OP
@grouper avatar
UTC

Hooked
2020 GTS 300 hpe Touring
Joined: UTC
Posts: 433
Location: Upstate SC
 
Hooked
@grouper avatar
2020 GTS 300 hpe Touring
Joined: UTC
Posts: 433
Location: Upstate SC
UTC quote
The gyroscope demonstrates perfectly what happens when we counter steer. In this example think of the rotor as the front wheel. The inner ring represents the handlebars, and the outer ring represents the bike. In the video you can see that once the rotor is spinning, slight pressure either forwards or backwards on the inner ring (handlebars), causes the outer ring (bike) to immediately lean. When we counter steer, the bike leans and dips exactly like this outer ring turns on its axis. This is a force of nature and a law of physics that can't be avoided.

@stickyfrog avatar
UTC

Moderatus Rana
MP3 250 and 2 MP3 500s
Joined: UTC
Posts: 22659
Location: Nashville, Indiana
 
Moderatus Rana
@stickyfrog avatar
MP3 250 and 2 MP3 500s
Joined: UTC
Posts: 22659
Location: Nashville, Indiana
UTC quote
Great post. Gyroscopic forces are in play. Ironically I just found this article that does a good job explaining it.
Quote:
Gyroscopic forces and inertia resist our attempts to turn the front wheel. The force we apply to the handlebars turns the wheel along the longitudinal plane, tilting the axis of the rotating mass (ie the axle of the front wheel), banking the motorcycle. This creates the entire counter steering effect, push right to turn right. Most motorcycles will experience the adequate gyroscopic inertia over 15 mph. Weight, wheelbase, and wheel and tire size contribute to how much power you need to overcome the forces Mother Earth applies on your bike. So Tyler, a small-cc Honda will be easier to steer than a decked-out Harley dresser. It's one of the reasons why smaller bikes are generally more nimble and easier to throw around corners.
https://www.rideapart.com/features/257894/ask-rideapart-how-the-hell-does-counter-steering-work/
@znomit avatar
UTC

Veni, Vidi, Posti
LX190 Friday afternoon special, [s]Primavera[/s], S50, too many pushbikes
Joined: UTC
Posts: 10356
Location: Hermit Kingdom
 
Veni, Vidi, Posti
@znomit avatar
LX190 Friday afternoon special, [s]Primavera[/s], S50, too many pushbikes
Joined: UTC
Posts: 10356
Location: Hermit Kingdom
UTC quote
If you build a wheel that has a counter rotating wheel inside it the gyroscopic effect is nulled, the counter steering geometry is the same though.
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 43907
Location: Pleasant Hill, CA
 
Moderaptor
@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 43907
Location: Pleasant Hill, CA
UTC quote
Both geometry (caster etc) AND the gyro effect are in play. Watch a cyclist staying upright with feet on the pedals while stationary at a traffic light - it's not just balance, the front wheel has to be moved one way then the other to keep the main mass from falling over. That's all down to the geometry of the steering column and the rake of the front wheel in front of the steering axis.
@max6200 avatar
UTC

Banned
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
 
Banned
@max6200 avatar
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
UTC quote
Great video AND introduced in simple to understand terms. Thank you.
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