Page:Aerial Flight - Volume 1 - Aerodynamics - Frederick Lanchester - 1906.djvu/280

§ 179 are supposing that the ah- that reaches the plane $$z\ z$$ between $$b\ b$$ and $$c\ c$$ has received momentum pro rata with that within the region bounded by $$b\ b\ b_1\ b_1 ,$$ that is to say:—

§ 180. $$\kappa$$ and $$\epsilon$$, Plausible Values.—We are now able to find an expression for $$\kappa$$ in terms of $$c ,\ C ,$$ and $$n$$, for we already have the equation—

the rest is a matter of choosing such a value of $$e$$ as fits in best with experience. The author has taken $$e = 3.3 ,$$ and this is the basis on which the following Table of plausible values of $$\kappa$$ and $$\epsilon$$ is founded.

§ 181. Best Value of $$\beta .$$ Least Value of $$\gamma .$$—Assuming the values given in the Tables (I., II. and III.), we are now in