A single example of the National Aircraft Corp N-5-300, N829M c/n 301, was built in 1929. A five place monoplane, power was by a 300hp Hisso engine.
Inter-Wars
National Aircraft Corp C-3
The 1929 National Aircraft Corp C-3 was a three place, open cockpit biplane. Two examples were built; NX334E c/n 100 and NX335E c/n 101. Power was an 80hp Anzani and 150hp Hisso A.
National Aircraft Corp
Watts Airport
Beaverton OR.
USA
Circa 1929-31 built a number of aircraft
National Aircraft Aircub Sport
The single example of the 1929 Aircub Sport built, NX27N c/n 2, was designed by Leo C Mohme as a two place open cockpit biplane. Power was originally an 80hp Lee radial, replaced by a 90hp Lambert R-266 in 1930. The registration was cancelled on 1 January 1932.
National Aircraft Co
211 W Front St
Plainfield NJ.
USA
Circa 1929 built the Aircub Sport
Nash Aircraft N
A three place monoplane built in 1928.
Nash wrote to CAA on 9 March 1930, “Dismantled, motor went to the bad. I am holding ship for sale without motor.”
Only the one was built, registration N6811. The registration was cancelled on 28 March 1930.
Engine: Gnôme rotary, 165hp
Wing span: 32’8″
Length: 23’10”
Seats: 3
(Paul) Nash Aircraft Co
Chapin IL.
USA
Circa 1927 built the Nash Aircraft N
Companhia Nacional de Navegagao Costiera
Brazil
Companhia Nacional de Navegagao Costiera, founded at llha do Viana, Rio de Janeiro, in late 1930s to manufacture Muniz-designed M-7 and M-9 biplane trainers; basically an Army aircraft workshop. In early 1940s renamed Fabrica Brasileira de Avioes.
Nardi FN.315

As a 1938 development of the FN305, there were also 25 F.N.315 intermediate trainers with the 172-kW (230-hp) Hirth HM 508D inline, a revised canopy, a new tail unit, flaps and increased dihedral on the outer wing panels.
The F.N.315 was also produced with the Alfa Romeo 115-1 of 185 hp.
The F.N.315 was exported to six countries, and a light-attack version was flown experimentally.
Engine: Hirth HM 508, 172 kW (230 hp).
Wingspan: 27 ft 9 in
Wing area: 129.12 sq.ft
Length: 22 ft 11 in
Height: 6 ft 10.5 in
Empty weight: 1562 lb
Loaded weight: 2255 lb
Max speed: 239 mph at 8200 ft
Cruise: 220 mph at 11,480 ft
Time to 13,120ft: 6 min 40 sec
Cruise range: 590 mi
Nardi FN.305

First flown in January 1935, the F.N.305 training, touring and sporting aeroplane had single or tandem seating under a large glasshouse canopy and, with a 149-kW (200-hp) Fiat A.70S radial, attained a fair level of performance thanks to its retractable landing gear. Several one-off variants were produced before Piaggio started building the F.N.305A two-seat version with the Alfa-Romeo 115 inline. The type was used by the Italian air force as a tighter trainer and liaison aeroplane. Between 1937 and 1943 production totalled 258 including small numbers of the F.N.305B and F.N.305C single-seaters with open and enclosed cockpits respectively.

An experimental version, the F.N.305-D, established s long-distance record by flying from Rome to Addis Ababa.
F.N.305
Wingspan: 27 ft 9 in
Wing area: 129.12 sq.ft
Length: 22 ft 11 in
Height: 6 ft 10.5 in
Empty weight: 1320 lb
Loaded weight: 1980 lb
Max speed: 211 mph
Cruise: 189 mph
Service ceiling: 22,950 ft
Range: 435 mi
F.N.305A
Powerplant: l x Alfa-Romeo 115-1, 142kW (190 hp)
Span: 8.47m (27ft 9.5in)
Length: 7m (22 ft 11.5 in)
Armament: 1 or 2 x 7.7-mm (0.303-in) mg
Max T/O weight: 900kg (1,9841b)
Max speed: 193 mph
Operational range: 311 miles.