AEROGRAPHER'S MATE 3 & 2 



•*„<?, \<£, "^-J. * 



,*o V?> %1> *->So Vo \% \'o %% \o ','„ %& '•>& v-b 



Figure 11-32. — Example of dry adiabats on the SKEW-T Diagram. 



209.410 



a one-eighth-inch circle drawn around each 

 plot (O). After plotting all levels connect each 

 plot with a solid blue line. 



3. DEW-POINT TEMPERATURE CURVE- 

 Subtract the dew-point depression from the tem- 

 perature for each level and plot as described 

 for the temperature curve. These points are 

 connected by a dashed blue line. To assist in 

 plotting the dew-point curve and to conserve 

 time, a dew-point depression plotting scale 

 (DOD WPC 9-16-5) has been devised. It is 



a clear plastic strip with numbers printed on 

 both edges and imprinted in increments equal 

 to one degree (1°) of temperature. These in- 

 crements enable you to plot the dew-point de- 

 pression directly from the report without a 

 mathematical conversion. 



4. PRESSURE ALTITUDE CURVE-To ac- 

 complish this a modification to the chart must 

 be made. Starting with the 40-degree isotherm 

 on the right hand side of the chart, label it 

 O meters and for every suceeding 10-degree 



234 



