Slipper clutch: Difference between revisions
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A '''slipper clutch''' ''(also known as a '''back-torque limiter''')'' is a specialized [[clutch]] developed for performance oriented [[motorcycle]]s to mitigate the effects of [[engine braking]] when riders decelerate as they enter corners. They are designed to partially disengage or "slip" when the rear wheel tries to drive the engine faster than it would run under its own power. The engine braking forces in conventional clutches will normally be transmitted back along the [[drive chain]] causing the rear wheel to hop, chatter or lose traction. This is especially noted on larger displacement [[four-stroke engine]]s, which have greater engine braking than their [[two-stroke]] or smaller displacement counterparts. Slipper clutches eliminate this extra loading on the rear suspension giving riders a more predictable ride and minimize the risk of over-reving the engine during downshifts. Slipper clutches can also prevent a catastrophic rear wheel lockup in case of engine seizure or transmission failure. Generally, the amount of force needed to disengage the clutch is adjustable to suit the application. |
A '''slipper clutch''' ''(also known as a '''back-torque limiter''')'' is a specialized [[clutch]] developed for performance oriented [[motorcycle]]s to mitigate the effects of [[engine braking]] when riders decelerate as they enter corners. They are designed to partially disengage or "slip" when the rear wheel tries to drive the engine faster than it would run under its own power. The engine braking forces in conventional clutches will normally be transmitted back along the [[drive chain]] causing the rear wheel to hop, chatter or lose traction. This is especially noted on larger displacement [[four-stroke engine]]s, which have greater engine braking than their [[two-stroke]] or smaller displacement counterparts. Slipper clutches eliminate this extra loading on the rear suspension giving riders a more predictable ride and minimize the risk of over-reving the engine during downshifts. Slipper clutches can also prevent a catastrophic rear wheel lockup in case of engine seizure or transmission failure. Generally, the amount of force needed to disengage the clutch is adjustable to suit the application. |
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Slipper clutches have been used in most high displacement four stroke racing motorcycles since the early 1980s. Slipper clutches were introduced in the 1970's by John Gregory and TC Christenson on "Hogslayer" the most successful drag racing motorcycle of the 70's.<ref>[http://www.motorbike-search-engine.co.uk/classic_bikes/1975-norton-drag-bike.php Hogslayer web article] |
Slipper clutches have been used in most high displacement four stroke racing motorcycles since the early 1980s. Slipper clutches were introduced in the 1970's by John Gregory and TC Christenson on "Hogslayer" the most successful drag racing motorcycle of the 70's.<ref>[http://www.motorbike-search-engine.co.uk/classic_bikes/1975-norton-drag-bike.php Hogslayer web article] Specifications, history, and images.</ref> Made of bronze sintered plates from an earthmover and a Rambler 2 speed transmission, the drivetrain let TC become the fastest man on the planet, reaching 180 mph in the quarter mile. Slipper clutches were also used in [[Honda]]'s [[Honda Interceptor|750 Interceptor]] factory superbikes that same year. Before long slipper clutches could be found in nearly every big bore four-stroke race bike. Slipper clutches are now gradually being factory installed on production motorcycles such as the [[Aprilia]] RSV Mille, [[Ducati 1198]], 2008+ [[Honda CBR1000RR]], [[Yamaha YZF-R6]] 2006-2008, Yamaha YZF-R1 SP 2006 , [[Yamaha YZF-R1]] 2007 , [[Yamaha V-Max]] 2009, [[Kawasaki ZX-10R]], [[Kawasaki ZX-6R and ZX-6RR]], [[Suzuki]] [[Suzuki_SV1000|SV1000]] and [[Suzuki_GSX-R1000|GSX-R1000]] 2005-2007, [[Harley Davidson]] V-Rod VRSC 2008, and are available as retrofit for many other models. |
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Slipper clutches have also been used to a lesser extent on automobiles, primarily those powered by motorcycle engines and some experimental aircraft. They can also be found on racing [[remote control car]]s. |
Slipper clutches have also been used to a lesser extent on automobiles, primarily those powered by motorcycle engines and some experimental aircraft. They can also be found on racing [[remote control car]]s. |
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Revision as of 01:02, 8 January 2009
A slipper clutch (also known as a back-torque limiter) is a specialized clutch developed for performance oriented motorcycles to mitigate the effects of engine braking when riders decelerate as they enter corners. They are designed to partially disengage or "slip" when the rear wheel tries to drive the engine faster than it would run under its own power. The engine braking forces in conventional clutches will normally be transmitted back along the drive chain causing the rear wheel to hop, chatter or lose traction. This is especially noted on larger displacement four-stroke engines, which have greater engine braking than their two-stroke or smaller displacement counterparts. Slipper clutches eliminate this extra loading on the rear suspension giving riders a more predictable ride and minimize the risk of over-reving the engine during downshifts. Slipper clutches can also prevent a catastrophic rear wheel lockup in case of engine seizure or transmission failure. Generally, the amount of force needed to disengage the clutch is adjustable to suit the application.
Slipper clutches have been used in most high displacement four stroke racing motorcycles since the early 1980s. Slipper clutches were introduced in the 1970's by John Gregory and TC Christenson on "Hogslayer" the most successful drag racing motorcycle of the 70's.[1] Made of bronze sintered plates from an earthmover and a Rambler 2 speed transmission, the drivetrain let TC become the fastest man on the planet, reaching 180 mph in the quarter mile. Slipper clutches were also used in Honda's 750 Interceptor factory superbikes that same year. Before long slipper clutches could be found in nearly every big bore four-stroke race bike. Slipper clutches are now gradually being factory installed on production motorcycles such as the Aprilia RSV Mille, Ducati 1198, 2008+ Honda CBR1000RR, Yamaha YZF-R6 2006-2008, Yamaha YZF-R1 SP 2006 , Yamaha YZF-R1 2007 , Yamaha V-Max 2009, Kawasaki ZX-10R, Kawasaki ZX-6R and ZX-6RR, Suzuki SV1000 and GSX-R1000 2005-2007, Harley Davidson V-Rod VRSC 2008, and are available as retrofit for many other models.
Slipper clutches have also been used to a lesser extent on automobiles, primarily those powered by motorcycle engines and some experimental aircraft. They can also be found on racing remote control cars.
One-way sprag-type clutches have also been used for the same purpose, but are generally not adjustable for disengagement force.
References
- ^ Hogslayer web article Specifications, history, and images.
External links
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