In 1924, the first cabin WACO aircraft was manufactured, the six-passenger WACO 8, featuring an open cockpit positioned behind the cabin for the pilot and co-pilot, powered by 200 hp (149 kW) Liberty.

A preliminary first flight was made in late Aug 1924, piloted by Clayton Brukner, and an official first flight was made on 21 October 1924, piloted by Tex LaGrone.

Only one WACO 8 was ever sold for $4,500 to an aerial photo company in Kansas City and it was eventually used to aerially map the Ozarks. It was eventually destroyed in a landing accident.

One other Waco 8 was uncompleted.

Engine: 200hp Liberty 6
Wingspan: 40’0″
Length: 32’0″
Usefulload: 1473 lb
Max speed: 90 mph
Cruise speed: 80 mph
Stall: 37 mph
Seats: 8

The Waco team continued to assemble airplanes from parts salvaged from surplus World War I Curtiss Jennys, continuously tinkering with their designs and making improvements.

Similar to the Waco 6, the 1924 Waco 7 used many Curtiss JN-4 parts with new interchangeable wing panels and powered by a 90 hp (67 kW) Curtiss OX-5.

The three-passenger WACO 7 was modestly successful with 16 aircraft sold at $2,500.

Engine: 90 hp (67 kW) Curtiss OX-5
Max speed: 90 mph
Stall: 30 mph

The Waco team continued to assemble airplanes from parts salvaged from surplus World War I Curtiss Jennys, continuously tinkering with their designs and making improvements.

Used many Curtiss JN-4 parts with new interchangeable wing panels and powered by a 90 hp (67 kW) Curtiss OX-5.

The first Troy-built model, the WACO 6, was soon being marketed and four were built

Engine: 90hp Curtiss OX-5
Wingspan: 30’0″
Length: 24’0″
Useful load: 750 lb
Max speed: 88 mph
Stall: 32 mph
Seats: 3

The Waco team continued to assemble airplanes from parts salvaged from surplus World War I Curtiss Jennys, continuously tinkering with their designs and making improvements.

The 1921 Weaver 5 three place open cockpit biplane used many Curtiss JN-4 parts with new interchangeable wing panels and powered by a 90 hp (67 kW) Curtiss OX-5.

Eventually, they sold two WACO 5 biplanes, conversions of JN-4C Canucks, two with 150hp Hisso A engines. Selling for $1,500-2,000, the final one was built at Advance Co in 1923.

Engine: 90h Curtiss OX-5
Wingspan: 37’0″ / 33’0″
Length: 25’3″ / 23’0″
Useul load: 750 lb
Max speed: 80 mph
Stall: 30 mph
Seats: 3

The WACO partners persevered, designing a practical three-seat biplane, the WACO 4, and building it out of parts left over from the Cootie and other biplane efforts. The team continued to assemble airplanes from parts salvaged from surplus World War I Curtiss Jennys, continuously tinkering with their designs and making improvements.

The 1921 Weaver 4 used many Curtiss JN-4 parts with new interchangeable wing panels and powered by a 90 hp (67 kW) Curtiss OX-5.

Selling for $4,000, the model 4 was the company’s first public sale and the last of the all-wood Wacos.

One appearing in early registers as Waco 4 (NABCW) was actually a modified Hisso-Curtiss JN-4 Canuck with Brukner “high-lift” wings.

Engine: 90hp Curtiss OX-5
Wingspan: 28’0″
Length: 23’0″
Useful load: 890 lb
Max speed: 84 mph
Stall: 33 mph
Seats: 3-4

The Weaver 2 Cootie Biplane of 1920 was a single place open cockpit biplane rebuild of the Cootie #1 with a larger tail area and a beefed-up landing gear.

First flown on 14 June 1920, piloted by G Weaver, it eventually crashed in April 1923 having cost $1,500.

A 30hp hydroplane version was begun, but never completed because of funding problems.

Empty weight: approx 340 lb
Speed: 62 mph