Join Date: Feb 2012
Location: coogee beach australia
Thanked 1,244 Times in 753 Posts
say youre riding a dinkie [childs three wheeler] and push on the bar [left, say]
then the dinkie will follow the wheel ie, turning right.. [dinkie exaggerates]
but, where is your weight/mass and momentum going..
turn sharply and your mass continues forward, tending left..
ok, now its a single track vehicle,, [pushbike say] now push bar left
and rather than steering the rear wheels around [ala dinkie] now
you are 'bending' the single track [at the steering head, over front wheel]
to its right, causing similar momentum shift left but without the two
rear wheels [holding dinkie upright], the single track vehicle will
tend to lean into the direction of mass and momentum [left]..
take it as given that a single track vehicle will curve its movement
toward or into the direction of its lean..
so, having caused the bike to slightly lean/curve left by pushing left,
the bike will continue curving left unless you initiate opposite action..
so the wheel beneath the steering head will turn slightly, away from,
the curve causing slight lean into the curve, then turn following the lean
into, the curve.. [lots of text to describe a fairly simple reality]
also, aside from the strict physics etc, the motorcycle with wheels aligned
will respond to quite subtle changes in c of g and mass movement on it..
so even when you think you have only thought of, curving away from
your straight trajectory, there will be slight head movement as you
look towards your intended direction,, and/or any of a wide range of
other body/arms/hips/thighs etc movements relative to that curve
which will tend to continue movement into the curve..
everyone knows the feeling of 'just thinking left or right' to change direction..
point being that this is real, and also a subtle thing or process..
as other members have observed here, those who have been riding normally
for any length of time will have been initiating curves within this process..
its a bit like, say, knowing in which direction your bowel twists,
in order to expel its 5hit,, interesting, but not vital
for the process to happen..
[when you do know, however, your brain has just another potential tool
for increased, if subtle, potential for, 'more efficient' bowel movements...]