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Ski speedometer, what do you think?

post #1 of 15
Thread Starter 
http://www.tech4o.com/p-30-snowsport-speedometer.aspx

http://www.amazon.com/Tech-O-SI-Ski-...077924&sr=1-17


How It Works

The key to the accuracy of Tech4o watches lies within their accelerometer sensor. The accelerometer sensor works by first detecting changes in the user's movement (acceleration) that are translated into varying degrees of electric current within the sensor. These electric currents are instantly decoded by the Tech4o watches into highly accurate measurements of speed and distance and displayed on the watch face. Accelerometer sensors are commonly found within a diverse range of industrial products in which accuracy is critical to performance, including automobile air bags and tilt meters. Now, thanks to Tech4o engineering, you can experience the same highly accurate measurement of your outdoor performance by using Accelerator™ and Traileader watches to track your own speed and distance!
Technology

The underlying technology in the Accelerator Series Watches is an accelerometer sensor. Accelerometers are used to measure acceleration. Originally developed during the Space Race to replace outdated gyroscopes, accelerometers can be found in a diverse range of today’s products such as automobile air bags and tilt meters. In the Accelerator watch, a user’s movement (acceleration) produces varying degrees of electric current within the sensor, allowing the watch to detect different levels of acceleration, and therefore measure speed and distance.
post #2 of 15
Why would anyone care about numbers for how fast they ski?

I can't believe accelerometers could get a long-term accurate response. GPS would be better.
post #3 of 15
Then there's Matty Mattel's Speed Gun

http://www.amazon.com/Mattel-J2358-H.../dp/B000EHLB0M


It's an actual radar gun for use with Hot Wheels. It has two speed positions one for measuring actual speed and one for measuring scale speed of Hot Wheels cars.
post #4 of 15
Quote:
Originally Posted by learn2turn View Post
Why would anyone care about numbers for how fast they ski?

I can't believe accelerometers could get a long-term accurate response. GPS would be better.
Do they give you any stats on the accruarcy?

I think a GPS would be more useful. Once the novelty wears off finding your speed on ski slopes you can still use it for orienteering on canoe trips and hiking trips (marking campsites etcetera) and for route finding when traveling by car.
post #5 of 15
Thread Starter 
I just remember threads in the past questioning the accuracy of GPS as they don't take altitude into consideration (as I recall ?)

Just curious if anyone has any idea of how accurate this type of technology might be.
post #6 of 15
My gps, Garmin 76CS also records altitude as well as horizontal distance, so if you really want to know you can do the math. (a^2+b^2 = c^2) Just multiply the speed by the ration of c^2 over your horizontal distance.

They should state the accuracy of their product, if it's any good.
post #7 of 15
Quote:
Originally Posted by T-Square View Post
Then there's Matty Mattel's Speed Gun

http://www.amazon.com/Mattel-J2358-H.../dp/B000EHLB0M


It's an actual radar gun for use with Hot Wheels. It has two speed positions one for measuring actual speed and one for measuring scale speed of Hot Wheels cars.
Wow, I would have loved to have that when I was a kid. I had a Funny Money base that was hyper fast over my other cars.
post #8 of 15
Quote:
Originally Posted by learn2turn View Post
Why would anyone care about numbers for how fast they ski?
Read EpicSki much?
post #9 of 15
Originally Posted by learn2turn
Why would anyone care about numbers for how fast they ski?

That is why there are bars at ski areas!
post #10 of 15
Thread Starter 
There have been a number of threads on this and people are very interested in how fast they ski.
post #11 of 15
Since I am a gaper-geek, I tried the tech4O. After replacing it twice due to "issuses" I found it frustrating. It really doesn't work as it should. For instance, you can't reset the speed. So if you take a run and then have someone else take a run, you can't reset the odometer to see the speed of that run. It takes a rolling 7 days Max speed. So even if you are looking at run where you know the speed won't be as high as a steep groomer, you can't see the speed. Otherwise, it's a fun goober-loving toy
post #12 of 15
I just bought that thing, arrived Friday. Finn's review does not sound too promising.
post #13 of 15

Why was the Carraden skis thread removed?

It was just getting good!
post #14 of 15
I'd like to know how that one violated the T's and C's?

If there is any truth to the assertion that Simon Brodie = Simon Carradan, then it is arguably a major community service to keep that thread up. If someone can show that this is not the case, that would be a service as well.

I thought the combo of sketch website and lack of "footprints" was an omen myself...
post #15 of 15
My Grandmother from Oklahoma sent me a ski spedometer when I was 11 years old (1975). It was a plastic tube with an armband. It had a spring inside with a flat piece of plastic on top of the spring in the tube. There was a groove along the legnth of the tube and a little tab that got pushed back by the plastic wing on the spring. The more wind blowing in the tube the farther the tab got pushed back. Of course there were little tick lines along the groove 10 mph 15 mph 20 mph, etc.. I thought it was sooooo cool when I got it. When I bulled it out of my pocket to show the other kids a huge eruption of laughter followed. Anyway, I gor two runs out of it before it fell apart. I must have been going REALLLLY fast: I think the last reading on it was 35 mph.:
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EpicSki › The Barking Bear Forums › On the Snow (Skiing Forums) › Ski Gear Discussion › Ski speedometer, what do you think?