One Nord 1104 Noralpha was fitted with a 240 horsepower Potez 6D-0 for trials and two earlier 1101 Noralphas were converted with a Turbomeca Astazou II turboshaft engine as the S.F.E.R.M.A.-Nord 1100 Noralpha (S.F.E.R.M.A. - Société Française d'Entretien et de Réparation de Matériel Aéronautique) in 1959.