Tag Archives: tgs2

I was working and then I couldn’t sleep

OK first things first and then PICTURES! I did what I said I would do, cut the floor for the scale mockup of the TGS2. When I got done with that I couldn’t get the brain to shut down, even with chemical assistance, until after 0800. Then I woke up at 1100. 1200, and 1400 when I got up and said the heck with it. So if this seems a little less coherent than usual you can blame lack of sleep. Or something.

So anyway work. I laid out and cut the floor for the scale mockup TGS2 last night, measuring to the thousandth, marking and cutting to the hundredth of an inch. In scale that’s measuring to the 1/32″ and cutting to the 1/4″. Here is what it looked like after laying out the front wheel cutouts.
Yes the cutouts were rectilinear, sue me. Aero over looks
I decided to go with a straight leading edge on the floor for more downforce, even though the curved cutout looked better. It turns out the curved cutouts induced attached vortices that reduced airflow under the floor which in turn reduced downforce. I may cut back the strakes between the nose and the rest of the floor for the same reason, they may induce an attached vortex. Or they may prevent detached flow under the floor which would seriously reduce downforce. That’s why we make mockups.

Here’s the rear wheel cutouts.
More confusing lines on stiff paper stock.

And the cut version.
With the parts that aren't supposed to be there removed

And with the bucket from the Mini Sprint-T resting on the floor.
Now you know what that extra line was for
You can see why I can’t use the Mini Sprint-T bucket for the TGS2 mockup, I already installed the windshield.

And the view from behind.
I would say this is what the competition sees, but since the competition has to wait until I get off the course to run, not so much
I expect this to be a popular view of the car.

And for perspective with one of the kit wheels and the tires I’m not using on the Mini Sprint-T.
Right diameter but wrong width.
Sticking way out there because wrong width. In case you were wondering I was going to build the old school hot rod version of the kit with these tires.
Yep, sticking waaayyyy out there.
Showing the position of the outer edge of the tire.
This is how the inside is supposed to fit
And how close the inner edge is supposed to be. This is still much further out than most T-buckets run their rear tires. Some are so close the inside sidewall rubs the body in hard turns.

The pictures with the tires showed the approximate ground clearance when racing, thanks to the stock Model T tires in the kit. Fortunately 4 pennies stacked is the correct thickness to portray the street clearance.
Hard to see how much higher this is off the ground, but it's like twice as high as race trim
Unfortunately I don’t have a tripod to show exactly how much higher this is.

And I have put about 4 hours in on this, time to put it (and me?) to bed.

Still working on the spindles

I spent hours working on one bushing last night and it still won’t take the kingpin. It’s getting close but won’t let me slide the pin through the bushing, and I have 3 more bushings to go after I finish that one. Either the stones are worn out or these are very hard brass bushings. I think they are actually bronze rather than brass, but still, not supposed to be that hard. I was using cutting oil and everything so unless the stones are worn out already from the axle boss I’m at a loss.

Moving on to the scale mockup TGS2 I found some more card stock to use for the floor. There was an expired TGIFriday mailer under my computer that was printed on extra thick stock. I have revised the clearance cutout for the front tires, so now all I have to do is find time to cut it out. I think if I skip a day blogging I’ll have the time to do a couple of floors, maybe?

I’m going to have to switch to my backup scale bucket body because I have already modified my first one to build the Mini Sprint-T. That means I have to open the chopped T-Coupe rod model. I really haven’t decided what I want to build from that one. There are so many choices… And I have really no time to build models. Models from boxed kits that is, mockup models are required for, reasons.

And because I need to get to work on something I’m closing this one down now.

I did stuff now I can write about stuff

OK first and foremost I finally installed the bushings in the spindles. I spent hours pounding on that last bushing, but I finally got it (mostly) in place.
See the brassy looking stuff? That's a bushing

Now the fun part is going to be honing those bushings until the kingpin just barely falls into them when I carefully insert it from the top. Actually it should be falls from the top smoothly through the bottom, but let’s not be looking for miracles here. If it lines up so the kingpin rotates in both bushings at the same time I will be satisfied. I was just thinking maybe I should have made a few quick passes with the hone on the kingpin holes in the spindles but hindsight is better than 20/20. That reminds me, I need to hang on to my 2020 party shades when the time gets here. I finally had to resort to my 8 pound engineering hammer to brute force the bushing in place, where the other 3 finessed in using the 32 oz. ball peen hammer, thereby confirming the adage “If at first it doesn’t fit, get a bigger hammer!”

I think I mentioned a while back I was playing Shadowrun as a repaired and idealized version of my future self (age 129). The main difference is when they fitted my cyberlegs I requested they be proportioned like the Vitruvian Man.The Ideal proportions for the Human Male
So my character is now 6’7″ instead of 5’8″. (My neck got fixed while I was in traction for the hips to heal, too) I have a shotgun/slug gun in my left arm, and I can swap out a 4 round internal magazine for a 16 round external replaceable magazine in less than 5 minutes, and reload with a spare magazine in 2 seconds. The arm gun fires 20mm slugs or flechette rounds in-game. If I was to have such a thing IRL I would use a Military Buckshot load of 00 and 4 Buckshot, because 1) flechette rounds have lousy terminal ballistics and 2) flechettes tear up the barrel, even in a cup wad. Don’t believe me? Search YouTube for Taofledermaus flechette and look what carefully loaded flechette loads did to his gun.It ain’t pretty.

And I have to get up semi-early tomorrow to start honing those bushings, so time to post and shut down for the night.

Quick note before I go work on the car in the living room

And yes there is a car in the living room but that’s not what I’m going to work on. I’m going to install the bushings in the spindles and hone them to fit the kingpins. But first I have a needy cat on my lap who wants belly rubs so brief break.

OK belly rub needs satisfied, back to the blog post.

The concept is simple, the kit ships with bronze bushings that press into the spindles and have to be fitted to the kingpins, similar to how the axle bosses had to be fitted so the kingpins would go in and out of the axle. The difference here is the kingpins are locked into the axle with the grub screw while the bushings have to be honed for working clearance, the size difference is only a few thousandths of an inch (0.03-0.06 mm). There just needs to be enough room for a layer of heavy grease in the bushings where the axle bosses didn’t need any room at all.

Enough words time for work.

This just ain’t my week

Yesterday was grocery day where I discovered all my money is in the wrong accounts and I didn’t have anything spendable at the grocery store. Fortunately my son was able to cover the <$20 tab so we could get out. I did manage to grab the last $0.50 pumpkin pie. I'm not pulling your leg, there was a 9" frozen pumpkin pie for 4 bits on my preferred shopper card.

Outside of the grocery store I’m having a shingles outbreak on my left arm, lots of itchy little blisters on my forearm. Also I’m dealing with an allergy attack that kept me awake all night when I couldn’t find the allergy/sleeping pills, so I’m on my 28th hour of semi-wakefulness. My biggest problem is itchy burning eyes, which is also my normal “Hey, Dummy, get some sleep” body response.

On the TGS2 mockup I’m still not happy with the way the layout of the cutouts for the front wheels has been going. The good thing is I just need to get the shape of this floor piece right and tack some wheels on it than tack the bucket on it and the cover on top of the body and it’s picture-taking time. Making the front fenders will be fun so you can see what I have been looking at in my mind’s eye. I’m still debating if I should completely enclose the back of the fender or leave it open for less drag. I don’t know which way will actually have less drag so I’m making both styles and doing A-B-A testing for gas mileage to determine lowest drag by seeing which one has the highest highway mileage. Lacking a wind tunnel or access to a long straight for top speed testing this is the best method I have to determine comparative drag.

I’m on my third car race of the day on the idiot box, Global Rallycross, which followed the 350 lap Indycar race from Iowa, which followed the Indy Lights race from Iowa. I was in bed trying to sleep during the Austrian F1 Gran Prix telecast. Of the 4 kinds of racing the Lights cars are closest in appearance to the TGS2 simply because of the expansive floor pan in front of the rear tires. Of the 4 kinds of racing my preference is the Indy Car, I mostly watch F1 for design inspiration, the Lights are the guys I will probably see in Indycar in future seasons, and the GRC are a bunch of guys getting dirty and sideways that looks like a lot of fun.

And I need to go to bed now before I faceplant into the keyboard again.

The fur kids are starting to miss Mrs. the Poet, Happy 4th of July

Clint and Clyde have noticed that Mrs. The Poet isn’t here to sit on, on the couch. Actually I think they noticed she isn’t here to wait on them hand and foot.

I’m running out of paper cardstock for the scale mockup because we have recycled so much of our junk mail there was only one small sheet left, so when I screwed up the front wheel cutouts for the floor there wasn’t enough left to do another one. And now I won’t get any of that kind of junk mail again for a long time, because I actually want some.

I could make mockup tires from 1″ dowels sliced and painted black. The IRL tires I’m looking at are all 25 to 26″ tall which is 1″ to 1.04″ in scale, and 7″ to 12″ wide which is 0.28″ to 0.48″ in scale. Doweling is cheap and easy to work with, so that might be the tire solution, cut them slightly wide and then sand them to the correct width.

I need to get my act together this morning and get to Harbor Freight for their 4th sale. Mrs. the Poet wants me to get a screwdriver set because I left mine where I was working out in the garage and people have been moving things around and just putting my stuff anywhere in spite of repeated admonitions to not move anything so I could find it again. But nobody pays me any attention when I ask to leave my stuff alone.

Anyway I need to do a lot of travelling locally today so I had better get a quick nap in before I have to go.

Random thoughts and observations

Mrs. the Poet wants a song about Clint sitting on top of the refrigerator. I’m setting it to the tune of “Stairway to Heaven”. It is going to be anti refrigerator-sitting per Mrs. The Poet’s request.

Someone in front of us in line left $0.72 in the change dish at the grocery store. Since the two people in front of us paid with plastic that means it had been there for at least 4 customers counting us and the person who left it. When I pointed the change out I was asked to please remove it.

Getting the TGS2 balanced in a corner is going to involve tuning the roll stiffness so that the inside front tire lifts clear of the ground just as the limits of grip are reached, and sizing the tires so that they have the same percentage of total grip as that end of the car’s percentage of static weight.

A good chili is a fine balance between heat and flavor. Finding a perfect chili is akin to searching for a virgin among the workers in a brothel, mostly a matter of timing.

Keeping up with Trump administration scandals is causing a rise in adult-onset ADHD making those of us who always had it feel superior.

After doing the research I would not object if someone gave me a’90s era Chrysler LH series car that had a running engine and working 42le transmission for making an SCCA A-Mod Solo Racer.

There should be a reader-only app for Twitter called “Short Attention Span Theater”.

Someone wants to open a “covfefe house” in my town. I don’t know what they’re selling but you know the sign is going to have a short lifespan.

About the time my feet were recovering from whatever I did to them on that walk I dropped a heavy metal object on the toes of my left foot. Nothing is actually broken, but nothing is working right either. It’s almost as if the world will cease to exist if I’m not injured or crippled in some way.

Speaking of free car stuff if anyone over at FCA has a pentastar V6 and a 62te transmission they need to get rid of … I know this guy who’s building this car …

Again, for the people looking for bike wrecks and advice I left the archive alone, but I can’t say for sure the links are still good. If you find my sanity back there could you put it in a box and mail it to me? I would greatly appreciate it.

One of the things Mrs. the Poet likes about taking me shopping is I will find the best buy for any particular product, one of the things she doesn’t like is finding the best buys for things she doesn’t want to buy, but I do.

Do you know what rich really is? Rich is going to the grocery store and having to leave something behind because you won’t have room in the car to take it home instead of not having enough money to pay for it.

I’m looking at the rear suspension for the TGS2 and looking at the composite bellypan/splitter combination and thinking “well since I’m already making the mess…”

We’re having chicken broccoli from a frozen box over brown rice from the rice cooker/vegetable steamer and I put the chicken and broccoli in the steamer basket and the sauce on the top of the cooker to thaw and get warm and pour over the chicken and broccoli after everything’s cooked. That way the only cooking pot/device that needs cleaning is the rice cooker, that was already going to get cleaned b/c we are having brown rice. And I did all the “cooking” so Mrs. the Poet is happy which is always a good thing.

Mrs. the Poet wants some beans and rice before she leaves, so slow cooker and rice cooker next time. I’m really loving that non-stick coating on the rice cooker, it makes cleanup so much easier.

No beer this trip as the specials just didn’t tickle my fancy enough. Also not a big fan of most summertime beers. I prefer a beer I can sink my teeth into. Also what’s the deal of making “beer” with rice? That’s not beer, that’s a bad starter for sake ruined with hops.

And it has been almost a week since my last walk and now I’m really wanting to go for that walk, like really really wanting. But if I go I will aggravate my injured toes. It is a conundrum. And lazy and overfed won out over getting some exercise.

I can’t do my walking thing

Because my feet still feel like they were beaten on, except when they feel like balloons about to pop. Even Mrs. the Poet commented on the way my toes looked, like little tomatoes at the ends where they were red and swollen.

I did some work on the axle since I couldn’t go for my walk and have one boss that will almost allow one kingpin through before getting stuck after a couple of hours of work with the brake hone clearancing the boss… I had to stop because it was too dark and too hot to keep working, and also because my feet were hurting from standing on the concrete garage floor.

So they had a sale on pumpkin pie at the store, regularly $6.99 on sale for $0.99. No that’s not a typo, a full-size frozen pie for $0.99 I like pie .

And now Imma take a shower and go to bed because my feet hurt just sitting here typing. No, I’m not kidding. I have seriously bolluxed my pedal extremities. Especially given my pain tolerance, as Mrs. the Poet tells me I have blisters all over my feet that I can’t even feel. But whatever this is making my feet hurt is almost invisible externally.

Happy Father’s Day, I’m changing the TGS2 design again

I woke up in the middle of the night thinking again, because I had to use the bathroom. While I was sitting I started thinking of how I was going to make the splitters, because they had to be somewhat thin and fairly strong because the aero loads would get rather high at highway speeds and faster, and because people would probably stand on them getting in and out of the car. Then I had a flash from the past back when I was building ultralights (lightweight single-seat airplanes that don’t require a pilot’s license under Civil Aviation Code Part 103) and I sat in on a composite construction clinic. During the clinic we watched a video on making a solid core wing with fiberglass skins using vacuum bagging after wet lay up. I realize that the preceding sentence read like Star Trek technobabble for most of you, so I will explain by describing how I’m going to make the splitters and how that changes the way the rest of the car will go together.

First of all, the core. I’m going to make the splitters and the floor of the car as a single piece, using blue styrofoam insulation board, from the nose to the start of the diffuser at the rear. This is our solid core. Now I could get all high-tech and use carbon fiber to remove every last gram possible, but that would be both expensive and overkill. I will make use of different layers of material for different purposes in the lamination, but the most exotic will be the Kevlar under my butt and the gas tank. Now the layers outside in from the ground up. First will be some light fiberglass mat that will basically be there as a sanding layer and to prevent “print through” from the woven layers. Next will be three layers of fiberglass cloth oriented in different directions to make the splitter stiff no matter how it’s loaded from people standing on it. Then the core of insulation board, then another three layers of ‘glass like on the bottom and the ‘glass mat. Then under the driver and gas tank compartments 9 layers of Kevlar oriented like the ‘glass cloth in the previous layers. The purpose of the Kevlar is to protect my butt and other parts from road debris like what broke the engine on my last car. It goes on top of the mat because the Kevlar is inside the car and it is easier to lay up that way and the mat is damned cheap so I can just run it all the way across without leaving any gaps.

Now the “wet lay up”. This means I mix up batches of very slow curing resin and completely saturate the various layers with the resin before laying them on the core using things like paintbrushes and rollers to make sure every fiber is covered in resin before it goes on the core. The reason slow curing resin is used for this process is applying the many layers is time consuming and exacting, because there can be no gaps or wrinkles in the lay up. Now why wet lay up is simply cost, buying cloth and resin separately is much cheaper than buying pre-preg which is the cloth and resin all-in-one but not yet cured, because it is made below the kick-off temperature of the resin and shipped frozen to prevent the resin from curing until the cloth is molded to the desired shape.

Now “vacuum bagging”. As the name implies there is a bag involved that has the air removed from it after the part is placed inside. Now between the bag and the part are 2 more layers of materials that just keep the bag from sticking to the part. First is what is called the “bleeder layer” that just exists as a path for the air to escape from around the part so atmospheric pressure can squeeze against the part and the layers and get everything really close together. Next is the “peel ply” that goes next to the part and gives the excess resin a place to go and is the real reason for vacuum bagging a wet lay up. The process squeezes excess resin out of the layers which then goes into the peel ply where it is wicked away from the part. Resin is the heaviest part of a composite part, my 47 pound bucket body probably has less than 20 pounds of glass fibers and the rest is resin, in fact from looking at the actual body I would say it is closer to 15 pounds of fibers and the rest resin. So leaving just enough resin to hold the fibers makes a major difference in weight. You can see graphically how much resin is squeezed out by weighing the peel ply and bleeder after unbagging the part. The outside of the bag is polyethylene sheet like what is used as a drop cloth for painting.

And there you have my major objection to vacuum bagging, the amount of waste left after the process. The bag, the bleeder, and the peel ply are all garbage after the part comes out of the bag. The only thing in the process that is reusable is the fitting between the bag and the vacuum pump, and that vacuum pump. In my case I will be using a shop vac so I will be getting sub-optimal results compared to using a real vacuum pump, but I will be getting a flatter, smoother surface by leaving the part to cure on the garage floor. And then throwing away a full garbage can worth of bag and bleeder and peel plies.

Now the real thunder, I can use this process to make an entire monocoque frame and only have the roll cage made from tubing. And in the process reduce the weight of the frame by half over welded tubing.

Can’t. Stop. Thinking.

I was on my walk, again, and thinking, again, about alternative layouts. I remembered a Bucket from “back in the day” that had the engine actually in the body, but Google Image Search can’t seem to find it. It did find this earlier car.Engine in the back, driver in the frontThat did much the same thing but wasn’t a street car.

So what I was thinking was move the body back so the engine was about the place the upper black line is in this picture.Reusing a picture here.
And have the sticky-outy thing on the right sticking out of the body.That's close to what it looks like now.This is cleaned up
And I know the “sticky-outy” thing is the final drive housing.

Doing this won’t change anything except where the driver goes and how he (I) fit.View from the back. Mrs. the Poet is obviously fascinated. Three-quarter rear viewThree-quarter front. Clint is obviously as interested in the car as Mrs. the Poet
You know you have a tiny car when you can mock it up in the living room and not have to move any furniture around. The back of the chair in the pictures is right where the radiator will be on the car. I saw the chance to get a visual reference in place and I took that chance. The gas tank will go about where the box is in the bottom view and the rear view.

Now obviously part of the back of the body will need to get cut away to clear the engine and transmission if I don’t change the wheelbase. Now if I wanted to be really sneaky I could shorten the wheelbase from the 100″ of a stock model T and move the entire engine and transaxle inside the body and just have the axle sticking through the side like on some tubs.Just keep sliding that body back...
And hide everything inside the body. Nothing of the engine would be visible except the exhaust tips. And this configuration has precedent in the original Thunderbolt Grease Slapper.See how far forward the rear tires are?
Move the body back until the back of the rear tire is even with the back of the body with a fake convertible top and just keep the same space in front of the original firewall. Or I could get really sneaky and keep adding that distance in front of the body while moving the engine and transaxle forward until the rear tires are even with the back of the body and keep the original 100″ wheelbase, and put a smooth hatch over the driver’s compartment so that when it’s parked you can’t tell where the engine is.

And looking at the original TGS had me wondering where Tom kept his legs when he was driving, because they obviously aren’t in the car with him. He would have to be an above-the-knee amputee to fit in the car, or drive with his feet sticking through the firewall next to the engine. Ah, well it’s only a cartoon, a fifty year old cartoon at that. They had their own logic and physics .

Also getting back to the car I’m building, if I shorten the wheelbase that moves the balance more neutral to make the handling better. Another reason to move the engine forward.

And I need to get ready for my walk.