Modifications made to C2 for the Brussels-Léopoldville raid
It is in 1927 in one of the Feyens workshops specialized in the construction of industrial and marine engines that the ACAZ C2 was modified for the raid of March 1928. This workshop was located street of Cambre at Woluwe (BAMM 62). Emile Feyens then commissaire of the Zacco company knew well the Commander Thieffry (the initiator of the raid) since they exerted together the same sports activities at the time of their primary studies at the Institute St Stanislas.
The principal modifications made to C2 were:
A new Hispano Suiza's engine of 600 Cv with a new propeller drawn by Louis de Monge
Additional tanks (for a total of 1600 kg instead of 380 kg for gasoline and a total of 80 kg instead of 25 kg for oil), the operating range passing from 790 kms with 3000 kms
Modification of the place passenger for accomodating an additional passenger
Addition in the belly of the aircraft of a propeller of replacement
The weight of the aircraft passes then from 1900 kg to 3200 kilos (in maximun charge) and wing load passes from 46,9 kgr to 79 kgr, from where a reinforcement of the structure and the frame.