Harry, So I'm at the starting position. The starter hits the ready to go button on my iphone and gives me the indication that I can charge through the course. For some reason, Lap Timer isn't starting the recording until a few moments later, basically after I've passed through the first obstacle on ...

Awesome, looks really cool. Is it o.k. I feature one of the photos plus the video on LapTimer's Facebook page? - Harry P.S. Changed your post to show the video embedded. Yea, totally. Let me know when you do. I'll check it out when you do. Thanks for embedding the Youtube vid. I couldn't figure out...

I'm an idiot. I had the switch in the wrong position...

Was able to configure it w/my iPhone somehow, but when I launched the Dual bluetooth GPS utility, it didn't recognize it either, so I knew something was wrong.

I'm trying to connect my iphone 4 to my new xgps 150a device. My iphone is paired to the XGPS, but when I try to connect to it in HLT, it doesn't show up in the sensors list. What am I doing wrong? Thanks!

I believe you need to add a photo of this Raptor F500! - Harry Most def: Not from the week I took the video, but this is what it looks like w/my friend driving it. http://i.imgur.com/JucL4X4.jpg?1 http://i.imgur.com/NJLqv2q.jpg Here's from a few weeks before where my other friend and I were working...

Here is a compilation from the autocross from two weekends ago. [youtube]http://www.youtube.com/watch?v=3CYRMGFcbYQ[/youtube] I used Laptimer Petrolhead on my iphone 4 w/the built in GPS receiver. Dual XGPS150A is on it's way. I mounted it up using a hitcase pro ( http://www.hitcase.com/hitcase-pro ...

Yes, the Dual will give you much better values here. On recalibration: usually LapTimer keeps a calibration achieved. There are certain situations however, things are reset. LapTimer runs a sanity check calibration is fine from time to time. If e.g. LapTimer detects zero speed, but a high accelerat...

Autocross is difficult in this respect as it has rapid direction changes actually requiring a much higher recording rate than 1 Hz. So in case you are serious about acceleration, a higher rate GPS is recommended. Will the Dual XGPS 150 Bluetooth GPS Tranciever work good for AX? My plan was to use t...

I used laptimer for the first time this past weekend's autocross. Working on compiling my videos so I can share with my codriver. I have a couple runs where it looks like the accelerometer was calibrated correctly and some where it looks all wrong. Here's a good one: http://i.imgur.com/USrv4an.png h...

"Named data"?