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Desmobill

Desmobill

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Dec 28, 2013
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I've just had a strange experience with this. Let me first say that it's an awesome tool. The ability to see all these variables by lap and visualize your lines is fantastic. Now that I've used it, I noticed that it measures distances incorrectly. The track is 2.68 miles, and DDA is measuring 2.4 to 3.1 miles depending on the lap. A member here compared lap times from DDA and a reliable laptimer and found DDA consistently shorting 0.3 seconds. Any of you guys experienced anything similar?
 
I find it losing signal from time to time. When that happens it appears to do weird things with the path that it records.

Not as reliable as a decent lap timer.
 
That's a bummer, because I love that you can compare lines and speed on each line. I think I'll keep it and complement it with a lap timer.
 
I'm planning on running the DDA and the "Harry's laptimer" app with a DUAL gps sensor in parallel ...

Just no TD planned right now
 
Harry's laptime sucks. I never know if it's on or off. That was my first solution since it was so cheap. It worked about 50% of the times. How are you doing with it?
 
Desmobill said:
I've just had a strange experience with this. Let me first say that it's an awesome tool. The ability to see all these variables by lap and visualize your lines is fantastic. Now that I've used it, I noticed that it measures distances incorrectly. The track is 2.68 miles, and DDA is measuring 2.4 to 3.1 miles depending on the lap. A member here compared lap times from DDA and a reliable laptimer and found DDA consistently shorting 0.3 seconds. Any of you guys experienced anything similar?
Click to expand...

How is that 2.68 miles measured? If it's around the track at centerline, then I can see how the actual path traveled by the GPS could be between 2.4 to 3.1 depending on which lines you are taking. That said, I think the GPS part of the DDA+ could be vastly improved by adding another receiver in the tail pod and making it a DGPS solution for high accuracy. Then we could really start blowing up the overlay and see how line choices affect entry and exit speeds, lap times, etc...
 

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