LWD Zuch
{{Short description|1940s Polish light aircraft}}
{{Lead too short|date=July 2024}}
{{Infobox aircraft
|name =LWD Zuch
|image =File:LWD Zuch 2 - Muzeum Lotnictwa Kraków.jpg
|caption =
|type =Trainer/aerobatics aircraft
|manufacturer =Lotnicze Warsztaty Doświadczalne
|designer =
|first_flight = 1 September 1948
|introduction = 1949
|retired = 1963
|status =
|primary_user = Poland
|more_users =
|produced = 1948-1950
|number_built = 7
|unit cost =
|variants =
|developed_from=LWD Junak-1
}}
The Zuch was a Polish aerobatics and trainer aircraft, built in 1948 in the LWD bureau and produced in a small series.
Design and development
The aircraft was a development of a military and civilian trainer plane LWD Junak-1, meant as a civilian aerobatics and trainer plane for the Polish Aero Club. It was designed in the Lotnicze Warsztaty Doświadczalne (LWD - Aircraft Experimental Workshops), a main designer was Tadeusz Sołtyk. The design was similar to Junak-1, the main difference was en engine. Unlike Junak, its fixed landing gear, in massive covers, was lacking struts. It was also fitted with split flaps and had slightly enlarged rudder (similar improvements were later adapted in Junak-2).
=Description=
Mixed construction (steel and wood) low-wing monoplane, conventional in layout. Fuselage of a steel frame, covered with canvas, in front with metal sheet. Two-spar wings of wooden construction and trapezoid shape, canvas and plywood covered, fitted with split flaps. Cockpit with two seats in tandem, under a multi-part closed canopy. Conventional fixed landing gear with a tail wheel, main gear in massive covers. Engine in front: Zuch-1: 6-cylinder inline engine Walter Minor 6-III (118 kW / 160 hp), Zuch-2: 7-cylinder radial engine Bramo Sh 14 (118 kW / 160 hp) with a ring cover with individual cowls for cylinders. Two-blade wooden propeller.
The first variant Zuch-1 was powered by the Czechoslovak 160 hp Walter Minor 6-III inline engine in a long, slant nose. The prototype flew first on September 1, 1948. The design was quite successful and fit to aerobatics, but it did not enter production because of decision not to produce Walter Minor engines in Poland. The prototype served in aero clubs from 1950 until end of 1955, with markings SP-BAD.
The second prototype Zuch-2 was fitted with a radial engine Bramo Sh 14. It was flown on April 1, 1949 and carried markings SP-BAG. Because of increased drag, maximum speed was lower - 222 km/h comparing to 244 km/h of Zuch-1. Because there were several Sh 14 engines available, left in the country by retreating Germans, the LWD next built a short series of 5 Zuch-2s in 1950. They carried markings SP-BAL - SP-BAP and served in aero clubs until 1955, except SP-BAM, which served until 1963.
Operators
;{{POL}}
Survivors
;Zuch-1 (SP-BAD)
:Preserved in the Polish Aviation Museum in Kraków (damaged and disassembled).
;Zuch-2 (SP-BAM)
:Preserved in the Polish Aviation Museum in Kraków (disassembled).
;Zuch-2 (SP-BAO)
:Preserved in the Polish Aviation Museum in Kraków (incomplete and disassembled).
Specifications (Zuch 2)
{{Aircraft specs
|ref=Monografie: LWD Junak a Zuch{{sfn|Němeček|1974|p=105}}
|prime units?=met
|crew=2
|length m=7.61
|length note=
|span m=9.91
|span note=
|height m=2.10
|height note=
|wing area sqm=17.50
|wing area note=
|aspect ratio=
|airfoil=
|empty weight kg=638
|empty weight note=
|gross weight kg=1020
|gross weight note=
|max takeoff weight kg=
|max takeoff weight note=
|fuel capacity=
|more general=
|eng1 number=1
|eng1 name=Bramo Sh 14
|eng1 type=7-cylinder air-cooled radial piston engine
|eng1 hp=160
|eng1 note=
|prop blade number=2
|prop name=propeller
|prop dia m=
|prop dia note=
|max speed kmh=222
|max speed note=
|cruise speed kmh=181
|cruise speed note=
|stall speed kmh=
|stall speed note=
|never exceed speed kmh=
|never exceed speed note=
|range km=1160
|range note=
|combat range km=
|combat range note=
|ferry range km=
|ferry range note=
|endurance=
|ceiling m=4750
|ceiling note=
|g limits=
|roll rate=
|climb rate ms=3.65
|climb rate note=
|time to altitude=
|wing loading kg/m2=
|wing loading note=
|fuel consumption kg/km=
|power/mass=
|thrust/weight=
|more performance=
|avionics=
}}
See also
References
{{reflist}}
- Kempski, Benedykt, Samolot szkolno-treningowy Junak, Typy Broni i Uzbrojenia #110, Wydawnictwo MON, Warsaw 1986, {{ISBN|83-11-07341-4}} {{in lang|pl}}
- {{cite magazine |last=Němeček |first=Václav |title=Monografie: LWD Junak a Zuch |magazine=Letectví a Kosmonautika |year=1974 |issue=3 |pages=104–106 |language=cs}}
External links
{{Commons category}}
- [http://www.airwar.ru/enc/la/zuch.html Photos at Ugolok Neba site]
{{LWD aircraft}}
Category:1940s Polish civil trainer aircraft