FTAG-E5 New design. Closed transport in a streamlined shape for gliders . Detachable hood total , light weight, small width and depth and low center of gravity easier to deal with this transport considerably . License-built : About 800 units were built .
FTAG-E6 A further development of the project and E5 Transport for E3
FTAG-E7 Contract for glueing experiments ordered by the Reich Air Ministry together with the TH Darmstadt and the TH Stuttgart. Hundreds of experiments in metal , foam, and plastic glueing for fuselage and wing skins were conducted as preliminary work for the mass production of large aircraft.