I noted this force, but pointed out it doesn't apply to bikes. The frontal area, and speeds involved are so small that it has no significance. However, as I also pointed out, you can have a similar situation while pedalling uphill.Steve from JH said:The vehicle does not have to be accelerating for there to be load shift. I used to think that too. I came to realize it wasn't true just a little while before I got this Cossalter book.
The load shift is dependent on a force couple between the thrusting force at the ground and an equal and opposite force acting at the CM. If we assume the air resistance acts at the CM, it doesn't matter whether the force is all reaction to acceleration (launching off from a standstill) or whether part of it is reaction to acceleration and part wind resistance, or whether it's all wind resistance (steady velocity on level ground).
And another also: With a rider of any skill, motocycles hit their drag limited top speed long before they flip over.
Sorry fella but this is demonstrating a basic misunderstanding of engine power and gearing. The faster your moving, the more difficult it is for your engine (or your legs) to produce the force necessary to wheelie. Air resistance might help you wheelie, but not nearly as much as gobs of torque.Steve from JH said:Another corollary of this is that it's easier to wheelie from acceleration on a motorcycle the faster you're going when you start the acceleration. It's hardest (takes the most acceleration) when you wheelie from a standstill.
Again, not sure what this has to do with bicycling. I just like pointing out when you're wrong.