Turning on snowboard or surfboard

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In summary, the rider is leaning at around 45 degrees at times and the g-force at that point is essentially independant of the speed and turn radius. Getting really low, say 30 degrees, is a simple sin cos or tan calculation.
  • #1
evnmorfun
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In a turn, a rider might be leaning over at around 45 degrees at times. What is the g-force at that point going down into his feet ? I'm thinking that it is essentially independant of the speed and turn radius. Also, I'm thinking the rider is close enough to standing straight - no bent knees or hips, arms near to by his or her sides. What about getting really low - say 30 degrees ? Is it a simple sin cos or tan calculation ?
 
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  • #2
the force due to gravity is his mass times the local gravitational field strength- neither depend on any angles. In snowboarding the rider himself doesn't lean, you still keep your weight more or less over the board (maybe a little in a fast tight turn), mostly you angle the board so that the "bloated" ends bend upwards slightly, and then you trace a curved path.
 
  • #3
That's not correct. You can calculate the g-force (acceleration) required for a balanced turn for a snow board, surf board - even an airplane, knowing only the bank angle.

For a snowboard and surfboard, in order to not fall over, the resultant effective gravitational acceleration vector of your center of gravity must pass through your board. Ie, if you lean to far to the right, you fall over to the right. So to balance the forces, you draw a diagram showing the resultant vector pointing from your CoG to the board, the gravitational force vector straight down, and a third vector horizontal into the turn. You have all three angles and the magnitude of one side, so you can solve for the magnitude of the other sides.

For a 45 degree bank angle, you have a 45/45/90 right triangle, so the horizontal and vertical components are both 1g and the resultant force (the one you "feel") is 1.4g.
 
  • #4
I think about this when I'm riding my boards all the time!

How many g's you are pulling is dependent on your velocity and radius of curvature.

Take the constant velocity circular motion equation for normal accelleration:

a=(velocity)^2/(radius of your turn)

to find how many g's you pull divide 'a' by 'g', gravity constant.
 
  • #5
Thanks , Russ , I definitely like yours the most.
 

1. What is the proper technique for turning on a snowboard or surfboard?

The proper technique for turning on a snowboard or surfboard involves shifting your weight and using your body to guide the board in the desired direction. For a snowboard, you should lean your body in the direction you want to turn and use your back foot to apply pressure to the back edge of the board. For a surfboard, you should use your arms and upper body to shift your weight and carve the board in the desired direction.

2. What are some common mistakes beginners make when trying to turn on a snowboard or surfboard?

Common mistakes beginners make when trying to turn on a snowboard or surfboard include leaning too far back, not using their back foot to steer, and not shifting their weight properly. These mistakes can lead to loss of control and difficulty in turning the board.

3. Is it easier to turn on a snowboard or surfboard?

This can vary based on personal preference and skill level. Some people may find it easier to turn on a snowboard due to the use of bindings and being able to control both feet. Others may find it easier to turn on a surfboard due to the larger surface area and more natural body movements.

4. How do different types of snow or water conditions affect turning on a snowboard or surfboard?

The type of snow or water conditions can greatly impact turning on a snowboard or surfboard. For example, powder snow can make it more difficult to turn on a snowboard, while icy conditions can make it easier. For surfboards, choppy water can make it more challenging to turn, while smooth waves can make it easier.

5. Are there any specific techniques for turning on a snowboard or surfboard in more difficult terrain?

Yes, there are specific techniques for turning on a snowboard or surfboard in more difficult terrain. For snowboards, you may need to use a combination of leaning and carving to navigate through steep or narrow areas. For surfboards, you may need to use your arms and upper body more to steer and maintain control in rougher waters.

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