Tuesday, November 15, 2011

Advanced Bend Assessment with pictures and video from Advancedbiker

One of the issues I have when out advanced training and advanced testing with motorcycles is bend assessment.  All credit to the riders, they know the principles of 'ROADCRAFT' and yes they position for the bends - BUT - What do you do when you have got your view?
Lets have a look at a series of stills taken form a video of the A519 from Woodseaves in Staffordshire towards Newport in Shropshire.
REMEMBERING:
Cornering is a hazardous manoeuvre, but is a necessary one because of our road systems. Too many riders the art of cornering is one area where they have the greatest problem.  The principles of
cornering need to be explained first. You must always remember that each rider has his or her own limit and this must never be exceeded. You know the temptation, ‘If my mate can get round the bend, I can’.
Always remember:
  •  GO IN SLOW,
  • MAINTAIN A CONSTANT SPEED AROUND THE BEND BALANCING THE MOTORCYCLE WITH A SMALL AMOUNT OF THROTTLE, AND
  •  ACCELERATE OUT. ( IS IT IS SAFE TO DO SO )
Once you have mastered this the FEEL GOOD FACTOR IS GREAT !

 I will try and explain the principles of cornering in plain English, so here goes..............
CORNERING FORCES
A motorcycle is most stable when it is travelling upright, in a straight line at a constant speed. To alter its direction i.e. in this case in order to go around a bend a directional force is applied. In otherwords you turn the handlebars. When you do this the grip on the front wheel increases and the speed of the motorcycle reduces slightly. To get around the bend you lean either left or right to maintain the stability of the motorcycle.
Remember that if you brake or accelerate when in a bend you lesson the grip on the tyres. If the grip on the tyres is lessened then the motorcycle will want to go straight. In otherwords on a left-hand bend it tends to drift towards the offside on the road and into the face of oncoming traffic. On right hand bends towards the kerb or hedge. I am sure we have all experienced this during our riding and have never known why this happens.
In order to maintain control, stability and clean underwear after CORNERING the following factors and measures can be applied.

APPROACHING A BEND

 You must consider the following when you approach any bend :-
A) Speed of motorcycle on approach
B) Gear of motorcycle
C) Traffic on road, ahead as well as behind
D) View into and out of bend
E) Application of the ‘System’
F) Can the limit point be seen?

 STABILITY IN THE BEND
On entering the bend you must be able to maintain the stability of the motorcycle, that is maintaining
control. To do this you must assess the curvature of the bend and maintain a constant speed. The engine
should be just pulling to compensate for the slight reduction in speed caused by the bending force. Look for
the limit point and as it goes away from you apply more power, if it is save to do so. You must always be able
to stop in the distance you see to be clear.
The secret of safe bending is:
  • Technique,
  • Observation,
  • System,
  • Control and
  • Good assessment of a safe bending speed, which is within your own limits.


NO ISSUES with this one, the rider is out towards the centre of the road - Position 5 - no oncoming vehicles, NO DANGERS.  Goods view over the hedgerows as the road appears to go right after the bend he is about to commit to.  So with forward planning why not PLAN for the right as you enter the left.

In position for th right hand bend - No nearside DANGERS

The right hand bend leads onto a short striaght and then what appears to be a left.  Have a look at the tree line in the distance.

Yes road goes left


Moving on - Still good postioning, good speed, IN CONTROL and now looking for information .... Road looks like it is going right in the distance - Tree Line

Yes it does

Could be going left after if the tree line to the right is correct

Yes it does

Rider staying on line too long.  He had his view.  Look where my motorcycle is in relation to his




Lets us have alook at the video.....
Towards the end we look at uising a numbering system to get the rider to plan his ride better

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