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.
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.[2]
The 1934 model YMF was substantially redesigned with a longer and wider fuselage, larger rudder and other structural changes, and put into production in March 1986 by WACO Classic Aircraft of Lansing, Michigan as the YMF-5.[1] Over 150 YMF-5s were completed as of 2017 with new examples being built to specific orders.[3][failed verification]
The WACO Aircraft Company of Ohio Inc had built three replicas by December 2011, which they designated MF.[4]
Considerable numbers of 'F' series biplanes, both original and newly built, remain in service.
Variantsedit
Listed in approximate chronological order (per Simpson, 2001, p. 573) First letter of designation refers to engine installed. From 1936 Waco added year suffixes to designations—e.g. YPF-6, YPF-7, with the numeral being the last digit of the model year.
INF
125 hp (93 kW) Kinner B-5, certified ATC# 345 on 2 August 1930.
KNF
100 hp (75 kW) Kinner K-5, certified ATC# 313 on 12 April 1930.
RNF
110 hp (82 kW) Warner Scarab, certified ATC# 311 on 7 April 1930.[5]
PCF
170 hp (130 kW) Jacobs LA-1 and new cross-braced undercarriage, PCF-2 certified ATC# 473 on 2 October 1931
PBF
as PCF with 'B' wings
QCF
165 hp (123 kW) Continental A70, QCF-2 certified ATC# 416 on 9 April 1931
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.[10]
Green, William; Pollinger, Gerald (1965). The Aircraft of the World (3rd ed.). Macdonald & Co. (Publishers) Ltd.
Simpson, Rod (2001). Airlife's World Aircraft. Airlife Publishing. ISBN1-84037-115-3.
Sloot, Emile; Hornstra, Luc (January 1999). "Fueza Aerea Guatamalteca". Air International. Vol. 56, no. 1. pp. 55–58.
Swanborough, F. G.; Bowers, Peter M. (1963). United States Military Aircraft since 1909. London: Putnam.
Swanborough, Gordon; Bowers, Peter M. (1976). United States Navy Aircraft since 1911 (Second ed.). London: Putnam. ISBN0-370-10054-9.
External linksedit
Media related to Waco F Series at Wikimedia Commons
January 01, 1970
waco, series, series, american, built, general, aviation, military, biplane, trainers, 1930s, from, waco, aircraft, company, civilian, pilot, training, program, 1941, waco, role, open, cockpit, biplane, national, origin, united, states, manufacturer, waco, air. The Waco F series is a series of American built general aviation and military biplane trainers of the 1930s from the Waco Aircraft Company Waco F series ex US Civilian Pilot Training Program 1941 Waco UPF 7 Role open cockpit biplane National origin United States Manufacturer Waco Aircraft Company Introduction 1930 Status YMF 5 in production 2013 Primary user private pilot owners and training schools Contents 1 Development 2 Operational history 3 Variants 3 1 Waco Classic Aircraft replicas 3 2 Military designations 4 Operators 4 1 Military operators 5 Specifications UPF 7 6 References 7 External linksDevelopment editThe 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 edit nbsp Waco RNF of 1931 displayed at the Pima Air Museum Tucson Arizona in 1991 nbsp Waco UBF of 1932 flown by Texaco preserved at the Historic Aircraft Restoration Museum Missouri 2006 nbsp Waco ZPF 6 three seat executive aircraft built for Texaco Oil in 1936 Preserved airworthy at Sebring Florida nbsp UPF 7 built 1941 arrives at the 2014 Royal International Air Tattoo England nbsp A new 2006 model WACO Classic Aircraft YMF F5C at Sun n Fun 2006 nbsp Waco YPF at Sun n Fun 2006 nbsp 1997 YMF 5C at Hancock County Bar Harbor Airport Maine 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 2 The 1934 model YMF was substantially redesigned with a longer and wider fuselage larger rudder and other structural changes and put into production in March 1986 by WACO Classic Aircraft of Lansing Michigan as the YMF 5 1 Over 150 YMF 5s were completed as of 2017 with new examples being built to specific orders 3 failed verification The WACO Aircraft Company of Ohio Inc had built three replicas by December 2011 which they designated MF 4 Considerable numbers of F series biplanes both original and newly built remain in service Variants editListed in approximate chronological order per Simpson 2001 p 573 First letter of designation refers to engine installed From 1936 Waco added year suffixes to designations e g YPF 6 YPF 7 with the numeral being the last digit of the model year INF 125 hp 93 kW Kinner B 5 certified ATC 345 on 2 August 1930 KNF 100 hp 75 kW Kinner K 5 certified ATC 313 on 12 April 1930 RNF 110 hp 82 kW Warner Scarab certified ATC 311 on 7 April 1930 5 PCF 170 hp 130 kW Jacobs LA 1 and new cross braced undercarriage PCF 2 certified ATC 473 on 2 October 1931 PBF as PCF with B wings QCF 165 hp 123 kW Continental A70 QCF 2 certified ATC 416 on 9 April 1931 UBF 210 hp 160 kW Continental R 670 UMF 210 hp 160 kW Continental R 670A and longer and wider fuselage and larger fin YMF 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 trainer with wide track undercarriage and 220 hp 160 kW Continental R 670 designated PT 14 by the USAAC Waco Classic Aircraft replicas edit YMF 5 1986 design roughly based on the YMF built by WACO Classic Aircraft YMF 5D 2009 improved YMF 5 3 6 YMF 5F YMF 5 with Aerocet 3400 amphibious floats 7 Military designations edit JW 1 Two UBF designated XJW 1 were used by the US Navy as hook trainers for the skyhook airship parasite aircraft program 8 PT 14 USAAC USAAF designation for UPF 7Operators editMilitary operators edit nbsp Guatemala Guatemalan Air Force At least 1 Waco YMF 7 received in 1934 Was still in airworthy condition in 1998 9 nbsp United States 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 10 United States Navy 11 Specifications UPF 7 editData from The Aircraft of the World 2 General characteristicsCrew 1 Capacity 1 trainee or passenger Length 23 ft 1 in 7 04 m Wingspan 30 ft 0 in 9 14 m Height 8 ft 5 in 2 57 m Wing area 244 sq ft 22 7 m2 Empty weight 1 870 lb 848 kg Gross weight 2 650 lb 1 202 kg Powerplant 1 Continental W 670 6A seven cylinder radial 220 hp 160 kW Performance Maximum speed 128 mph 206 km h 111 kn Cruise speed 114 mph 183 km h 99 kn Range 400 mi 640 km 350 nmi Service ceiling 14 800 ft 4 500 m Time to altitude 15 min to 9 000 ft 2 700 m References editNotes a b Simpson 2001 p 573 a b Green amp Pollinger 1965 p 307 a b WACO Classic Aircraft 2009 Own the Dream Archived from the original on 2012 03 11 Retrieved 2009 06 12 Vandermeullen Richard 2012 Kit Aircraft Buyer s Guide Kitplanes Volume 28 Number 12 December 2011 page 76 Belvoir Publications ISSN 0891 1851 Al Hansen Spring 2004 The Waco Model F AAHS Journal Grady Mary June 2009 Waco Updates Its Classic Biplane Retrieved 2009 06 25 WACO Aircraft Corporation 2021 YMF 5 wacoaircraft com Archived from the original on 15 December 2021 Retrieved 18 February 2022 Waco Aerofiles com Retrieved 2012 08 23 Sloot and Hornstra Air International January 1999 pp 55 57 Swanborough and Bowers 1963 p 535 Swanborough and Bowers 1976 p 474 Bibliography Green William Pollinger Gerald 1965 The Aircraft of the World 3rd ed Macdonald amp Co Publishers Ltd Simpson Rod 2001 Airlife s World Aircraft Airlife Publishing ISBN 1 84037 115 3 Sloot Emile Hornstra Luc January 1999 Fueza Aerea Guatamalteca Air International Vol 56 no 1 pp 55 58 Swanborough F G Bowers Peter M 1963 United States Military Aircraft since 1909 London Putnam Swanborough Gordon Bowers Peter M 1976 United States Navy Aircraft since 1911 Second ed London Putnam ISBN 0 370 10054 9 External links edit nbsp Media related to Waco F Series at Wikimedia Commons Retrieved from https en wikipedia org w index php title Waco F series amp oldid 1215388088, wikipedia, wiki, book, books, library,
