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Waco F series / INF / KNF / MNF / RNF / PCF / PBF / QCF / UBF / UMF / UPF-7 / PT-14 / YMF / YPF / ZK-7 / ZPF / XJW-1 / QNF / CPF / DPF / EPF / VPF 
The Waco 'F' series of biplanes supplanted and then replaced the earlier 'O' series of 1927/33. The 'F' series had an airframe which was smaller and about 450 pounds (200 kg) lighter than the 'O' series, while continuing to provide accommodation for three persons in tandem open cockpits. A similar performance to the earlier model was obtained on the power of smaller and more economical engines.
The initial models were the INF (125 hp / 93 kW Kinner engine) with around 50 built, KNF (100 hp / 75 kW Kinner, about 20 built) and the RNF (110 hp / 82 kW Warner Scarab, nearly 150 built), all of which had externally braced tailwheel undercarriages. Many further sub-models followed with more powerful engines of up to 225 hp / 168 kW. The most powerful in the range was the ZPF of 1936/37, intended for executive use.
Only four MNF's were built, i.e. NC11213, NC11222, NC11239 and NC11246.
Al Menasco used the MNF to help promote his engines. A Heywood air-operated starter, caster action tail wheel, compass, navigation lights, first-aid kit and fire extinguisher were standard equipment on the MNF. NC11213 has the optional, Hamilton Standard ground adjustable prop. Brakes were optional.


The first QCF was finished on May 12, 1931. Thirty-one were built in 1932.
The 'F' series was popular with private owner pilots for sporting and other uses and continued in production through the late 1930s. The tandem cockpit UPF-7 was adopted by the Civilian Pilot Training Program and continued in production until 1942 by which time over 600 had been built.
One EPF-6 was built in 1936 and test-flown. No production was undertaken.
Waco XJW-1 9522
Two, 9521/9522, XJW-1 of 1934 were a USN version of the UBF as hook-up trainer and mail shuttle for the dirigible Macon.
Waco XJW-1 9522
In 1937 Waco introduced its Model UPF-7 as an open-cockpit biplane with a 164-kW (220-hp) Continental W-670-K radial engine and seating for two or three. The type was intended for training and sport use. A single example was evaluated by the USAAC as a primary trainer during 1939 with the designation XPT-14. Then followed 13 YPT-14 service trials aircraft, which were later redesignated PT-14; a single civil Model UPF-7 was impressed with the designation PT-14A. However, another 600 aircraft of the same basic type were ordered with three engine types for the Civilian Pilot Training Program that undertook pilot training at educational institutions to provide a pool of trained pilots in the event of war. Another 31 similar aircraft were bought by the Civil Aeronautics Authority for its own flying unit.
Waco UPF-7 1941
The three place YPF-6 and YPF-7 OF 1935 (ATC 586) featured a sliding canopy and unit price of $8,395. Five were built as YPF-6 (NC15700, NC15606, NC15711, NC16579, NC17470) and three re-designated in 1937 as YPF-7 (NC17710, NC17715, NC20907).
Waco YPF-6 NC16579

Waco YPF-7


Three ZPF-6 (ATC 586) were built in 1936, NC15707, NC16579, and NC17470, featuring a sliding canopy. The price was $7,385.
Two ZPF-7 were built in 1938, NC17710 and NC17715.
Waco ZPF-7 N29962


Approximately 600 came out of the Troy, Ohio factory between 1937 and 1942.
The WACO Aircraft Company of Ohio Inc had built three replicas by December 2011, which they designated MF.
The Guatemalan Air Force received at least 1 Waco YMF-7 in 1934, which was still in airworthy condition in 1998.
The United States Army Air Corps adopted the UPF-7 as the PT-14, with one XPT-14 and 13 YPT-14s being purchased, with an additional UPF-7 impressed in 1942 as a PT-14A. Some were operated by the United States Navy.
Waco CPF of Brazilian navy


One QNF model was built. It flew, but presented nose-heaviness problems.


One EPF-6 was built in 1936 and test-flown. No production was undertaken.


Considerable numbers of 'F' series biplanes, both original and newly built, remained in service in mid-2009.
1935 (ATC 583)
Engine: Wright R-760, 250hp (186 kW)
Wingspan: 30'0"
Length: 23'2"
Usefull load: 925 lb
Max speed: 150 mph
Cruise speed: 135 mph
Stall: 48 mph
Range: 400 mi
Price: $8,775.
Seats: 2-3
redesignated DPF
Engine: Wright Cyclone, 250hp
Useful load: 965 lb
Price: $8,000
redesignated DPF


Engine: Wright R-760, 285 hp (213 kW)
Was CPF-6
Engine: Wright R-760, 285 hp (213 kW)
Seats: 3
Was CPF-7
Engine: Wright R-760, 320 hp (239 kW)
Seats: 3
1 built
Certified ATC#345 2 August 1930
Engine: Kinner B-5, 125 hp (93 kW)
Span: 29 ft 7 in (9.1 m)
Length: 20 ft 10 in (7 m)
Height: 8 ft 5 in (2.5 m)
Wing area: 244 sq ft (22.7 sq m)
Empty weight: 1870 lb (848 kg)
Loaded weight: 2650 lb (1202 kg)
Maximum speed: 128 mph (206 km/h)
Cruise speed: 96 mph
Stall: 40 mph
Range: 370 mi
Seats: 3
Price: $4,110
50 built
Certified ATC#313 12 April 1930
Engine: Kinner K-5, 100 hp (75 kW)
20 built
Engine: Menasco C-4 Pirate, 125 hp / 93 kW
Wing span: nearly 30'
Gross weight: 1900 lb
Cruise: 100 mph
Stall: 35 mph
4 built
Engine: Continental A-70, 165 hp / 123 kW
Max speed: 119 mph
Cruise speed: 104 mph
Seats: 3

1 built


Certified ATC#311 7 April 1930
Engine: Warner Scarab, 110 hp (82 kW)
177 built
1931 RNF
Engine: Jacobs LA-1, 170 hp (127 kW)
as PCF with modified 'B' wings
4 built
Engine: Jacobs LA-1, 170 hp (127 kW)
3 built
Certified ATC#473 2 October 1931
Engine: Jacobs LA-1, 170 hp (127 kW)
new cross-braced undercarriage
QCF-2 Certified ATC#416 9 April 1931
Engine: Continental A70, 165 hp (123 kW)
Wingspan: 29'7"
Length: 20'4"
Useful load: 864 lb
Top speed: 125 mph
Cruise: 108mph
Stall: 45 mph
Range: 430 mi
Seats: 3
31 built

Prototype NC11241


UBF / UBF-2 / XJW-1
Engine: Continental R-670, 210 hp (157 kW)
Cruise: 120 mph
Two UBF designated XJW-1 were used by the US Navy as hook-up trainers for the Curtiss F9C Sparrowhawk airship-borne fighters.
Around 11 built
1932 UBF
UMF / UMF-3 / UMF-5
Engine: Continental R-670A, 210 hp (157 kW)
longer wider fuselage and larger vertical fin
18 built
18 built -3 & -5
as UMF
Engine: Jacobs L-4, 225 hp (168 kW)
Engine: Jacobs L-4, 245 hp (183 kW)
YPF-6 / YPF-7
Engine: Jacobs L-4, 225 hp (168 kW)
Wingspan: 30'0"
Length: 23'4"
Useful load: 975 lb
Max speed: 150 mph
Cruise speed: 135 mph
Stall: 50 mph
Range: 405 mi

8 built


Engine: Jacobs L-5, 285 hp (213 kW)
Wingspan: 30'0"
Length: 23'7"
Useful load: 952 lb
Max speed: 156 mph
Cruise speed: 142 mph
Stall: 52 mph
Range: 420 mi
Seats: 2-3
1936 ZPF-6
Engine: Jacobs L-5, 285 hp (213 kW)
Wingspan: 30'0"
Length: 23'6"
Seats: 3


Engine: Continental R-670, 210 hp (157 kW)
Prototype for UPF-7
UPF-7 / PT-14
tandem training version with wider-track undercarriage (USAAC)
Engine: l x Continental R-670-3 or W-670-6A, 164kW (220 hp)
Wingspan: 30 ft 0 in (9.14 m)
Wing area: 244 ft2 (22.67 m2)
Length: 23 ft 1 in (7.04 m)
Height: 8 ft 5 in (2.57 m)
Max TO weight: 2,650 lb (1202.02 kg)
Empty weight: 1,870 lb (848.22 kg)
Maximum speed: 128 mph (207 km/h)
Cruise speed: 114 mph (185 km/h)
Range: 400 miles (644 km)
Service ceiling: 14,800 ft (4,511 m)
Armament: none
Crew: 1
Capacity: 1 trainee or passenger
14 became YPT-14 trainers
over 600 built
VPF-6 / Waco VPF-7
Engine: Continental W-670, 240 hp (179 kW)
6 built.

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