The designing process together with summarized design theories on individual parts of the blade is presented on the basis of the author's research related to design theories of rotary blades done in last several years.
　An example of the flow chart for planning design which is necessary to complete the drawing of the blade is proposed in Fig. 2. However, only an initial half of the whole series of drafting steps, i.e., from the start to (f) of the flow chart shown in Fig. 2 is given in (a) through (f) of Fig. 3, because this paper constitutes part 1 of the whole paper.