The HD models are primarily used for towing and high-weight cargo.
2.
Accordingly, in 1947 " Direction Technique Industrielle " organized a design competition for a medium-weight cargo aircraft offering great flexibility in use . " Soci�t?Nationale de Construction A�ronautique du Nord " ( SNCAN ) answered with the Nord 2500, while their competitors, " BR-891R Mars and SO-30C respectively.