|Brazilian Navy CAP-4 preserved at the Museu Asas de um Sonho|
|Number built||ca. 840|
The CAP-4 Paulistinha was a military and civilian trainer aircraft built in Brazil during the 1930s and 40s. It was originally developed by Empresa Aeronáutica Ypiranga (EAY) as an unlicensed copy of the Taylor Cub powered by a Salmson 9Ad radial engine. It featured a high strut-braced wing, two enclosed tandem seats, and a steel-tube fuselage with fabric covering. Its tailwheel undercarriage was not retractable.
The type was widely successful, with nearly 800 units being produced for Brazil's flying clubs and armed forces, as well as for export to Argentina, Paraguay, Chile, Uruguay and Portugal. At the time of peak production in 1943, a new CAP-4 left the factory every day, and production continued until 1948.
In 1956, Sociedade Aeronáutica Neiva (Neiva) acquired the rights renaming it to P-56 Paulistinha, the design was used as the basis for an agricultural aircraft, the P-56 Agricola, adding a fibreglass chemical hopper and spraybars, but this was unable to compete with imported, purpose-built agricultural aircraft.
- EAY-201 - original radial engined version
- CAP-4 - main production version
- CAP-4B - air ambulance version (2 prototypes built)
- CAP-4C - artillery-spotting version
- P-56 Agricola - agricultural version by Neiva (60 built)
- Paulistinha 56-C - Powered by 90 horsepower (67 kW) Continental C-90-8F/12F engine. 256 built by Neiva between 1958 and 1964.
- Paulistinha 56-D - More powerful version with 150 horsepower (110 kW) Lycoming O-320-A1A. Single prototype built, which was designated L-6A by Brazilian Air Force. No production.
- Paraguayan Military Aviation 4 aircraft bought in the early 1960s
- Paraguayan Aeroclub 4 aircraft bought in the 1950s
Data from Jane's Fighting Aircraft of World War II
- Crew: Two, pilot and instructor
- Length: 6.65 m (21 ft 97⁄8 in)
- Wingspan: 10.10 m (33 ft 15⁄8 in)
- Height: 1.95 m (6 ft 43⁄4 in)
- Wing area: 17.0 m2 (183 ft2)
- Empty weight: 320 kg (705 lb)
- Gross weight: 540 kg (1,190 lb)
- Powerplant: 1 × Franklin 4AC air-cooled flat-four engine, 48 kW (65 hp) each
- Maximum speed: 155 km/h (97 mph)
- Cruising speed: 140 km/h (87 mph)
- Range: 500 km (312 miles)
- Service ceiling: 4,000 m (13,120 ft)
- Rate of climb: 3.1 m/s (610 ft/min)
- Taylor 1969, p. 10.
- Bridgman 1998, p. 100.
- Bridgman, Leonard (1998) [1946 (Reproduction of 1945/46 Jane's All The World's Aircraft)]. Jane's Fighting Aircraft of World War II. Twickenham, UK: Tiger Books. ISBN 1-85501-994-9.
- Taylor, John W. R. (1969). Jane's All The World's Aircraft 1969–70. London: Sampson Low Marston & Company. ISBN 0-354-00051-9.
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 230.
- Aeroclube de Joinville website
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