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clinehall · **Posted:** Thu Mar 20, 2008 4:55 pm

jimpastorius wrote:

One screw up and I was going for wild ride down the hill.

:hyper2:

That's what Cheryl said! :twisted:

Donnie Barnes · **Posted:** Thu Mar 20, 2008 4:59 pm

jimpastorius wrote:

Why do you guys keep bringing this up a week before a race :shock:

Mostly because we know it will scare the bejeezus out of you.

Seriously, you know when you're definitely not going to make T10 and if you choose THEN to drive off the track to the inside, you should be fine. You're going to hit the outside wall or possibly the hole I mentioned above only if you keep trying to save a situation that you shouldn't be.

Anyone else doing the Oak Tree National? I should be there in the SM.

--Donnie

Ron Spencer · **Posted:** Thu Mar 20, 2008 9:41 pm

Donnie I actually have VERY good video showing the hole. I went 2 WAY off in turn 10. Stayed in it and no drama but the grate in that hole was there but quite a ways down the hill and about a car width off. Certainly you WANT to miss it.

And Donnie if you are describing that Porsche that went 2 off out of 10 in a race last year that had the front right torn off I don't think he went that far off or that far down the hill. I watched the replay a couple times and it seemed like VIR had left a nice pile of dirt just (and I mean just ) off the right edge of the track. He hit it and was done. VIR should KNOW better then to have had that there.

Ron

Donnie Barnes · **Posted:** Fri Mar 21, 2008 8:44 am

Ron, that wasn't the incident I was referring to. The one I saw was at a Club Member day, and it was someone in what appeared to be a pretty nicely prepared old Camaro or something. They red flagged us and as we came around his car was still pretty much wedged in that hole and later when I saw it you could tell he had lost most of that right front suspension.

That drainage grate is just too deep down in the hole. I've always felt that was something VIR could and should fix, too.

--Donnie

Kevin Butler · **Posted:** Mon Mar 24, 2008 10:44 am

I got around to looking at my Traqmate data a little this weekend. My fastest TT lap was a 2:21.124. The lap I put 2 wheels off in T10 was a 2:20.342.

Looking closer at the T10 segment, there was only a .3 second difference between the time spent in T10 in the fastest and slowest segments in that particular session. The 2:20.342 was the fastest T10 segment of the session.

The quicker T10 segment had entry speed of 89 mph with an exit speed of 96 mph. The slower one had entry speed of 86 mph with an exit speed of 93 mph.

It doesn't look like you loose that much by being conservative one time, but when multiple similar kinds of turns are present, it will add up fast. Not to mention the effect when multiple laps count as well.

Matt Nicholson · **Posted:** Mon Mar 24, 2008 12:07 pm

.3 of a second is alot of time. How much $$$ do race teams spend in search of .3 seconds/lap? Over the course of a race, .3 sec/lap = welcome to 5th place....

Kevin Harvey · **Posted:** Mon Mar 24, 2008 12:08 pm

Kevin,

I know Miata's are good on gas, but is that 86 miles per gallon in T10???

LOL, just playing.

Vincent Keene · **Posted:** Mon Mar 24, 2008 12:20 pm

Kevin Harvey wrote:

Kevin,

I know Miata's are good on gas, but is that 86 miles per gallon in T10???

LOL, just playing.

I want to know how he can gain 7 MPH in that turn from entry to exit.

Ryan Holton · **Posted:** Mon Mar 24, 2008 12:45 pm

Vincent Keene wrote:

I want to know how he can gain 7 MPH in that turn from entry to exit.

Marty Howard · **Posted:** Mon Mar 24, 2008 1:01 pm

steve remchak · **Posted:** Mon Mar 24, 2008 1:14 pm

Vincent Keene wrote:

Kevin Harvey wrote:

Kevin,

I know Miata's are good on gas, but is that 86 miles per gallon in T10???

LOL, just playing.

I want to know how he can gain 7 MPH in that turn from entry to exit.

wind that rubber band a little tighter VK!!!!!!!!

Kevin Butler · **Posted:** Mon Mar 24, 2008 1:23 pm

Kevin Harvey wrote:

... is that 86 miles per gallon in T10???

Doh! Fixed that.

In Traqmate, I defined T10 from an avg point where I stopped slowing down for it to were I stopped accelerating to start braking for T11. It's one continuous acceleration zone.

So that's from where you get on the gas entering Southbend to about halfway up the hill on the approach to Oak Tree where you start braking.

Vincent Keene · **Posted:** Mon Mar 24, 2008 10:13 pm

Kevin Butler wrote:

Kevin Harvey wrote:

... is that 86 miles per gallon in T10???

Doh! Fixed that.

In Traqmate, I defined T10 from an avg point where I stopped slowing down for it to were I stopped accelerating to start braking for T11. It's one continuous acceleration zone.

So that's from where you get on the gas entering Southbend to about halfway up the hill on the approach to Oak Tree where you start braking.

So your "exit" for Oak Tree is the top of the hill at the braking zone? :roll:

Kevin Butler · **Posted:** Mon Mar 24, 2008 11:16 pm

You mean my exit for Southbend, not Oak Tree, right?

Yeah, it's one continuous acceleration zone. I guess you could try to create the segments based on geometry, like tangent points at the end of a curve, but it would be a lot harder. Besides, what you're trying to analyze is speed entry/exit at zones of acceleration and deceleration.

There aren't any maps, per se, that you get with track mate. They're created by your lines. I haven't seen any track maps posted on Traqmate's site, nor have I had an opportunity to try to create any. That would require driving the track slowly for 2 laps, one per side, and then somehow saving it to integrate it into the new data you record. Err...I'm not there yet (if the above is possible).

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