The ball’s deformation upon impact is undesirable because “a tennis ball is required by the
rules of tennis to dissipate a fraction of the energy it absorbs when it deforms against a
hard surface” . More specifically, a ball dropped from a height of 100 inches is required to
bounce back to within 53% to 58% of its original height. To minimize the energy lost by the
ball’s deformation, a large fraction of energy should be absorbed by the racket frame
The ball’s deformation upon impact is undesirable because “a tennis ball is required by the rules of tennis to dissipate a fraction of the energy it absorbs when it deforms against a hard surface” . More specifically, a ball dropped from a height of 100 inches is required to bounce back to within 53% to 58% of its original height. To minimize the energy lost by the ball’s deformation, a large fraction of energy should be absorbed by the racket frame
Unlike the tennis ball, the strings store energy by deforming. Due to their high elasticity, the
strings recover from deformation about five times more quickly than the massive racket
frame, allowing a greater efficiency in returning the stored energy back to the ball – almost
all of the energy stored in the strings eventually returns to the ball.
Tennis players may select a desired string tension. A lower string tension translates into
greater stiffness in the string plane and greater deformation upon hitting the ball. In other
words, lower tension gives the player more power. “There is, of course,” wrote Howard Brody,
a professor of physics at the University of Pennsylvania, “a point of diminishing returns. After
all, you can’t play tennis with a butterfly net. When the strings start moving and rubbing
within the string plane, you begin to get serious energy loss”. Generally, an acceptable
range of tension is specified somewhere on the racket frame; as long as the string tension
lies within this range, there is no need to worry about diminishing returns.
Unlike the tennis ball, the strings store energy by deforming. Due to their high elasticity, the strings recover from deformation about five times more quickly than the massive racket frame, allowing a greater efficiency in returning the stored energy back to the ball – almost all of the energy stored in the strings eventually returns to the ball.
Tennis players may select a desired string tension. A lower string tension translates into greater stiffness in the string plane and greater deformation upon hitting the ball. In other words, lower tension gives the player more power. “There is, of course,” wrote Howard Brody, a professor of physics at the University of Pennsylvania, “a point of diminishing returns. After all, you can’t play tennis with a butterfly net. When the strings start moving and rubbing within the string plane, you begin to get serious energy loss”. Generally, an acceptable range of tension is specified somewhere on the racket frame; as long as the string tension lies within this range, there is no need to worry about diminishing returns.
So physics explains why the tennis racquet will hit a tennis ball further than a bat. A tennis ball is only deisgned to return between 53 – 58% of its energy to the ball whereas the cricket racquet retains the lost energy lost from the tennis ball in the strings and this energy is returned to the tennis ball with the result being an higher energy return rate to the tennis ball.
The Cricket Racket will initially be sold as the Pro Version which is made using a carbon
fibre composite using injection moulding and is targeted at people playing tennis ball
cricket. The Cricket Racket is made entirely from a carbon fibre composite except for the
foot plate which is made of a high impact plastic so that it can be replaced when worn out
from tapping on the ground while batting.
The Strings are a gut based string and we are currently testing various tensions to work out
which tension results in the best power performance from the Cricket Racket.
The replaceable foot plate will be made available in different lengths and different weights
so that the batter can adjust the Cricket Racket feel to suite their batting style and this will
also have an effect on the Cricket Racket harmonics and allows for the position of the sweet
spot on the racket to be adjusted to suite batting styles.
The Cricket Racket (fun) will also be manufactured in the same dimensions in a
fibreglass composite with reduced costs and we are currenlty developing a childrens
version which will be a fibreglass composite and will be 45mm shorter in length but retains
the width and string configuarion and is targeted at getting children into playing tennis
ball cricket.
The handle on the Cricket Racket is a tradional bat size so you can use any rubber grip that
fits a tradional cricket bat on the Cricket Racket.
The Cricket Racket will initially be sold as the Pro Version which is made using a carbon fibre composite using injection moulding and is targeted at people playing tennis ball cricket. The Cricket Racket is made entirely from a carbon fibre composite except for the foot plate which is made of a high impact plastic so that it can be replaced when worn out from tapping on the ground while batting.
The Strings are a gut based string and we are currently testing various tensions to work out which tension results in the best power performance from the Cricket Racket.
The replaceable foot plate will be made available in different lengths and different weights so that the batter can adjust the Cricket Racket feel to suite their batting style and this will also have an effect on the Cricket Racket harmonics and allows for the position of the sweet spot on the racket to be adjusted to suite batting styles.
The Cricket Racket (non Pro) will also be manufactured in the same dimensions in a fibreglass composite with reduced costs and we are currenlty developing a childrens version which will be a fibreglass composite and will be 45mm shorter in length but retains the width and string configuarion and is targeted at getting children into playing tennis ball cricket.
The handle on the Cricket Racket is a tradional bat size so you can use any rubber grip that fits a tradional cricket bat on the Cricket Racket.
The Cricket Racket is increadibly strong due to its carbon fibre construction and part of the
initial testing was to have the frame supported at both ends and then bounced on by a
person to see how the frame would handle the weight of a 80kg person bouncing up and
down on the frame….the result is that the frame flexed a small amount and then returned
to its original shape without any issues…..not only is the Cricket Racket light but it is
increadibly strong.
The Cricket Racket is increadibly strong due to its carbon fibre construction and part of the initial testing was to have the frame supported at both ends and then bounced on by a person to see how the frame would handle the weight of a 80kg person bouncing up and down on the frame….the result is that the frame flexed a small amount and then returned to its original shape without any issues…..not only is the Cricket Racket light but it is increadibly strong.
The Cricket Racket Pro only weighs 430grams fully strung which is increadibly light in
comparison to a cricket bats 1200-1400gram weight….thats an increadible difference in
weight and that differ ence is what allows the Cricket Racket user to play shots later than a
bat with greater adjustability of shot and with greater shot improvisation ability.
The fibreglass version of the Cricket Racket will be marginally heavier that the Pro version
with weights of this version to be provided once testing has been completed.
The childrens version of the Cricket Racket will be fibreglass based and weights to be
provided once testing has been completed.
The Cricket Racket Pro only weighs 430grams fully strung which is increadibly light in comparison to a cricket bats 1200-1400gram weight….thats an increadible difference in weight and that differ ence is what allows the Cricket Racket user to play shots later than a bat with greater adjustability of shot and with greater shot improvisation ability.
The fibreglass version of the Cricket Racket will be marginally heavier that the Pro version with weights of this version to be provided once testing has been completed.
The childrens version of the Cricket Racket will be fibreglass based and weights to be provided once testing has been completed.
The increadibly light weight of the Cricket Racket helps people who do not have arm
strength to have amazing batting performance…such as children or women cricketers but
also gives the ability for the more experience cricketer to have an increadible batting arm
and bat speed as weight is not a performance reducing factor in swinging the Cricket
Racket as it is with a cricket bat.
When playing cricket a batsman likes to be able to adjust their shot mid shot due to factors
such as the bowlers use of tricks to fool the batsman into a mistimed shot….because the
Cricket Rack et is so light batting shots are easily adjusted because the bat weight is not a
factor as the lighter. Cricket Racket does not generate its power exclusively from bat
momentum alone….to put it sim ply….you can only swing your arms so fast when
batting….the difference is that the time it takes for your arms to reach their maximum
swing speed is reduced when using the Cricket Racket……later shots which are more
powerful is the outcome when using the Cricket Racket.
The increadibly light weight of the Cricket Racket helps people who do not have arm strength to have amazing batting performance…such as children or women cricketers but also gives the ability for the more experience cricketer to have an increadible batting arm and bat speed as weight is not a performance reducing factor in swinging the Cricket Racket as it is with a cricket bat.
When playing cricket a batsman likes to be able to adjust their shot mid shot due to factors such as the bowlers use of tricks to fool the batsman into a mistimed shot….because the Cricket Rack et is so light batting shots are easily adjusted because the bat weight is not a factor as the lighter. Cricket Racket does not generate its power exclusively from bat momentum alone….to put it sim ply….you can only swing your arms so fast when batting….the difference is that the time it takes for your arms to reach their maximum swing speed is reduced when using the Cricket Racket……later shots which are more powerful is the outcome when using the Cricket Racket.
The Cricket Racket’s power potential is determined by measuring ball velocities and calculating the ratio of the ball’s outgoing bounce speed to its impact speed. The impact speed is defined as the combined speed of the Cricket Racket and ball just prior to collision.
For a given hitting location the power potential is always a fixed percentage of the impact speed, is a different percentage for each location, and generally varies depending on the strike position on the string weave and location on the Cricket Racket.
For example, if the power potential is 40% in the center of the Cricket Racket, then the ball will bounce from the racket at 40% of the impact speed.
The speed of this bounce is determined by the “local” weight, frame stiffness, and stringbed stiff ness at the impact location.
However, the bounce speed is only one component of the final shot speed. The other component is the swing speed. The bounce occurs off the Cricket Racket that is already traveling at a given speed. The bounce speed is added to the strike speed of the Cricket Racket from which it bouces to get the shot speed:
In each case the impact speed will be 112 kph. If the power potential is 40% at the impact loca tion, the bounce speed will be 45 kph in each case (0.4 x 112 kph = 45 kph). In other words, the power potential built into the construction of the Cricket Racket will deliver 45 kph of bounce speed to each of these 112 kph impact scenarios. The Cricket Racket delivers the same number of kilometres per hour to the shot in each case.
In each case the impact speed will be 112 kph. If the power potential is 40% at the impact loca tion, the bounce speed will be 45 kph in each case (0.4 x 112 kph = 45 kph). In other words, the power potential built into the construction of the Cricket Racket will deliver 45 kph of bounce speed to each of these 112 kph impact scenarios. The Cricket Racket delivers the same number of kilometres per hour to the shot in each case.
But here is the key. The shot speed is different in each case. Remember that bounce speed is only one component of shot speed–we have to add the swing speed to the bounce speed to get the final shot speed:
That is a huge difference in shot speed given that the ball strikes the exact same location at the exact same impact speed in each scenario. Obviously the swing speed has a huge influence on the speed of the shot. The Cricket Racket adds a fixed number of miles per hour to the shot for any given impact speed, whereas the swing adds a variable amount.
You can see that, in this example, the 45 kph added by the racket in each case represents a different per centage of the final shot speed:
The faster the swing speed compared to the ball speed, the less the contribution of the Cricket Racket to the shot speed. The slower the swing speed compared to the ball speed, the greater the influence of the Cricket Racket design to the shot speed
We can summarize the above into one completed table as seen below
The data explains that….the faster the Cricket Racket speed compared to the incoming ball, the less influence the innate properties of the Cricket Racket have on the ball. And contrariwise, the slower the Cricket Racket speed compared to the incoming ball speed, the more contribution the Cricket Racket has to ball speed. So, bunters, pokers, and patty-cakers rejoice! You get more out of your Cricket Racket than do the swing-for-the-fence animals using the same Cricket Racket. You get much more for your money! The Cricket Racket does the work for you and therefore is worth more to your batting game.
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