Piper J-4

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J-4 Cub Coupe
Piper J-4A at the Pima Air Museum in Tucson, Arizona
Type: Small plane
Design country:

United States 48United States United States

Manufacturer:

Piper Aircraft

First flight:

May 1938

Commissioning:

1938

Production time:

1938-1942

Number of pieces:

1251

The Piper J-4 Cub Coupe is the two-seat version of the Piper J-3 with side-by-side seats. It was built by the American manufacturer Piper Aircraft between 1938 and 1942 and was Piper's first model with this seat configuration. In connection with its good-natured flight behavior at low speeds, it was well suited as a training aircraft .

construction

Piper J-4A Cub on the Detroit River , 1946

The design of the J-4 is based on the J-3 with various changes . Among other things, the fuselage was widened, the landing gear was equipped with an oil pressure suspension and the tail wheel was modified. The first J-4 were powered by a Continental A50 with overhead exhaust and open cowling . Although these aircraft had a comfortable cockpit, they were slower than contemporary aircraft with side-by-side seats.

From 1940, the J-4A was built with a closed cowling and a Continental A65 with a nominal output of 65 hp (48 kW) and an additional tank in the rear. A Franklin 4AC -171 with 60 hp (44 kW) was used in the J-4B . The last version of the J-4, the J-4E, was built from 1941. The interior of the J-4E was revised and the engine replaced by a Continental A75 with 75 PS (55 kW). In addition, the main fuel tank was relocated to the wings . The performance of the J-4 thus caught up with that of similar, contemporary models . However, the attack on Pearl Harbor ended the production of the J-4 because with the entry of the United States into World War II, the production of civil aircraft came to a complete standstill.

Versions

J-4
driven by a Continental A50 -1 with 50  PS (37  kW )
J-4A
driven by a Continental A65 -1 or -8 with 65 PS (48 kW)
J-4B
powered by a Franklin 4AC -171 or -176-B2 with 60 HP (44 kW)
J-4E
driven by a Continental A75 -9 with 75 PS (55 kW)
J-4F
powered by a Lycoming O-145 -A1 or -A2 with 55 HP (40 kW) or a Lycoming O-145-B1 with 65 HP (48 kW)

Technical data (J-4A)

Parameter Data
crew 1
Passengers 1
length 22.5  ft (6.86  m )
span 36.2 ft (11.03 m)
height 6.8 ft (2.07 m)
Max. Takeoff mass 1,300  lb (590  kg )
Cruising speed 80  kn (148  km / h )
Top speed 87 kn (161 km / h)
Service ceiling 15,000 ft (4,572 m)
Range 310  NM (574  km )
Engines Continental A65 -1, 65 PS (48 kW)

See also

Web links

Commons : Piper J-4  - collection of pictures, videos and audio files

Individual evidence

  1. ^ A b Rod Simpson: Airlife's World Aircraft . Airlife Publishing Ltd, 2001, ISBN 1-84037-115-3 , pp. 429 (English).
  2. ↑ Piper J-4A Cup Coupe. Pima Air & Space Museum, 2020, accessed March 12, 2020 .