“Toczołowski-Wułw TW-12”的意思、由来-开放百科全书

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Toczołowski-Wułw TW-12

释义

Design and development
Operational history
Specifications (two seat version)
References

name=TW-12

image=

caption=

}}{{Infobox Aircraft Type

type=Club trainer aircraft

national origin=Poland

manufacturer=

designer=Henryk Toczołowski and Józef Wulf

first flight=29 September or November 1933

introduced=

retired=

status=

primary user=

more users=

produced=

number built=1

program cost=

unit cost=

developed from=

variants with their own articles=
}}

The Toczołowski-Wułw TW-12 was a one-off, two-seat, single-engined club trainer, though certification difficulties delayed its use until 1935 and then only as a single-seater.

Design and development

Henryk Toczołowski and Józef Wulf designed the TW-12 in 1929-30 but had to build the structure slowly in their spare time. They were both members of the P.W.S. Aero Club and eventually got permission to use the P.W.S. workshops but the TW-12 was not ready for flight until the second half of 1933.^[2] There is uncertainty about the date of the first flight, which one source^[2] gives as 29 September 1933 and another as 29 November 1933.

The TW-12 was an all-wood aircraft, with a cantilever, one piece low wing which was trapezoidal in plan. It was built around twin spars and covered in a mixture of plywood and fabric.^[2]

It was powered by a {{convert|80-88|hp|kW|abbr=on|order=flip}} five cylinder Armstrong-Siddeley Genet radial engine. The fuselage, with rectangular section structure and rounded decking, was plywood covered. The TW-12 had two open, tandem cockpits fitted with dual control. Its landing gear was fixed and conventional.

Early flight testing revealed some handling problems, particularly at low speeds in the landing approach. After some modifications the TW-12 went to the I.B.T.L. at Warsaw for official airworthiness tests , which led again to concerns about the low speed handling and also about the low fuel capacity ({{convert|8.8|Impgal|l USgal|abbr=on}}). In the summer of 1935 the TW-12 was allowed to fly as a single-seater, with the forward cockpit covered over and with a rudder of increased area.^[2]

Operational history

On its release from the I.B.T.L., the WT-12 was scheduled to take part in the P.W.S. Club rally on 28 July 1935 at their home base at Biała Podlaska. According to one account, Antoni Uszacki decided to take advantage of a strong tail wind to fly it from Warsaw to Lviv, some {{convert|370|km|mi||abbr=on}} away. Despite the limited fuel capacity ({{convert|40|l|Impgal USgal|abbr=on}}, he arrived safely though with a dry tank .The club began to use the TW-12 as a trainer but its career was soon cut short by a landing crash with Tadeusz Arcinowski at the controls.

Another account states that Uszacki flew it at the rally but only achieved last (6th) place, and that Arcinowski flew it soon afterwards from Warsaw to Lviv but crashed on landing.^[2]

Specifications (two seat version)

{{Aircraft specs
|ref=J. Cynk, 1971 except where noted
|prime units?=met

|genhide=
|crew=One pilot
|capacity=One pupil
|length m=6.5
|length note=
|span m=10.5
|span note=
|height m=2.2
|height note=^[2]
|wing area sqm=14.5
|wing area note=
|aspect ratio=
|airfoil=
|empty weight kg=285
|empty weight note=
|gross weight kg=
|gross weight lb=
|gross weight note=
|max takeoff weight kg=500
|max takeoff weight note=
|fuel capacity={{convert|8.8|Impgal|l USgal|abbr=on}}
|more general=

Landing speed: {{convert|70|km/h|mph|abbr=on}}

}}

References

1. ^¹²³⁴⁵⁶⁷⁸⁹{{cite web |url=http://www.samolotypolskie.pl/samoloty/2999/126/TW-122 |title= TW-12, 1933 |work=Samolotypolskie.pl |publisher= |accessdate=28 March 2018}}

^[1]
}}

2 : Single-engined tractor aircraft|Polish civil aircraft 1930–1939

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