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Waco AVN / ZVN / UC-72J / UC-72L
The Waco N series is a range of 1930s American-built cabin biplanes with a fixed tricycle undercarriage introduced in 1937. It was based on the Waco C series five-seat Custom Cabin Waco with that model's curved pointed wings, but with a fixed tricycle undercarriage and a modified tail with a lower rudder extension to give increased side area. The Waco N was fitted with flaps on all four wings to improve the aircraft's landing characteristics.

The prototype, was designated ZVN-7, with the '7' indicating its year of manufacture (1937), and was powered by the 285 hp (213 kW) Jacobs L-5 engine. Only around 20 examples of the N series were completed, as the AVN-8, and ZVN-8. This included ZVN-9 NC19362, NC19372, NC19374, and NC19399. NC19399 was impressed by USAAF as UC-72L.


Fifteen AVN-8 were built, priced at $12,800; NC17, NC2276, NC2278, NC2273, NC19356, NC19361, NC19367/19370, NC19377/19378, NC19385, NC19387, and NC20904, of which 4 were impressed by USAAF as UC-72J.

A few were impressed by the USAAC during the Second World War as the UC-72J and UC-72L. One AVN-8 was used by the Royal Aircraft Establishment at Farnborough, Hampshire, for trials with tricycle landing gear.
1938 ATC 677
Engine: 1 × Jacobs L-6, 330 hp (246 kW)
Wingspan: 34 ft 9 in
Wing area: 246 sq.ft
Length: 27 ft 7 in
Height: 8 ft 6 in
Empty weight: 2,493 lb
Gross weight: 3,800 lb
Maximum speed: 161 mph
Cruise speed: 139-151 mph
Stall: 60 mph
Service ceiling: 14,200 ft
Rate of climb: 900 ft/min
Range: 550-600 mi
Crew: 1
Passengers: 3
15 built
6 built.
1937 (ATC 686)
Engine: Jacobs L-5, 285 hp (213 kW)
Wingspan: (upper) 34'9"
Wingspan (lower) 24'6"
Length: 26'8"
Useful load: 1249 lb
Max speed: 157 mph
Cruise speed: 140 mph
Stal: 55 mph
Range: 600 mi
Ceiling: 13,000'
Cost: $9,985
No built: 1, NC17731
Seats: 4
ZVN-8 / UC-72L
Engine: Jacobs L-5, 285 hp (213 kW)
1938 (ATC 686)
Wingspan: (upper) 34'9"
Wingspan (lower) 24'6"
Length: 27'7"
Useful load: 1200 lb
Cost: $10,695
No built: 5






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