semiangle
Noun
an angle of half a given size
The angle formed between the axis of a cone and a line drawn from the apex of the cone to the edge of its base.
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The results show that the optimum cone semiangle decreases slightly when the Mach number increases and, in the range of Mach numbers considered, is in the range of 22° to 25° for supersonic entrance flow.
The author's theory is almost perfect for 5° semiangle, is good for M_∞ ≤ 2 with 10° semiangle, and is beginning to be a serious overestimate for 15° semiangle.
Variations in cone semiangle had no significant effects on the longitudinal stability at the two test Mach numbers .
Word forms
semiangles