Circa 1923 and probably a modified Curtiss JN-4 with odd rudder and overhanging ailerons. Minuscule lettering at top of rudder says: “Advance Aircraft Co,” and on fuselage is: “DISPATCHEUR” and “C-3.”

Dated 1 July 1923, the pilot is identified as H.A. Kulberg and the wingman as V.C.Babcock “of the Advance Aircraft Co”.

The 1924 Advance International was a Waco-built fuselage and gear, plus modified wings from a German Rumpler, as well as other surplus components. The one built only flew a few times and was dismantled in 1925, never being officially recorded on inventory or having a company c/n assigned.

Engine: Clerget, 130hp
Wingspan: 30’0″
Length: 21’0″
Sats: 3

The 1927 Advance 125 or Siemens Waco (ATC 26) sold for $5,300. About 30 were built, of which one was refitted 97hp Siemens SH-12 in 1928.

Engine: 125hp Ryan-Siemens SH-14
Wingspan: 30’7″
Length: 23’9″
Usefulload: 730 lb
Max speed: 112 mph
Cruise speed: 96 mph
Stall: 37 mph
Range: 350-400 mi
Seats: 3

The Adler G.IIR light two-seat biplane was formerly the Gerner G.IIR.

The Adcox Student Prince was a two-seat open-cockpit biplane designed by Basil Smith and built by the students of the US Adcox Aviation Trade School in 1929. It was based on the one-off Adcox Special, and the first example flew on 17 September 1929 (piloted by Basil Smith), powered by an 85hp Cirrus Mk III. The Cirrus, with inherent dependability problems, was soon replaced by 100hp Kinner K-5.

A single example of a Student Prince X (NC10686) was produced in 1931 powered by a 90hp ACE engine.

A total of six were built of which only 3 were certificated (NC263V, NX828M, NC893K) under ATC 2-258. The other three being restricted to flights within Oregon. The last one ended up certificated after WW2 as an amateur-built aircraft.

As of 2004, a single example remains registered in the United States, which was successively re-engined with 100hp Kinner K-5, then 110hp Warner Scarab Junior, Comet 150hp, 150hp Wright-Hisso A and 220hp Continental E-225 in 1963.

Gallery

Student Prince
Engine: 1 × Cirrus Mk III, 85 hp (63 kW)
Wingspan: 30 ft 3 in (9.22 m)
Length: 23 ft 6 in (7.16 m)
Useful load: 585 lb
Maximum speed: 110 mph (177 km/h; 96 kn)
Cruise: 85 mph
Stsll: 37 mph
Range: 500 mi (434 nmi; 805 km)
Capacity: 2

The 1931 Adcox Cloud Buster was a two place, enclosed monoplane, powered by a 40hp Salmson AD-9.

Only one was built, as a student project and registered NC10644.

The craft was repowered in 1936 with 65hp LeBlond.

This appears in some regs as a product of Bidwell-Yale Aviation Co. As the Adcox A-100, it was sold to Groat Aeronautical, who sold it to Shirley P Yale Air Service, who in turn sold it to William B Bidwell on 20 Agust 1931, at which time it was called Cloud Buster Junior. It then went through several other owners before being scrapped in 1938.

The 1929 Adcox Special was a two place, open cockpit biplane, powered by a 100hp (75 kW) Kinner K-5.

One was built as a student project (10471) at the US Adcox Aviation Trade School and the design evolved into the Adcox Student Prince.

The 1929 Adcox 1-A was a 2 place, open cockpit biplane.
Hisso powered, one example was built (X246K c/n 1001).