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Topics - MurrayPeterson

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SASC Events / Videos from a Miata
« on: June 19, 2017, 12:43:53 AM »
Sunday AM (unedited):
Sunday PM (unedited):

Chrome apparently likes to play them in low res.  If you want full 1280x720 resolution, right click, save to disk, and play with VLC or some other useful video player.

SASC Events / June 18, 2017 WCMA scores
« on: June 18, 2017, 06:53:16 PM »
Scores for June 18, 2017 at YYC:

The Alberta drivers successfully held off the Winnipeg invasion today :)

BTW, the Day 1, Set 3 runs are all of the fun runs.

SASC Events / June 17, 2017 WCMA regional scores
« on: June 17, 2017, 05:40:03 PM »
Scores for the day:

Updated championship overall scores:

The Winnipeg "crowd" did very well today, although Cam and Ryan held them at bay :)

SASC Events / June 10 practise and June 11 event scores
« on: June 11, 2017, 05:37:29 PM »
Practise scores (rain all day, so the FWD/AWD people had much fun):

June 11 championship event scores (cloudy/sunny all day):

Updated overall scores:

SASC Events / Updated overall scores
« on: June 05, 2017, 06:46:14 AM »
Chris sent me the Red Deer data (thanks!), so here are the updated overall scores:

SASC Events / June 4 Fort Macleod scores
« on: June 04, 2017, 07:31:46 PM »
Today's scores:

Today was scored as the best run of the first 3 runs.  The timing gear got smacked early in the afternoon, and unfortunately, the backup gear failed to function.  I do apologize for this; I obviously didn't test it recently enough :(

Updated overall scores:

The overall scores do not yet have the Red Deer results, but I will get them out as soon as I get the data from Chris.

SASC Events / Scores for May 14, 2017 Championship event at YYC
« on: May 14, 2017, 04:58:23 PM »
Sum of morning plus afternoon:

Overall scores to date:

It was a glorious day, with an unbelievable amount of luck WRT the rain.  Rain all around us, and nothing on our heads!

Technical Talk / New radios
« on: May 01, 2017, 05:04:33 PM »
I tried an experiment with the new Motorola radios (the small green ones) this weekend, and did not charge them on Saturday night.  I did this because I know that the older Midlands would last 2 days with no problem, and the new ones have a bigger battery (800 mAh for new ones, 700 mAh for old ones).

They lasted fine, but I have to admit that they are a pain in the butt.  They start complaining about a low battery within 30 minutes of being turned on, even after a full charge.  And some of them turn themselves off for the same reason, but if you turn them back on, they then show 50% battery.  Not what I expected from a Motorola product.  The one in the timing trailer did the same thing (turned itself off), and I had replaced the OEM battery pack with a 2300 mAh unit, so it's not a problem with the batteries.

So, what should we do now?  They are functional, and last for 2 days without a charge, but it sure would be nice if we could find something that works without beeping at you constantly.

SASC Events / Scores for April 29/30 events at Fort MAcleod
« on: April 30, 2017, 07:26:45 PM »
Practise course scores:

Sunday championship scores:

Sunday was quite exciting.  Multiple people help the lead during the day (Tom G, Richard B, Stephen H), but Cam ignored his cone penalties and drove home for the win.  Congrats to Cam (and everyone else) for some really nice driving!

I also have to give special mention to James C, in an EP Civic that still managed 10th place in PAX.  Impressive!

Other Events / 3 day event in Great Falls
« on: April 19, 2017, 09:32:46 PM »
I know it conflicts with one of our championship events, but Great Falls is going to be holding a 3 day event (May 27, 28, 29) at the Montana Expo Park in Great Falls.  That's a serious racing weekend!

SASC Events / Scores for April 16 practise event at YYC
« on: April 16, 2017, 06:20:43 PM »
Morning only:

Afternoon only:

Best run of morning plus best run of afternoon:

Weather turned out much nicer than expected, and we got cars through fast enough to get 9 "official" runs each plus fun runs.

For those that wondered -- the new Miata is amazing at some things (turn-in specifically), but still transitions into some pretty bad understeer in mid corner.  Softer sway bar settings will be the next tuning item.

SASC Events / Timing equipment transport for 2017
« on: March 25, 2017, 04:43:21 PM »
Our new Miata is too small to carry the timing gear to events, so we now need volunteers to carry it to/from our out of town events.  For events at YYC, Jo and I are willing to take our Mazda3 as the gear hauler and also serve as a timing vehicle.

So, we need a volunteer for carrying the timing gear to/from Fort Macleod on April 29/30.  If you wish to pick it up from our place (Woodbine in SW Calgary) and drop it back off there, I will continue to keep the equipment charged and maintained.

Technical Talk / New project?
« on: March 20, 2017, 10:30:46 PM »
As most of you know, I have quite a technical "bent", and like to apply science to most things.

I just finished reading Neal Tovsen's blog article, and it brings to mind some deficiencies in the current data logging and analysis tools.  In particular, how close to the limit are you really driving?  Or in other words, are you under-driving or over-driving?  GPS and OBDII sensors just don't come close to answering this question, and I think it is possible (although very difficult) to do better.

So, what I am proposing is to mount an accelerometer and gyroscope on the front or rear of a car, and log some high speed measurements (perhaps 1000 samples per second?).

That's the easy part.  The hard part is going to be doing the math to deal with all of the sensor's readings and then decide what constitutes "at the limit" on any given run.  If I am very lucky, I can discover patterns that indicate tire break-away.  At worst, I guess I will know a lot more about matrix math and Euler angles than I do now :)

Does this sound like a worthwhile endeavour?  Or do the current GPS logging and analysis tools give you everything you need?

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