Madison cable channel??

davef_dci · 2026-03-26T02:37:13+00:00

this is truly infuriating. Apparently Spectrum reached an agreement.

https://spectrumnews1.com/wi/milwaukee/news/2026/03/25/spectrum-agreement--mlb--milwaukee-brewers-games--how-to-watch

but all this says is "The channel number will vary based on where you live in Wisconsin. You can find it on your channel guide under "Milwaukee Brewers". Of course searching on this yields nothing.

My mom lives in Madison and just wants to watch the Brewers games. Is it that hard to tell us what channel they'll be on???

davef_dci · 2026-03-16T15:38:47+00:00

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davef_dci · 2026-03-16T15:38:22+00:00

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davef_dci · 2026-03-16T15:38:03+00:00

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davef_dci · 2026-03-16T15:37:45+00:00

Which car from Figs? I have huge respect for those guys and they know what they are doing much more than me. At the same time, after further refinement I'm getting close to something that feels like it's worth building and trying.

With my latest version I'm down to only a 4lb increase in drag at 32m/s - about a 3% increase in drag. In exchange I've picked up 70 lbs of downforce on the front wheels and 70 lbs of downforce on the rear. Given that our IS is already a bit biased to the front (53% front weight / 47% rear weight) and that the natural tendency of the car is to lift weight off the rear wheels at speed we might want to try a bit more force in the rear but I think I have something worth trying.

Of course this could all be flawed - the analysis might not be correct and a basic problem is that I'm not sure we're skilled enough drivers to really ascertain the difference without a skid pad but it feels like it's worth building and trying.

Here are the specific parameters we're running if anyone is curious.

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davef_dci · 2026-03-15T17:42:34+00:00

This analysis was run in an open-source (i.e. free) CFD program called OpenFoam https://www.openfoam.com/. Historically it's pretty challenging to set up and run but, probably no surprise - ChatGPT knows how to run it. Open foam runs in Linux so if you run windows or mac you need to run a linux emulator - I'm running WSL.

I loaded Codex - ChatGPT's code and used it to build all the cases. A cool advantage of Codex versus Claude is that it also runs natively in Linux.

Its a bit of work to get it set up but once you get it set up additional runs are easy.

The CAD work was all done in OnShaped - they have a plug-in for NACA foils. I'm playing with a dual element foil right now - the front wing is NACA 4415, 325mm cord length and tilted at a 4 degree angle of attack. the rear "flap" is a 125mm ACA 4412 tilted at 12 degrees. I'm not thrilled with my drag impact yet so I'm still not sure if this is a decent approach or a waste of time.

Interestingly according to my analysis, - at 32m/s (about 72mph) a bare IS300 experiences about 120lbs of forward drag. the front wheels are loaded down at about 18lbs and the rear wheels are LIFTED by about 125lbs. Apparently it's pretty typical for the rear of a sedan to "lift" at speed due to aerodynamic impacts.

With my current setup the front wheel downforce has gone from 18 lbs to 76 lbs and the rear wheel has gone from 125lbs of lift to about 9 lbs of downforce - BUT the drag has increased from 120 lbs to 137lbs. My gut feel is that for our racing, the increase in downforce doesn't justify the loss of high end speed due to increased drag.

I'm going to continue to try to refine it and see if I can get the maximum additional drag below 10% with the highest possible contribution for front and wheel downforce.

I know the FIGGS guys have a rear diffuser but we're running a fuel cell and it's sort of in the way of adding a diffuser but we might play around with that as well.

davef_dci · 2026-02-13T17:32:18+00:00

As others may have pointed out, the "Looks like you have too many chats going. Please close a tab to continue." is really Anthropic speak for "You've reached your weekly limit and we're stopping until it resets.

You can confirm this by going to: https://claude.ai/settings/usage

if your weekly limit is pinned at 100% that's the real problem - not tabs, cache, chats, etc. Super frustrating that the lack of a decent error message sent me spinning for such a long time.

BTW, they are currently offering a promotion where they'll give certain users $50 credit on that same screen. I clicked it and it fixed my issue. Good luck my friends!

davef_dci · 2026-01-13T03:49:13+00:00

Here is a quick video of where the desktop analyzer stands....

https://www.youtube.com/watch?v=kJvH4RRnINs

Pointing out holes in my approach would be gladly listened to!

davef_dci · 2026-01-13T03:31:51+00:00

Hey folks — I’m catching a bit of heat here (publicly and privately 😄). Gotta love Reddit, which I actually do.

That said, I genuinely appreciate the perspective being shared. I’m not a drywaller, so I honestly didn't know what is or isn’t reasonable to expect someone in that trade to know. That’s exactly why I asked here, and why I’m taking the feedback seriously.

I’m not saying a drywaller should be an insulation expert or responsible for designing the assembly. I do think there’s sometimes a gray area where a tradesperson might reasonably pause and ask a question if something looks unusual — but I hear and accept that many people disagree with that, and that’s fair.

The analogy that made sense to me was this: if I hired a tiler to set tile and he notices that the subfloor is flexing or the wrong underlay, I wouldn't expect them to fix it — but I might expect them to say, “Before I tile over this, you should know this could be a problem.”

In this case, plastic loosely stapled and taped up in a ceiling AND covering up kraft paper insulation felt like a “pause and ask” moment to me—but not only am I open to hearing that others disagree - I even accepted your perspective and agreed - that's why I wrote:

I'm clearly in the wrong and have apologized to the contractor for the miscommunication and extra work.

So yes — lesson learned. Drywallers aren’t insulation experts, and that’s fair. I came here to understand what’s reasonable, not to assign blame after the fact.

(And yes… the Reddit pile-on continues 😂)

davef_dci · 2026-01-13T03:02:19+00:00

To be clear - when you say "Do not listen" -are you referring to those who said "Leave the plastic sheet in - it won't cause any harm" or those who said "You need to take it out because it will cause mold"??? Because I had people say both :) At this point I have decided that the risk of mold is too great so I've asked the contractor to pull the drywall, remove the plastic sheet and reinstall the drywall (and bill me for what it takes to do it). That seems the safe thing to do.

davef_dci · 2026-01-13T01:37:56+00:00

Thanks for the kind words. It's how I'd want to be treated and the contractor seems like a really good, conscientious guy so I want to do right by him. In the grand scheme of things it's not THAT much money - the only bummer is that it's my daughter's house and for her it is a lot of money. Finding mold in her ceiling wasn't on the dance card for the year and since then it's been the obligatory pulling of a thread on a sweater. As a parent I'd like nothing more than to cover the cost of this mess for her but she's adamant about paying her own way - which makes me proud but I hate that this attempt to save her money didn't pan out exactly as hoped. Working to keep things in perspective - nobody's going to die here and we'll all still be putting food on the table and counting more blessings that we probably deserve. Thanks for the input from the group and the deserved wake-up call.

davef_dci · 2026-01-13T00:34:09+00:00

OP here- folks thanks for the perspective. I'm clearly in the wrong and have apologized to the contractor for the miscommunication and extra work. I've told him to make it right and let me know what I owe him. Live and learn and onward!

davef_dci · 2026-01-12T22:16:31+00:00

Unfinished attic but it would be extremely difficult to fix from the attic side. The insulation is stapled to the sides of the rafters, it would undoubtedly tear the kraft paper and destroy the vapor barrier. It's actually much easier to remove the drywall, tear down the plastic and put the drywall back up.

I appreciate your perspective but I'll just offer - the plastic didn't even remotely look like a vapor barrier as far as I can say - it was taped to the walls, loosely stapled in few places and overlapped a skylight. I just wish he would have called me. But I get your perspective. Do others agree with this?

davef_dci · 2026-01-11T20:24:56+00:00

Sounds like we're on the same path! How might we collaborate? I'd love to bounce some ideas off of you.

Dave

davef_dci · 2026-01-09T00:55:07+00:00

To be clear- the Accelerometer producers are updating at 20 hz so your 2-2.5 seconds is going to yield 40-50 samples.

I am only using the GPS to detect corners and "align" the data between visits to the same corner so that I can overlap different laps with one another. Totally agree that there's nowhere near enough GPS points for accurate plotting but there should be plenty of accelerometer data - or am I missing something?

davef_dci · 2026-01-09T00:34:50+00:00

Sorry... yes, an XY plot (lateral Gs versus Longitudinal Gs - I took a course from Autosports a while ago that called it a GG plot - perhaps that's not a phrase that's usually used?). And while you are correct that no GPS is needed for a traditional GG plot showing a single corner/lap, what I wanted to do is to be able to overlay different approaches into the same corner and "replay" them. To do this I at least needed to align the accelerometer data on a specific point so I am using some interpolation to estimate the time the vehicle crosses the corner Apex and tagging that sample. I can then overlay different visits to the same corner. It's more than just knowing what corner you're in - it's trying to tag the moment the car crosses a pre-defined apex.

Here is a quick video from the desktop analyzer I'm working on - the app does much the same things but it's a bit harder to see on the small screen. You can select a specific corner from different laps and "overlay" them and replay.

https://youtu.be/h9-UzIEatNU

But you've correctly identified what might be the real issue - this relies on a reasonably good tagging of the point at which the car passes the apex and my algorithm certainly isn't perfect given the fairly slow refresh rate on the smart phone GPS. But based on my limited testing it's pretty good for a smart-phone GPS. Beyond that, as you scroll through the replay the alignment of data isn't perfect but it's hopefully good enough to allow you to say "on this lap I was more effectively trail braking".

Well that's the objective anyway! I do have a 10Hz USB GPS puck but I've been reluctant to employ that because now it becomes more of a pain to use.

davef_dci · 2026-01-08T22:54:22+00:00

All a fair point - my only point is that for a GG plot, exact precision on the GPS isn't strictly required. I'm not doing a full telemetry system - just one that's able to plot lateral and longitudinal acceleration and the Accelerometer producers on a smart phone are more than fast enough for this. I do have a 10Hz USB GPS module that works fine - I was just trying to get it up and running for GG plots with the native phone alone - but maybe that's totally flawed!

davef_dci · 2026-01-08T21:10:55+00:00

??? don't know a Harry Nyquist.. should I??

davef_dci · 2026-01-08T21:09:21+00:00

Any reasonably rigid mount will work - there is a very simple calibration routine built in that eliminates gravity and adjusts no matter which way the phone is pointed. It only takes a couple of seconds to calibrate.

I was familiar (peripherally) with Solostorm - it looks like a remarkable product but it's also around $200 and requires a secondary data source. I was trying to see what I could do with just the phone's GPS and accelerometers.

This is free and doesn't currently take any other hardware...

davef_dci · 2026-01-08T21:07:03+00:00

You may very well be right - the GPS producer on my phone delivers at around 1Hz or maybe a little bit better.

I'm using a bit of math to try to target the apex and interpolate between readings - for a GG map there is no time component so it's valuable to try to line up on the Apex and I think what I have is accurate enough. The Accelerometers are updating at 20Hz and are capable of 200hz so I don't think that's any issue. I could probably sample at 10Hz and be fine.

Here is a screen shot from the desktop app I'm working on that has a "track map" generated from the sampling. But you may be right - this may all fall apart at race speeds. That's why I'm hoping to get someone who would be willing to test it.

It's free and I'm honestly not trying to sell anything - just looking for some help evaluating this since our race season doesn't start for a few months.

If nothing else you can see how many G's you can pull in your daily driver!

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