Figure 209 - Airship form constructed with use of a source and a line of sinks. 



Streamlines due to the source and sinks alone are shown above, resultant 



streamlines below. See Section 125. (Copied from Reference 8.) 



Figure 210 — Two airship forms constructed by Fuhrmann. 



In the upper two figures the assumed distribution of sources and sinks is plotted along the axis, 

 and streamlines due to them alone are shown above the axis; resultant streamlines in the flow past 

 the solid are shown below the axis. In the lower figures the calculated pressure distribution is 

 shown by a solid curve in comparison with pressures as observed on a model in air, represented by 

 small circles. The flow is from the left. See Section 125. (Copied from Reference 133.) 



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