The single Trella T-103 built, in 1930, was a two place open cockpit biplane powered by a 90hp Lambert engine.
1 engine
Trella T-102

The 1928 Trella T-102 N10509 c/n T-18 was an improved T-101 two place open cockpit biplane. Only one was built, powered by a 65hp Velie M-5 engine.
Trella T-101 Speedster

Trella built the T-101 NX6775.
The 1926 T-101 (Speedster) was a two place open cockpit biplane, powered by an 80hp Anzani and registered NX6775. Only one was built.
Trella T-100
The 1924 Trella T-100 was designed by Frank Trella. It was never flown because of insufficient take-off power, but used extensively for taxiing instruction. A single place, open cockpit biplane, it was powered by a 30hp Ford T conversion.
Trella T-19
The Trella T-19 was powered by an “R-266” engine and registered N13579 c/n 119.
Trella Speedster T-17
A two-seat open cockpit biplane, powered by a Le Blond radial engine. Built in 1929, the Sportster T-17 cost $2,725.
Engine: 60hp LeBlond 5D or 55hp Velie M-5
Span: 27’6″
Length: 19’8″
Usefulload: 450 lb
Max speed: 110 mph
Cruise: 98 mph
Stall: 36 mph
Range: 400 mi
Seats: 2
Treffinger T-1-HD
The Treffinger T-1-HD N15777 was built in 1938 by Edward Y Treffinger as a two-place, open cockpit biplane. Power wasfrom a 27hp Harley-Davidson engine.
Trébucien Sport

Built in France, the single-seat Trébucien Sport was a low wing monoplane of wood construction.

The Sport was built circa 1935.

Engine: Train, 40 hp
Span: 6.60 m
Wing area: 7.50 m²
Length: 4.70 m
Maximum speed: 200 kph
Ceiling: 6000 m
Range: 600 km
Crew: 1


Treadwell Alley Cat

In 1999, Walter Treadwell built the single place, enclosed cockpit, low monoplane wing Alley Cat. Only one was built, registered N434AC, s/n 004.
Engine: Continental O-200
Travel Air Huff-Daland
Two 1928 Huff-Daland (ATC 2-26) were contract-built by Travel Air as Louisiana crop dusters. They were single-place, open cockpit biplanes, powered by a 90hp Curtiss OX-5.