The 1927 PA-5 Mailwing single-place biplane received ATC 18. At least 21 were built, priced at $9,850-10,000, including; NC94, NC500, NC549K, C1515, C2895, C4321/4325, C5062, C5117, C5129, C5564, C5636, C5677, C5808, C5863, NC6617/6618, NC6708.

The Sport Mailwing, also under ATC 18, was a three-place “civilianized” version of the PA-5 mail plane.

PA-5 Mailwing
Engine: 220hp Wright J-5
Wingspan: 33’0″
Length: 21’11”
Useful load: 822 lb
Max speed: 131 mph
Cruise: 105 mph
Stall: 50
Range: 435
Ceiling: 18,000′
Seats: 1

Sport Mailwing
Engine: 220hp Wright J-5
Wingspan: 33’0″
Length: 21’11”
Useful load: 822 lb
Max speed: 131 mph
Cruise: 105 mph
Stall: 50
Range: 435
Ceiling: 18,000′
Seats: 3

The 1927 PA-4 Fleetwing 2, or Deluxe, received ATC 2-21. The prototype NC3216 later converted to PA-4W.

Eleven were built; C1514, X2359, C3216, C3228, C4920, NC7032, NC7443, NC7558, NC7756/7757.

The 1928-30 PA-4K and PA-4W Fleetwing 2 were approved for 100hp Kinner K-5 (ATC 2-230) and 110hp Warner Scarab (ATC 2-193). One each -4K [NC10130] and -4W [NC3216] for conversions as engine test-beds.

PA-4 Fleetwing 2 / Deluxe
Engine: 90hp Curtiss OX-5
Wingspan: 33’0″
Length: 22’2″
Useful load: 785 lb
Max speed: 102 mph
Cuise: 87 mph
Stall: 45 m
Range: 400 mi
Seats: 3

PA-4K Fleetwing 2
Engine: 100hp Kinner K-5

PA-4W Fleetwing 2
Engine: 110hp Warner Scarab

The 1927 Pitcairn PA-3 Orowing (ATC 2-20) three-seat open cockpit biplane used Used Curtiss Oriole wings.

About 40 were built, including; NC78, NC175/178, NC248, NC280, N283K, NC572V, NC977/978, NC983/984, NC991/995, C1177/1178, C1258, C1655, C1658, C1698, C1984, C2699, C2735, C2781/2783, C2855, C2916, C2936, C2993, C4291, C4300, C4355, C5032, NC6659

Engine: 90hp Curtiss OX-5 or 100hp OXX-6
Wingspan: 36’0″
Length: 26’2″
Useful load: 755 lb
Max speed: 90 mph
Cruise: 78 mph
Stall: 40 mph
Seats: 3

The 1926 PA-2 Sesquiwing (aka Arrow) was built for racing. Powered by a 160hp Curtiss C-6 engine, it was a quick-change convertible to a 90hp Curtiss OX-5 in 31 minutes.

Registered NC10222 for the 1926 Nationals, but it did not finish because of motor problems.

Engine: 160hp Curtiss C-6
Wingspan: 32’0″
Length: 22’6″
Useful load: 754 lb
Max speed: 145 mph
Cruise: 120 mph
Stall: 60 mph
Range 360 mi
Seats: 2

Engine: 90hp Curtiss OX-5
Wingspan: 32’0″
Length: 22’10”
Useful load: 746 lb
Max speed: 120 mph
Stall: 60 mph
Seats: 2

Austrian / French designer Alfred de Pischoff built a bare minimum ultralight in 1921-22.

The fuselage is two horizontal tubes fixed together by three other tubes. The pilot sits on a saddle and the engine, a Clerget-Blin two-cylinder rated at 16 hp, was also the bare minimum. The landing wheels were set into the lower wings.

A Mr. Pillot (in photo) and Alfred de Pischoff flew the machine. Pillot was mortally wounded when the machine crashed into the ground on 12 August 1922.

Only one copy was built.

Engine: Clerget-Blin, 16 hp
Wingspan: 17 ft / 5,20 m
Length: 11ft 6in
Height: 4 ft 3.25 in
Wheel track: 2 ft 7 0.5 in
Speed: 90 – 95 km/h
Endurance: 2 hrs