ensured by prescribing certain practical requirements.

This led to inquiries into the question as to whether the qualities of the aeroplane in the take-off could be determined from individual tests, in such a way that it would be possible, from the results, to determine the take-off path when climbing in conformity with a definite previously established policy.

The present report consists of an analytical consideration of the safety in the take-off, which may be used as a practical guide for the predetermination of a safe take-off policy, and a means whereby the dimensions of an aerodrome, such as shall meet the rational requirements for a safe take-off (of a definite aeroplane type), can be determined.