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12th Man
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Posts: 9 		Direct Link To This Post Topic: How does one measure his bowling speed ?
    Posted: 07 December 2005 at 10:51pm
Hi,

I would like to measure my bowling speed. Is there an inexpensive way of doing it ?
I read that speed guns are used to measure bowling speed, but does anyone know how does it work and how does it measure the speed (of the ball) ? These speed guns seem to be very expensive and are not affordable for individuals, so I am looking for other alternatives and creative ideas.

Thanks,
CricStar
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I think the speed gun is the only way.
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watsa speed gun anyway
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Posts: 397 		Direct Link To This Post Posted: 08 December 2005 at 10:49pm

Here's a couple to look at:

http://www.onsitetools.com/measuring/speed/sports-radar-gun/

 



Edited by swerveman
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Posts: 3938 		Direct Link To This Post Posted: 08 December 2005 at 11:26pm
That's expensive! That's around $250 Canadian...I think.
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The speed gun works using The Doppler Effect - go to any search engine to see exactly what that is.
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Posts: 98 		Direct Link To This Post Posted: 09 December 2005 at 8:42pm

there is a special ball which has a speedometer on it.  Of course its the size of a cricket ball and its sold at Bedessee in Toronto for $40.

Cost Effective.
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Posts: 3938 		Direct Link To This Post Posted: 09 December 2005 at 10:21pm
Really?... I didn't know about this. $40 is quite cheap compared to the price of the speed gun.
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Direct Link To This Post Posted: 13 December 2005 at 10:59am

i will go with the speed gun.there are many problems and factors to be considered while getting an accurate speed.i know that speed gun isn't 100% accurate but lets not forget that it is considered as one of the standard speed measuring equipment.so whatever speed you get on the speed gun, will in-fact be your bowling speed.on the other hand if you buy this speedometer ball it can give you a totally different result which may please you but maynot be as significant when it comes to professional cricket .so basically you are left with a cheap toy ball in the end.(i checked with google but the only ball i found with a speedometer was a base ball, which has a different circumference,weight,air resistance etc. i cant trust something which isn't on the net, please send me a link or a website where i can find such a ball).
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Direct Link To This Post Posted: 13 December 2005 at 11:09am

Originally posted by Sledger

The speed gun works using The Doppler Effect - go to any search engine to see exactly what that is.

Doppler effect... hum interesting, i thought they used it only to locate things like ships and airplanes through radars.

its just a law,so dosent really matter where they apply it. ha ha so stupid of me



Edited by zubeee
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Posts: 3938 		Direct Link To This Post Posted: 13 December 2005 at 1:05pm
Originally posted by zubeee

i will go with the speed gun.there are many problems and factors to be considered while getting an accurate speed.i know that speed gun isn't 100% accurate but lets not forget that it is considered as one of the standard speed measuring equipment.so whatever speed you get on the speed gun, will in-fact be your bowling speed.on the other hand if you buy this speedometer ball it can give you a totally different result which may please you but maynot be as significant when it comes to professional cricket .so basically you are left with a cheap toy ball in the end.(i checked with google but the only ball i found with a speedometer was a base ball, which has a different circumference,weight,air resistance etc. i cant trust something which isn't on the net, please send me a link or a website where i can find such a ball).



I agree with you. It's better to buy the more expensive speed gun and get accuracy rather than buying the cheap ball which is probably not as accurate as the speed gun.
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How do you actually use a speed gun? Is the speed officially measured from the front where the batsman is? At what angle?
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All I know is that the speeds that are showed up on the TV, is from when the ball is release and not when it reaches the batsman. And you'll be surprise that a 90 MPH delivery slows down a lot off the pitch!
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Posts: 501 		Direct Link To This Post Posted: 02 July 2007 at 12:29am
Originally posted by spin wizard

All I know is that the speeds that are showed up on the TV, is from when the ball is release and not when it reaches the batsman.


That would explain a lot. It would also suggest that the length of the delivery must have a significant impact on the accuracy of the reading. Doppler radars only detect the component of the target's velocity going toward the antenna, and a bouncer would come out of the bowler's hand at quite a large downward angle compared to other balls, making the reading not properly representative of how fast the ball is going, if you know what I mean.
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Posts: 9453 		Direct Link To This Post Posted: 02 July 2007 at 12:36am

Oh gosh, leave out the science. LOL
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Posts: 86 		Direct Link To This Post Posted: 02 July 2007 at 1:31pm
Originally posted by Roscoe

That would explain a lot. It would also suggest that the length of the delivery must have a significant impact on the accuracy of the reading. Doppler radars only detect the component of the target's velocity going toward the antenna, and a bouncer would come out of the bowler's hand at quite a large downward angle compared to other balls, making the reading not properly representative of how fast the ball is going, if you know what I mean.
To make it more technical, the speed gun only measures the horizontal vector of the velocity. It does not measure the vertical vector.

The actutal speed = square root of [(horizontal vector)^2 + (vertical vector)^2]

In the past the average speeds were calculated. In this both vectors are taken in to account, but the speed given is the average speed of the delivery.

Avg. speed can be easily measured by measuring the time taken for a ball to reach the batsman. the number of frames of a camera will give it easily.

If you know the air resistance and the degree it slows down the ball by differentiation you could find the initial speed of the ball.

(This is for people who know what I have posted)
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Posts: 51 		Direct Link To This Post Posted: 03 July 2007 at 5:17pm
I had been searching the net for articles on seam bowling lately and found an interesting article which shows you an easy way of measuring your speed. I know it might not be as accurate as they show on TV but a way of finding the speed nonetheless Smile. I will just paste the particular section containing the method.

Originally posted by From that article


so how fast do you actually bowl? Naturally, the best thing possible to use would be a radar gun - however they're not generally widely available to clubs and schools - but there is a simple way that needs just a stopwatch and a calculator (or maths geek) to provide approximate results. Start the stopwatch when the ball is released, and then stop it again when either the batsman hits (or misses) it, then divide 45 (or 72) by your answer to get your answer in miles per hour (or kilometres). For example, a delivery timed at 1 second has travelled at about 45mph (72kph). To break the magical 100mph (160kph) barrier, the clock must register at 0.45 seconds. Once you get used to working the timer, you will get surprisingly consistent results. I've found that standing at the back of the net, either directly behind or just to the side, gets the best results.



PS: wow nice  user titles!Big%20smile...I am the 12th man huh ? lol and who's that...that mean i am not even in the team now Tongue


Edited by STNOOR - 03 July 2007 at 5:20pm
The Future Shoaib Akhter with the difference being that i will be a left hander and reverse swinging like Waqar Younis even in the early overs...hahaa :P.
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This is the one I would recommend.

http://www.opticsplanet.net/speedcheck-radar.html

However, I dont quite get the fetish many people have for finding out speed or quoting speed. Most speeds people quote are inaccurate and many seem to be fixated on numbers.
 
Id guess that 90% of people playing below FC that quote speeds of themselves or their friends are wrong either because its complete guess work or poor equipment.
 
PS from my experience the speed ball is a waste of time. Whilst I am a quick bowler, the fact Ive had it regularly clocking over 90mph of 3 steps shows it isn't accurate.
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Posts: 12 		Direct Link To This Post Posted: 18 July 2007 at 1:43pm
Hi,
 
Did you ever get an answer on this - I work for Radio Five Live and we've got the Darren Gough cricket phone in tomorrow night from 8pm - would you want to ask Darren your questions?
 
Let me know
Mobile is 07809 597 753 or email garth.brameld@bbc.c.o.uk
 
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 Ask him who's a better fast bowler than himself , I'd expect a short, sharp  reply!
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Posts: 1833 		Direct Link To This Post Posted: 18 July 2007 at 4:38pm
Originally posted by brambarr

Hi,
 
Did you ever get an answer on this - I work for Radio Five Live and we've got the Darren Gough cricket phone in tomorrow night from 8pm - would you want to ask Darren your questions?
 
Let me know
Mobile is 07809 597 753 or email garth.brameld@bbc.c.o.uk
 
All the best
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Has he learned to speak English yet - if not, no point as we will not understand him.
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Posts: 432 		Direct Link To This Post Posted: 19 July 2007 at 7:52am
Jeez, you guys pulled this one out of know where.
 
Yeh, you can by a speed ball, which does tell you how fast your delivery was -but you can't hit it with a bat obviously.
 
Otherwise get a speed gun.

See you later Gilly! Thanks for the memories!
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Posts: 51 		Direct Link To This Post Posted: 24 July 2007 at 6:19am
i think if we apply the formula
V = S/T
it should tell you the speed of the ball ?. I think this is the formula that speed guns work on too ??.


Edited by STNOOR - 24 July 2007 at 11:38am
The Future Shoaib Akhter with the difference being that i will be a left hander and reverse swinging like Waqar Younis even in the early overs...hahaa :P.
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no.. S = D/T

See you later Gilly! Thanks for the memories!
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Posts: 51 		Direct Link To This Post Posted: 24 July 2007 at 11:12am
Originally posted by cricketluva

no.. S = D/T


huh ?. I know i am not good in physics but that is certainly not the equatio Tongue
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Posts: 4221 		Direct Link To This Post Posted: 24 July 2007 at 11:20am
Speed = Distance/Time

If you know the distance of your bowl divide it by how long it took to get to the other side.

It might work, get a tape measure and mark out where your bowl lands and get someone with a good stop watch and time it.
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Posts: 1928 		Direct Link To This Post Posted: 24 July 2007 at 11:25am
I was sitting here trying to work out what the S in the equation stood for, i cant believe i didn't work out it was speed. I always use V for velocity 
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Posts: 51 		Direct Link To This Post Posted: 24 July 2007 at 11:27am
no S isn't Speed, in equation i posted S = Displacement. that is total distance traveled.




Edited by STNOOR - 24 July 2007 at 11:35am
The Future Shoaib Akhter with the difference being that i will be a left hander and reverse swinging like Waqar Younis even in the early overs...hahaa :P.
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Posts: 4221 		Direct Link To This Post Posted: 24 July 2007 at 11:33am
Originally posted by NZ_Fast

I was sitting here trying to work out what the S in the equation stood for, i cant believe i didn't work out it was speed. I always use V for velocity 

Different countries might use a different equation. In Australia we used this method. Maybe we're the only ones.
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Posts: 4221 		Direct Link To This Post Posted: 24 July 2007 at 11:48am
Originally posted by STNOOR

no S isn't Speed, in equation i posted S = Displacement. that is total distance traveled.


They both mean the same thing. Just different words for each factor.


Edited by MP12 - 24 July 2007 at 12:05pm
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