Waco F series
| Waco F series | |
|---|---|
| |
| Waco UPF-7 built 1941 ex US Civilian Pilot Training Program at Sun n' Fun, Lakeland, Florida, in April 2009 | |
| Role | open-cockpit biplane |
| National origin | United States |
| Manufacturer | Waco Aircraft Company |
| Introduction | 1930 |
| Status | YMF-5 in production |
| Primary user | private pilot owners and training schools |
The Waco F series was a range of American-built private pilot owner and training biplanes of the 1930s from the Waco Aircraft Company.
Development
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.[1]
The initial models were the INF (125 hp (93 kW) Kinner engine), KNF (100 hp (75 kW) Kinner) and the RNF (110 hp (82 kW) Warner Scarab), 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.
Operational history
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 version was adopted by the Civilian Pilot Training Program and continued to be built in numbers (over 600) until 1942.[2]
The YMF of 1934, which had a modified wider and longer fuselage, was returned to production in March 1986 by WACO Classic Aircraft of Lansing Michigan as the YMF-5.[3] Over 100 YMF-5s have been completed by WACO Classic Aircraft and the type remained in low-rate production to customer order in 2012.[4]
Considerable numbers of 'F' series biplanes, both original and newly built, remained in service in mid-2009.
Variants (in approximate chronological order)
(per Simpson, 2001, p. 573)
- INF
- 125 hp (93 kW) Kinner B-5
- KNF
- 100 hp (75 kW) Kinner K-5
- RNF
- 110 hp (82 kW) Warner Scarab
- PCF
- 170 hp (127 kW) Jacobs LA-1 and new cross-braced undercarriage
- PBF
- as PCF with modified 'B' wings
- QCF
- 165 hp (123 kW) Continental A70
- UBF
- 210 hp (157 kW) Continental R-670
- UMF
- 210 hp (157 kW) Continental R-670A and longer wider fuselage and larger vertical fin
- YMF
- as UMF with 225 hp (168 kW) Jacobs L-4
- YPF-6 and YPF-7
- 225 hp (168 kW) Jacobs L-4
- ZPF-6 and ZPF-7
- 285 hp (213 kW) Jacobs L-5
- UPF-7
- tandem training version with wider-track undercarriage and 220 hp (164 kW) Continental radial (designated PT-14 by the USAAC)
- YMF-5
- built by WACO Classic Aircraft from March 1986 onwards. In June 2009 the company unveiled the latest updated variant, the YMF-5D[4][5]
- JW
- Two UBF designated XJW-1 were used by the US Navy as hook-up trainers for the Curtiss F9C Sparrowhawk airship borne fighters.[6]
Note: from 1936 Waco added year suffixes to designations—e.g. YPF-6, YPF-7, with the numeral being the last figure of the year of manufacture
Specifications (UPF-7)
Data from Green, 1965, p. 307
General characteristics
- Crew: 1
- Capacity: 1 trainee or passenger
Performance
References
- Notes
- ^ Simpson, 2001, p. 573
- ^ Green, 1965, p. 307
- ^ Simpson, 2001, p. 573
- ^ a b WACO Classic Aircraft (2009). "Own the Dream". Retrieved 2009-06-12.
- ^ Grady, Mary (2009). "Waco Updates Its Classic Biplane". Retrieved 2009-06-25.
{{cite web}}: Unknown parameter|month=ignored (help) - ^ "Waco". Aerofiles.com. Retrieved 2012-08-23.
- Bibliography