| 词条 | BSA Road Rocket |
| 释义 |
|name=BSA A10 Road Rocket |image= |aka= |manufacturer=BSA |parent_company= |production= 1954-1958 | assembly = Small Heath, Birmingham, UK |predecessor= |successor=BSA Super Rocket |class= |engine=646 cc air cooled twin | bore_stroke = {{convert|70|x|84|mm|abbr=on}} | ignition = Magneto | frame = | suspension = Telescopic fork (front), swinging arm (rear) | brakes = Drum |wheelbase={{cvt|54.75|in}} |length={{cvt|84|in}} |width= |height= |seat_height= |power= {{convert|40|bhp|abbr=on}} @ 6,000rpm[2] |torque= |dry_weight={{convert|418|lb|kg}}[1] |fuel_capacity={{convert|3.5|impgal|L|abbr=on}} |fuel_consumption={{convert|42|mpgus|mpgimp L/100 km|abbr=on|order=out}}[1] |transmission=Four speed, chain drive }} The BSA Road Rocket was a 1950s {{Convert|646|cc|abbr=on}} air-cooled parallel twin motorcycle designed by Bert Hopwood and produced by Birmingham Small Arms Company (BSA) at Small Heath, Birmingham. Developed from the A10 Golden Flash it was the first sports bike in the BSA A10 series. The A10 had a reputation for reliability but was struggling to compete against the Triumph engines and the Norton Featherbed frames.[2] Advertised by BSA in 1954 as 'undoubtedly the worlds greatest motorcycle'[3] the Road Rocket was discontinued in 1958 when it was replaced by the BSA Super Rocket.[4] DevelopmentLaunched as the top of BSA's range in 1954 the BSA Road Rocket was the first A10 engine with an alloy cylinder head.[2] Unlike the Golden Flash, the inlet manifold was separate to the cylinder head[5] enabling twin carburettors to be fitted if required.[4] It had a single Amal TT carburettor standard.[6] New "thick flange" cylinders were introduced and thee bottom flange was increased from {{cvt|3/8|to|1/2|in}} for improved rigidity and reliability.[5] The big end size was increased from 1.48" to 1.68".[7] It had high compression pistons and a higher lift camshaft with the 356 "sports" profile.[8] These engine modifications raised the power output to {{convert|40|bhp|abbr=on}}[9] and a top speed of {{convert|109|mph|abbr=on}}.[10] The model was launched with chrome mudguards and stays and a half-chrome petrol tank. A tachometer was an optional extra.[10] In 1957 an improved clutch was introduced, using 4 springs instead of six[11] and improved friction material.[12] See also
References1. ^1 {{cite web |title=BSA Road Rocket |url=http://www.motorcyclespecs.co.za/model/BSA/BSA%20Road%20Rocket.htm |website=MCS |accessdate=10 July 2018}} 2. ^{{Cite news | title = BSA Golden Flash on test | newspaper = Classic Bike Guide | date = May 2008 }} 3. ^{{cite web|url=http://www.cybermotorcycle.com/gallery/bsa_1956/BSA_1956_Brochure_A10_Road_Rocket.htm|title=BSA Sales Brochure|accessdate=2009-01-17}} 4. ^1 {{cite web|url=http://beezanet.com/twincarb/history.htm|title=BSA Twins|accessdate=2009-01-17}} 5. ^1 {{cite web |title=Pre-Unit A Group |url=https://www.draganfly.co.uk/index.php/a65anda50/category/859-pre-unit-a-group |website=www.draganfly.co.uk |accessdate=7 July 2018 |language=en-gb}} 6. ^{{cite web |title=Carburettor Settings – B.S.A |url=https://www.draganfly.co.uk/data/pdf/Carb%20settings.pdf |website=Draganfly Motorcycles |accessdate=7 July 2018}} 7. ^{{cite web |title=Pre-Unit A Group |url=https://draganfly.co.uk/index.php/a65anda50/category/871-pre-unit-a-group |website=draganfly.co.uk |accessdate=8 July 2018 |language=en-gb}} 8. ^{{cite web |title=Pre-Unit A Group |url=https://www.draganfly.co.uk/index.php/a65anda50/category/886-pre-unit-a-group |website=www.draganfly.co.uk |accessdate=7 July 2018 |language=en-gb}} 9. ^1 2 {{cite web |last1=Hoseason |first1=Rowena |title=BSA A10 Classic Motorcycle Buying Guide |url=http://www.realclassic.co.uk/bsa_a10_auction_buying_guide.html |website=Real Classic |accessdate=7 July 2018}} 10. ^1 {{cite web |title=1954 BSA A10 Road Rocket |url=https://www.bike-urious.com/1954-bsa-a10-road-rocket/ |website=Bike-urious |accessdate=7 July 2018 |date=18 December 2017}} 11. ^{{cite web |title=BSA A10 Golden Flash Buyers guide |url=http://sump-publishing.co.uk/bsa%20golden%20flash.htm |website=Sump |accessdate=8 July 2018}} 12. ^{{cite book |last1=Assoc |first1=American Motorcyclist |title=American Motorcyclist |date=1957 |publisher=American Motorcyclist Assoc |url=https://books.google.com/?id=YvgDAAAAMBAJ&pg=PA12&lpg=PA12&dq=Laconia+Bend+handlebars#v=onepage&q=Laconia%20Bend%20handlebars&f=false |language=en}} }} Further reading
2 : BSA motorcycles|Motorcycles introduced in 1954 |
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