Despite the fuel saving predictions, public and industry perception of propellers and concerns over the technical challenges delayed the go-ahead of the ATP until 1978.

• 可是公众和业界都轻视了省油的目标，过分的考虑和关心螺旋桨和技术门槛很高的问题，延迟了ATP的进展，直到1978年才有重大的突破。