SR3 Oval Track Day Report, NASCAR MADness Series Preview

Thank you to all those who showed up for the second Track Day on SR3. We didn’t do any racing but we ran a whole bunch of laps and tested/tuned a few IROC sets to support the upcoming series.

We had a few new drivers show up to check out slot car racing also. Another neighbor, Jared Johnson, stopped by and ran a whole bunch of laps on the oval along with his two kids, Madeline and Mathew. Mathew is only about 2-3 years old but he managed to click off a whole bunch of laps. Madeline clicked off over 600 laps and always wanted to go faster. We’ll have to get the other neighbor kids and my grandsons over for a “Kids Race” sometime.

New driver, Jerry Pearson, made his second visit to SR3 and cut quite a few laps with various loaner cars.  Jerry informed us he is planning to build a 4-lane Tomy sectional track soon.  Sounds like Jerry’s interest is solid so hope to see him racing with us soon.

We did experience a technical glitch when three lanes suddenly lost power. Appeared to be one of the two Phidget 0/0/4 relay boards losing communication with the computer and had to be reconnected.  Obviously need to investigate that and make sure it doesn’t happen again.

Round 1 of our new NASCAR MADness Series is on for next Saturday, May 28, 2022.

Round 1 will feature one “extended” race using the PR-5 “Lite” platform with a NASCAR-style hardbody, expect 50-lap segments and two full rotations for a 300-lap fuel event.

The track layout will be the SR3 Oval course as shown.

When: Saturday, May 28, 2022

Event Schedule:

10:00 – Gates open, track power on, open practice.
11:15 – Drivers Meeting/Announcements.
11:30 – Racing Begins (30-lap heats, fuel):

Race 1: Tyco 440-X2 Wide-Pan NASCAR Hardbody (IROC) 15v
Race 2: OS3 TFX “Lites” NASCAR bodies (if available)  18v (♣)
Race 3: Viper-Jet “NASCAR Lexan” 12v (♣)

Lunch Break

Qualifying: one warmup lap, then three laps under green. Average time of the three laps. The fast qualifier starts on the pole for the feature race.

Race 4: Jag Hobbies PR-5 NASCAR “Lites” 16.5v ***
Race 5: Jag Hobbies NC-2 NASCAR “Lites” 15v
Race 6: Tyco 440-X2 Wide-Pan NASCAR Hardbody 15v (Tomahawk rules)

♣ Denotes Concourse d’ Elegance Points
*** Denotes “Extended” Feature Race

Please RSVP for Round 1 here.

Okay, shut up and drive!

 

SR3 Construction Update: March 1, 2022

Progress continues on Stewart Raceway III but it has been slowed by all those pesky things that seem more important at the time.

So, where are things? Well, the table and track roadway placement has been completed. The track power distribution system is complete and tested. While there are still technical hurdles to overcome, the goal of supporting different voltage levels for each lane–by the driver–has been achieved. It’s not completely ready, but drivers can select any voltage they’d like to run when testing or practicing. This means you can practice/test any car, at any voltage, at any time racing is not underway. Think about that…you no longer have to restrict yourself to 15v, 12v, 20v, or whatever. You can go to any open lane, set the “lane” voltage (at the driver station), and run your car.

This is significant and very important for maximizing track/testing time. You no longer have to find out what the track voltage is set at to decide what car you're going to run. You simply set the lane voltage to whatever you want.

Other than six lanes, and a much larger layout, SR3 is expected to support the same racing features that SR2 supports. One small difference will be a slight increase in pit spacing. SR3’s dual gantries will be spread slightly further apart to compensate for the higher pit entry speeds.

Lots of work remains but mostly tedious wiring, track section power connections, crash barriers, etc. After that, it’s all about software configuration and testing.

Power distribution under the main straight timing/pit gantries.

One huge difference between SR3 and SR2 is power taps. Brad Bowman insists that I can run just one power tap, at most two (SR2 has eight power taps). I’m not convinced just yet but I’ll start testing with just two to validate that. The track design of being able to convert sections and convert to an oval makes the usual power tap calculations more difficult. No biggy though, adding more power taps just costs more time and money.

So, SR3 is coming along nicely. My garage is a complete disaster but the new track is going to be quite cool. Yea, lots more work to do, but it’s getting close. Really only need to wire the gantries up and I can start testing things. The 6-lane, dual gantry setup adds some complexity and delay. I had planned to just use the usual RJ-45 twisted-pair cable to handle that but RJ-45 only provides 4-pair, which doesn’t quite handle a 6-lane dual gantry setup (need 6-pair x2). Yea, yea, I could make it work but decided to find some 6-pair cable to handle this.  Sadly, it’ll take a week or so to arrive.

Then the challenge will be shielding the cable. Shielded 12-conductor cable is extremely expensive. In fact, way too expensive. Yes, some of the noisier cars can trigger false laps if the gantry wires are overly exposed to RF/EMI frequencies.

Can’t wait to get all the infrastructure completed and start running some laps on this beast.

Concourse d` Elegance Competition

Beautifully prepared TFX IROC set courtesy of George Peters

Just a reminder that we’re going to have a Concourse d` Elegance trophy awarded at the end of the current Formula “e” Series.

Actually going to have two awards: An individual car winner; and an IROC “car set” winner. Hope this motivates some to bring some cool IROC sets to the final race.

George is leading in points for the IROC set award after presenting the bodies for the Round 2 TFX “Lites” race.

Round 3 is this Saturday, January 29, at 10:00AM. Register now!

 

SR3 Update: Elevations and Banking Set

Yep, the initial setup is done. Of course, all adjustable at any time but this is what we’ll open SR3 with. Pictures don’t really do it justice. You can see it in person at Round 3 of the 2022 Formula “e” Series, January 29.

Right-click and open in a new browser tab for full-size images. The entrance to Turn 1 (oval).

 

The road course.
Down-slope, off-camber exit from Turn 4. No slam-dunk getting to the finish line here.

Lower banking on entrance to Turn 1 (oval) and higher banking on Turn 2 exit. A little bump in the middle of the corner to make things more interesting for all types of cars.

No idea how this setup will work with the various cars we run, we’ll sort it out.

Plenty of work left to do, including completely securing each track piece to the table. This becomes more important in the summer season when the heat tends to expand the Sintra roadway material. I’ll likely end up securing each piece every 8″ or so.

Once I get all the pieces secured, it’s time to get going on the wiring, which is always a challenge when you use multiple RMS (timing system) setups. While I was leaning towards abandoning SlotTrak due to their recent crazy mandatory hardware upgrade, I decided to invest in that hardware upgrade for SR3 to try it out.

SR3 also has some new features that require a completely different track wiring design. I won’t go into the details here but the plan is to be able to change the voltage for each lane at the driver’s station (and computer). This supports drivers to test different cars at whatever voltage they like while also permitting the Race Director to reset the lane voltages at race time. It’s complicated but the hope is that it benefits driver/team track time by allowing practice sessions of virtually any type of car on the track at the same time. Yea, a bit sketchy but much more productive track/testing days.

Don’t forget! Round 3 of the Formula “e” Series is Saturday, January 29, 2022. Get registered now!

Okay, shut up and drive!

 

Houston, We Have Liftoff!

Right-click any image to open full size.

Woohoo! SR3 lifted off from the construction pad today at 4:26PM, Tuesday, December 28, 2021.  The launch was flawless and SR3 remained lifted for over an hour without issue.

I really wasn’t sure the system would lift this beast of a table but it seemed to be plenty powerful enough and didn’t seem to bog down with the new load at all. Of course, there’s a lot more to add to the table, including the track, wiring, electronics, and power supplies. Given there didn’t appear to be any stress on the system the only modifications I’ll add are extra horizontal and vertical bracing to the garage joists and some sort of safety straps to prevent a pulley mount from failing. Yea, I didn’t do that with SR2 but this beast makes me nervous to get under for any length of time.

Next step after the safety system is to clean up the table and touch up the paint job. Then it’s time to lay down the precious Bowman track sections, oval layout first.

Hope to see you at the  Formula “e” Series Opener January 1, 2022. Please register for the event today!

Okay, shut-up and drive!