CNA DThe CNA D, often known as the CNA D.4, was a four-cylinder, air-cooled, horizontally opposed engine built in Italy by Compagnia Nazionale Aeronautica between 1940 and 1951 to power light aircraft.ApplicationsData from Erickson Adam RA-14 Loisirs Ambrosini SAI.10 CNA PM.1 CNA MPL CVV Tartuca Druine Condor GCA Pedro GCA Etabeta Lombardi FL.3 Lombardi FL.5 Lombardi FL.7 Macchi MB.308 Viberti Muscal