The Waco Mailplanes are US-built open-cockpit biplane mailplanes from the late 1920s derived from the

Waco 10 The Waco 10/GXE/Waco O series was a range of three-seat open-cockpit biplanes built by the Advance Aircraft Company, later the Waco Aircraft Company. Design and development The Waco 10 was a larger span development of the Waco 9, both single ...

sports biplanes.

Development

In order to meet the demand for mailplanes, Waco aircraft developed two models during 1929, the JYM and the JWM. The JYM was a taperwing model based on the earlier ATO design but with a 14-inch fuselage stretch to provide further cargo capacity compared with the earlier design. It was powered by a Wright J-6-9 engine and had a single seat cockpit for the pilot.Aerofiles The JWM was a straight-wing model based on the ASO, also with a 14-inch longer fuselage and was fitted with a Wright R-975 powerplant.

Operational history

Four Waco JYM aircraft were delivered to Northwest Airways (later Northwest Airlines) in 1929 and were operated on the CAM-9 airmail route from

Chicago Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...

Minneapolis Minneapolis is a city in Hennepin County, Minnesota, United States, and its county seat. With a population of 429,954 as of the 2020 United States census, 2020 census, it is the state's List of cities in Minnesota, most populous city. Locat ...

via Milwaukee, Madison and La Crosse.bluegrassairlines All four Waco JYM's still exist, with the third JYM ''NC631N'' on display at the

Historic Aircraft Restoration Museum The Historic Aircraft Restoration Museum, located at Creve Coeur Airport in Maryland Heights, Missouri, United States, is dedicated to restoring and preserving historical aircraft. The airplanes in the collection are all fabric-covered, and most ...

(HARM) at Dauster Field near St Louis, Missouri, wearing its 1929 NWAL CAM-9 route markings.Ogden, 2007, p. 331 Waco JWM NX8550 HARM St Louis 10

One Waco JWM aircraft was built. The sole survivor ''NX8550'' is also preserved at HARM, wearing the markings of the "Art Davis Air Circus".

Specifications (JYM)

References

Notes

Bibliography

*
Waco aircraft at Aerofiles.com
{{WACO 1920s United States mailplanes M Biplanes