Mong MS1 Sport



The Mong MS1 Sport was originally designed and built by Ralph Mong, Jr. of Tulsa Oklahoma in 1953. The prototype was quite successful and Ralph subsequently decided to make the plans available for purchase. Since then, a number of these “homebuilts” have been made. The plan specification called for a Continental 65 hp engine. Unlike many other bi-planes with flying wires for wing bracing, the Mong Sport used a single strut, thus reducing drag and vibrations that were common to the wires. Considered amateur built, Mong Sports are flown under the FAA’s Experimental classification.


This MS1 Sport was previously owed by Nick Luckl. It was purchased and subsequently repaired by Robert McAuley and Lewis University students prior to being sold to Marcellus Foose in 1996.

Average Cost Varied from builder to builder as the source of materials was discretionary
Wingspan: 16 ft. 10 in.
Length: 14 ft 1 in
Height: 6 ft. 0 in.
Weight: empty: 550 lb, loaded max. 960 lb
Engine: Continental A-65-8 4-cylinder reciprocating
Speed: cruise: 85 MPH, Max: 115 MPH
Range: 200 miles
Engines:  1 Continental A65 Horizontally Opposed (65 bh)
Fuel: 16 gal.