L-749 Constellation / Delta Experimental and Prototypes developed from the P-36

developed from the P-36

Wingspan 19 inches

but was simply known as Songbird

Wingspan 23 1/2 inches

the United States was ready to send of its own first man into space aboard the Mercury Space Capsule

L-749 Constellation / Delta Experimental and Prototypes developed from the P-36Delta Airlines Constellation model. Design of the Lockheed L 749 began in 1939 to meet the requirement of Pan American Airways and Transcontinental &amp, Western Air (now Trans World Airlines), for a 40 passenger airliner for use on domestic routes. Manufacture of the airplane was initiated, but with the outbreak of World War II aircraft on the production line were commandeered for service with the USAAF as transports under the designation C 69, the