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May 15, 1920
Omaha-Chicago, with a stop at Iowa City, Iowa

Aeronautical Bulletin No. Route Information Series May 15, 1924

 

Red thumbtacks indicate regular Airmail Fields
Yellow thumbtacks indicate emergency Airmail Fields

(The air mail miles)
Compass course,. Magnetic declination,

1924 Air Navigation Map No. 9, (experimental) Milage Pilot's Instructions
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63

 

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105

 

115

 

  121

 

125

 

  135

 

149

 

160

 

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185

 

195  

It must be remembered that all the way on this course you have been following the night-flying beacons, which are located every 3 miles and are painted white and are large enough to be easily seen, from 1,500 or 2,000 feet. To get your course at any time it is only necessary to line two of them up and follow that line to reach the next emergency field. Of course, the direction slightly changes for the courses between various fields. (another photo)

 

Google Earth Map (2016)
(click on map for larger version, landing field locations best guess from Aeronautical Bulletin Map Sketches)
Milage Description
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46

 

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85

 

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106

 

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130

 

146

 

  156

 

169

 

180

 

  195

 

On this entire course, you have been following the night flying route with its 3-mile beacons, and in order to check up at any time on your course it is only necessary to line a couple of these lights up.

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Route Information Series:

Aeronautical Bulletin No. 155, May 15, 1924

 

The regular airmail Chicago stop was at Grant Park, but flying conditions near Lake Michigan were too often far from favorable. The conditions at and location of Checkerboard Field were much better. 

During the early 1920s air mail operations at "Checkerboard Field" was moved across First Avenue to two longer runways used only for the air post operations. (Although this other field had another official name it was still referred to by most people as Checkerboard Field or as the Maywood airfield.) These runways were on the grounds currently occupied by the Edward Hines Jr. Memorial Hospital, where it remained until the post office turned over transcontinental routes to private contractors in 1927. 

In 1923, Behncke sold the field to Wilfred Alonzo Yackey, a former military and airmail pilot. From 1923 until Yackey's death in an airplane crash, the Yackey Aircraft Company and Checkerboard Field were the center of aircraft manufacturing activities in the Chicago area. 

From 1923 to 1927 the field provided air mail operations. It was also called Maywood Air Mail Field at this time. 

The airmail company operating with Maywood Air Mail Field was the Robertson Aircraft Company. The company's chief air mail pilot was a Charles Lindbergh. One of Mr. Lindbergh's duties was to lay out the 285 mile route between Saint Louis to Maywood. The route included nine intermediate landing fields about every 30 miles. The intermediate landing fields were necessary due to the equipment and operating conditions of the day.