Ball speed monitors

[Timmyb]

Does anyone have any idea how accurate the speed displayed on the screens at bowling alleys actually are? I bowled at one house a while back, and was showing close to 18, but at another it was under 16. I didn't feel slow, so what gives?

[AlexNC]

Does anyone have any idea how accurate the speed displayed on the screens at bowling alleys actually are? I bowled at one house a while back, and was showing close to 18, but at another it was under 16. I didn't feel slow, so what gives?

While I can't give a definitive answer, I can tell you that any house I bowl at gives a different result. There is one house in particular that is unique as it gives the speed on the monitor, but they have another speed display mounted at the pins - and they are two different speeds. Haven't bowled there in a while, but perhaps they were measuring both speed at release and at the pins, but not sure.

You can get a more accurate measure of your speed by finding the elapsed time from release to pins using a stopwatch:

3.0 sec./13.9 mph.
2.9 sec./14.4 mph.
2.8 sec./14.9 mph.
2.7 sec./15.4 mph.
2.6 sec./16.0 mph.
2.5 sec./16.7 mph.
2.4 sec./17.4 mph.
2.3 sec./18.1 mph.
2.2 sec./19.0 mph.
2.1 sec./19.9 mph.
2.0 sec./20.8 mph

[Amyers]

While I can't give a definitive answer, I can tell you that any house I bowl at gives a different result. There is one house in particular that is unique as it gives the speed on the monitor, but they have another speed display mounted at the pins - and they are two different speeds. Haven't bowled there in a while, but perhaps they were measuring both speed at release and at the pins, but not sure.

You can get a more accurate measure of your speed by finding the elapsed time from release to pins using a stopwatch:

3.0 sec./13.9 mph.
2.9 sec./14.4 mph.
2.8 sec./14.9 mph.
2.7 sec./15.4 mph.
2.6 sec./16.0 mph.
2.5 sec./16.7 mph.
2.4 sec./17.4 mph.
2.3 sec./18.1 mph.
2.2 sec./19.0 mph.
2.1 sec./19.9 mph.
2.0 sec./20.8 mph

Good info Alex. The speed monitors at bowling alley are very inaccurate.

[mc_runner]

Alex, is that speed overall? Or at the pins? I remember seeing a conversion table awhile back (probably posted by bowl1820) but can't remember where that speed was measured at since the ball slows down as it transitions to hook and roll

[Amyers]

Alex, is that speed overall? Or at the pins? I remember seeing a conversion table awhile back (probably posted by bowl1820) but can't remember where that speed was measured at since the ball slows down as it transitions to hook and roll

Could be wrong but I think the stop watch method gives you the average speed not at release or pins. I'm sure bowl1820 will correct me if I'm wrong.

[AlexNC]

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Could be wrong but I think the stop watch method gives you the average speed not at release or pins. I'm sure bowl1820 will correct me if I'm wrong.

I'm pretty sure its average speed. There is a way to use reference points for the speed at release and the speed at the pins (arrows etc.) I'm pretty sure its average speed. There is a way to use reference points for the speed at release and the speed at the pins. If I recall correctly, the Storm VLS spreadsheet has you calculate speed at release using the moment the ball leaves your hand and then crosses the arrows.

[Goose]

To add to AlexNC's comment, I watched a youtube by Talk Bowling and they gave this calculation for ball speed and I cross referenced it to the ball speed measured at the lane and it was on target.

41.14/seconds from your stop watch = ball speed

[bowl1820]

Yes the stopwatch method gives you average ball speed.

Ball speed monitors are notorious for being off, usually they don't keep the maintenance up on them. When they are working okay, The angle ball pass's through the sensor can affect the reading somewhat. Lane conditions have a affect also.

The main thing to use the monitor speed for is to watch for variation in speed. If your slowing down or speeding up.

There are 3 basic speed measurements:

Ball Speed at Release:
This is the main one that is usually asked for when giving your bowler spec's. It's measured in the first 15 feet of the lane this used instead of the whole lane to attempt to take friction, as well as ball motion out of the equation. You typically measure this using the video camera method.

Speed at the Pins:
This is the speed usually showed on the monitors, the angle the ball goes through the sensors has a small affect on the speed readout.

The rule of thumb to figure your off hand release is to add 3 mph to the monitor speed. Example: 15mph on the monitor plus 3mph gives you a release speed of 18mph.

The closest way to get your off hand speed using the monitor is to roll a plastic ball straight down the middle of the lane.

Overall speed:
This is the one measured using the stop watch method.

There is a IPhone/IOS app called "Bowl Speed" which is surprisingly accurate, but you need someone to operate it while you bowl.

[NewToBowling]

Using the monitors your ball speed will be different from strike to spare ball. Your spare ball will measure a bit faster as it is going straight vs angle on strike ball. At least that has been my experience

[ChuckR]

I find the best ball speed monitor is the pins. If I am to fast I slide past the head pin. To slow and splits. I haven't figured out what knowing a ball speed ahead of time offers.