Triumph Twenty One: Difference between revisions
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{{short description|British motorcycle}} |
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{{Use dmy dates|date=August 2017}} |
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{{Use British English|date=August 2017}} |
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{{Infobox Motorcycle |
{{Infobox Motorcycle |
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|name = Triumph Twenty One |
|name = Triumph Twenty One |
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|image = [[ |
|image = [[File:1958 Triumph Twenty One 01.jpg|frameless|upright=1.35]] |
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|aka = T21, Twenty One, 'Bathtub' |
|aka = T21, Twenty One, 'Bathtub' |
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|manufacturer = |
|manufacturer = [[Triumph Engineering Co Ltd]] |
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|parent_company = |
|parent_company = |
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|production = 1957–1966 |
|production = 1957–1966 |
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|predecessor = |
|predecessor = |
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|successor = |
|successor = |
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|class = |
|class = [[Types of motorcycles#Standard|Standard]] |
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|engine = 349 |
|engine = {{convert|349|cc|abbr=on}}, [[Air-cooled engine|air-cooled]], [[Four-stroke engine|four-stroke]], [[Straight-twin engine|twin]] |
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|top_speed = |
|top_speed = |
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|power = |
|power = |
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|torque = |
|torque = |
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|transmission = |
|transmission = Four-speed, chain final drive |
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|suspension = |
|suspension = |
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|brakes = |
|brakes = |
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The '''Triumph Twenty One ''' (also known as the '''3TA''') |
The '''Triumph Twenty One ''' (also known as the '''3TA''') is a [[Types of motorcycles#Standard|standard]] [[motorcycle]] made by [[Triumph Engineering Co Ltd]] in [[Coventry]]. The ''Model Twenty One'' was the first of the Triumph [[unit construction]] twin cylinder motorcycles. Rebranded as the Triumph 3TA in 1959 it continued in production until 1966 when it was survived by the [[Triumph T90]], its sports version.<ref name="auction">{{cite web|url=http://www.british-car-auctions.co.uk/default.aspx?page=3597|title=Triumph 3TA|accessdate=2009-04-14}}</ref> |
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==Development== |
==Development== |
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Launched in 1957 the ''Model Twenty One'' was the first of the Triumph [[unit construction]] twin cylinder motorcycles from the [[Meriden]] factory. With a capacity of 349 cc, the engine was a classic [[Edward Turner]] design with a 360 degree crankshaft, twin gear driven camshafts and twin plunger oil pump. The cylinder block was cast iron with an alloy head and separate rocker boxes. |
Launched in 1957 the ''Model Twenty One'' was the first of the Triumph [[unit construction]] twin cylinder motorcycles from the [[Meriden, West Midlands|Meriden]] factory. With a capacity of 349 cc, the engine was a classic [[Edward Turner (motorcycle designer)|Edward Turner]] design with a 360 degree crankshaft, twin gear driven camshafts and twin plunger oil pump. The cylinder block was cast iron with an alloy head and separate rocker boxes. The engine was dry sump lubrication and there was a single [[Amal Monobloc]] carburettor. Drive was by a conventional four speed gearbox, with a right foot gear lever.<ref name="60's">{{cite book|last=Bacon|first=Roy|title=British Motorcycles of the 60's|publisher=Osprey Publishing|year=1988|isbn=978-1-85648-166-3}}</ref> |
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[[File:Triumph Twenty One - Flickr - mick - Lumix(1).jpg|thumb|Triumph 'Twenty One' with the abbreviated 'bikini' version of the 'bathtub' rear fairing]] |
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There are two explanations for the ''''Twenty One'''' name spelt out in full on the side panels. The first explanation is that it celebrates the twenty-first anniversary of [[Triumph Engineering Co Ltd]]. The second explanation is that the important US export market rated motorcycle [[engine displacement]] in cubic inches and 21 cubic inches equates to 350 cc.<ref name="classicglory" /> |
There are two explanations for the ''''Twenty One'''' name spelt out in full on the side panels. The first explanation is that it celebrates the twenty-first anniversary of [[Triumph Engineering Co Ltd]]. The second explanation is that the important US export market rated motorcycle [[engine displacement]] in cubic inches and 21 cubic inches equates to 350 cc.<ref name="classicglory" /> |
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[[File:Triumph motorcycle at Overloon.JPG|thumb|One of the last versions: a 1966 Dutch Army Triumph 3TA 'Twenty One', now on display at the Marshallmuseum, Overloon.]] |
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[[ |
[[File:Triumph Tiger 90.jpg|thumb|upright|left|1965 350cc Triumph T90 Tiger. Built from 1962-68, this was the sports version of the Triumph Twenty One]] |
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In 1959 the Twenty One was rebranded the '''Triumph 3TA''' and also produced as a 500 cc version, the Triumph 5TA, which was also referred to as the 'new Speed Twin'. The 'A' designation was a reference to the fact that both motorcycles were fitted with an alternator as standard, as the pre-unit models had been fitted with a Dynamo. The original versions of both the 350 cc and 500 cc models had the fully enclosed rear end which was fashionable in the late |
In 1959 the Twenty One was rebranded the '''Triumph 3TA''' and also produced as a 500 cc version, the Triumph 5TA, which was also referred to as the 'new Speed Twin'. The 'A' designation was a reference to the fact that both motorcycles were fitted with an alternator as standard, as the pre-unit models had been fitted with a Dynamo. The original versions of both the 350 cc and 500 cc models had the fully enclosed rear end which was fashionable in the late 1950s.<ref name="classicglory">{{cite web|url=http://www.classicglory.com/triumphc/|title=A Brief History of Triumph 'C' Range Motorcycles|accessdate=2009-04-01}}</ref> It was not popular with American customers, where the extra weather protection was less important however, and it got called the '[[bathtub]]'. They also found that the extra sheet metal made access for servicing more complicated.<ref name="Remus">{{cite book|last=Remus|first=Tim|title=Triumph Motorcycles: Twins and Triples|publisher=MBI Publishing Company|year=1997|isbn=978-0-7603-0312-2}}</ref> Only the final 3TA model for 1966 dispensed entirely with the rear fairing. |
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[[File:Triumph Tiger 90 i.jpg|thumb|After a single season, the 1964 350cc Triumph T90 Tiger dispensed with the unpopular 'semi-bathtub' or 'bikini' rear fairing still to be found upon the 3TA.]] |
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The 3TA and the 5TA both continued in production until 1966 when were |
The 3TA and the 5TA both continued in production until 1966 when they were survived by their sportier versions, the T90 and [[Triumph Tiger 100|T100]] respectively.<ref name="auction"/> |
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{{clear}} |
{{clear}} |
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==See also== |
==See also== |
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* [[List of Triumph motorcycles]] |
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* [[Triumph Engineering Co Ltd]] |
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==References== |
==References== |
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{{Commons category}} |
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{{reflist}} |
{{reflist}} |
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{{Triumph motorcycles Meriden}} |
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==External links== |
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* [http://www.motorbike-search-engine.co.uk/classic_bikes/triumph-3t-gallery.php Triumph 3T/3TA Bathtub Gallery] |
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[[Category: |
[[Category:Triumph Engineering motorcycles|Twenty One]] |
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[[Category: |
[[Category:Motorcycles powered by straight-twin engines]] |
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Latest revision as of 07:17, 30 April 2021
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| Manufacturer | Triumph Engineering Co Ltd |
|---|---|
| Also called | T21, Twenty One, 'Bathtub' |
| Production | 1957–1966 |
| Class | Standard |
| Engine | 349 cc (21.3 cu in), air-cooled, four-stroke, twin |
| Transmission | Four-speed, chain final drive |
The Triumph Twenty One (also known as the 3TA) is a standard motorcycle made by Triumph Engineering Co Ltd in Coventry. The Model Twenty One was the first of the Triumph unit construction twin cylinder motorcycles. Rebranded as the Triumph 3TA in 1959 it continued in production until 1966 when it was survived by the Triumph T90, its sports version.[1]
Development[edit]
Launched in 1957 the Model Twenty One was the first of the Triumph unit construction twin cylinder motorcycles from the Meriden factory. With a capacity of 349 cc, the engine was a classic Edward Turner design with a 360 degree crankshaft, twin gear driven camshafts and twin plunger oil pump. The cylinder block was cast iron with an alloy head and separate rocker boxes. The engine was dry sump lubrication and there was a single Amal Monobloc carburettor. Drive was by a conventional four speed gearbox, with a right foot gear lever.[2]
.jpg)
There are two explanations for the 'Twenty One' name spelt out in full on the side panels. The first explanation is that it celebrates the twenty-first anniversary of Triumph Engineering Co Ltd. The second explanation is that the important US export market rated motorcycle engine displacement in cubic inches and 21 cubic inches equates to 350 cc.[3]
In 1959 the Twenty One was rebranded the Triumph 3TA and also produced as a 500 cc version, the Triumph 5TA, which was also referred to as the 'new Speed Twin'. The 'A' designation was a reference to the fact that both motorcycles were fitted with an alternator as standard, as the pre-unit models had been fitted with a Dynamo. The original versions of both the 350 cc and 500 cc models had the fully enclosed rear end which was fashionable in the late 1950s.[3] It was not popular with American customers, where the extra weather protection was less important however, and it got called the 'bathtub'. They also found that the extra sheet metal made access for servicing more complicated.[4] Only the final 3TA model for 1966 dispensed entirely with the rear fairing.
The 3TA and the 5TA both continued in production until 1966 when they were survived by their sportier versions, the T90 and T100 respectively.[1]
See also[edit]
References[edit]
Wikimedia Commons has media related to Triumph Twenty One.
- ^ a b "Triumph 3TA". Retrieved 14 April 2009.
- ^ Bacon, Roy (1988). British Motorcycles of the 60's. Osprey Publishing. ISBN 978-1-85648-166-3.
- ^ a b "A Brief History of Triumph 'C' Range Motorcycles". Retrieved 1 April 2009.
- ^ Remus, Tim (1997). Triumph Motorcycles: Twins and Triples. MBI Publishing Company. ISBN 978-0-7603-0312-2.