FOLLOWING the Air Convention held on the 13th of October, 1919, the I.C.A.N. (International Commission for Air Navigation) laid clown the minimum requirements for Air‐worthiness Certificates for Civil Aircraft, and the regulations for the testing and approval of type and series engines are the subject of Part 5 of their official recommendations.
(1930), "Engines for British Aircraft: Summary of New Regulations about to be Issued for Type Approval and Acceptance Tests", Aircraft Engineering and Aerospace Technology, Vol. 2 No. 7, pp. 181-182. https://doi.org/10.1108/eb029291
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