Heat indexes have been off the charts lately, from what I can tell. I haven’t been able to go for my walks so I have been spending most of the time indoors and hardly check the weather, but it’s 86°F in my office as I type this with the AC going. So it can’t be anything but hot outside. But just FYI my phone says it is currently 98°F outside. At 1855. So by deduction it must have been over 100 at some point today, say like between 1400 and 1500. ETA the 2200 news weather report had a 100° high temperature. And the urban heat island effect keeps the nighttime temperatures up, too. And this is where today’s headline came from YouTube
I’m not happy with the way the floor came out for two reasons. Number one is I forgot to include the front support for the front fenders, and 2) I made the rear cutouts too wide, as shown in the pictures. Seriously I left enough room for a 16″ wide tire and the widest race tire I have been looking at seriously was 14″ with the street tires in the 12″ range. And I have plenty of raw stock for the floor, finally. So the floor will get a do-over. And that’s why those 9″ wide tires in the pictures looked so lost in there. Even the 10″ wide tires for the Mini Sprint-T would have been swallowed up.
While I am on the subject of the TGS2 I have been looking at a pull-rod spring instead of direct mounted springs for 2 reasons. One reason is I can change the spring rate just by changing 2 bolts, either a little or a lot, The second reason is the unsprung part of the pull-rod is much less than the direct mount spring because the entire spring and shock are moving with the car. Yes they move with the axle but they are entirely supported by the frame so they are sprung weight. The bellcrank and mount add a couple of pounds but it is all sprung weight. But the primary reason to go with the pull-rod springing is adjustability, I can change spring rate and ride height in just a few seconds and swapping a different length pull-rod is much cheaper than swapping different shocks and springs. Literally a dollars to donuts comparison, I can buy or make a custom pull-rod for about the price of a dozen donuts where a spring and shock absorber are $200-300 assembled. With my budget this is a cost-benefit ratio I can most definitely live with.
And I need to take a shower and hit the hay.
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.
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.
And the cut version.
And with the bucket from the Mini Sprint-T resting on the floor.
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 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.
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.
Showing the position of the outer edge of the tire.
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.
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.
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 just read an author’s use of the Bechdel Test as a bare minimum qualifier for equity in a story. This got me thinking of a story that had no on-camera men, all the speaking characters would be women. And the only thing they would talk about would be men, and other women. Set it in a nursing home and call it “Gossip Grannies”. None of the speaking characters would talk about themselves or any of the other speaking characters, and each weekly arc would be about a particular combination, guy-girl, guy-girl-girl, guy-guy, girl-girl, whatever. For all my comic artist/writer friends here’s a free setup, just put Based on a Concept by Opus The Poet in the credits.
Are the guillotines ready?
I’m dealing with two problems today. One is my sleep schedule is all bolluxed. The other related is it only cools off in here around Midnight. And by “cool off” I mean near 80°F. As I type this it’s 0130 and 84° in my office. I have a fan blowing on me so it’s not too bad as long as I remember to hydrate and drink cool liquids, no coffee. Another thing I can do is take my sleep medicine so that I can get to sleep by 0300 and be up by 1100.
I knew the junk mail would eventually send me another card I could use for the TGS2. It came (what is now) yesterday. I should be able to take a picture of the finished floor by Saturday since I already know how to do the front cutouts, and have a very good idea of how I want to do the rear cutouts. I still don’t know how I want to do the rear fenders, but I do know that if I get them right I will get less drag and more downforce especially compared to running no fenders. I guess I can make temp fenders out of HDPE and do A-B-A testing until I settle on a final design and make that one out of more durable materials.
The bushings are still not installed in the spindles. I spent hours beating on them to try to get them in the spindles, but there is one that doesn’t want to go into the spindle, and all but one will need to be drilled for grease holes where the zerks go in the spindles because the factory grease hole didn’t line up because I installed the bushing wrong or because I’m discovering why these spindles were in the Garage Sale section of the web site. Take your pick. I can tell you that 2 bushings would never line up because they were too short or the hole in the spindle too long, but they would line up if they were installed from the side where there is no room to install them. And that says to me that there was a machining step left out somewhere. Ah well, it is what it is and I have to find a way around that.
OK I have been sitting here sweating like pigs don’t (that’s why they roll in the mud) and I need to take my sleeping pills and go to bed.
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.
Usually I sleep pretty soundly, but something was making noises like someone trying to break into the house shortly after sunrise this morning and I couldn’t get back to sleep. I spent most of the day running around taking care of banking, buying cat food, and paying the phone bill. With temperatures in the mid-90s and “feels like” temps in the low 100s I was dehydrated again, and between dehydration and exhaustion I have been bouncing my face off the keyboard. I’m going to take a nap and come back to finish the post.
OK it’s 4 hours later and I’m feeling better, not great but better.
As you might imagine I got no work done on any projects what with all the time spent running around. That’s OK I can’t do everything. I did find some information about lightweight OE replacement spindles that I could use for an IFS. There’s the MII/Pinto spindle that comes in at 17.8 pounds per pair or 8.9 each, and there is a forged aluminum ’60s GM F-body spindle that weighs “half of stock”. And there is also the late ’60s VW balljoint spindle that is also slightly lighter than the MII/Pinto spindle, but is tricky to find outside of eBay and even trickier to find big brake kits for. The biggest brakes I have found for this spindle top out at 11″ diameter. Another lightweight candidate is the Wilwood MII modular replacement spindle at 9 pounds each but massively strong and the steering arms can be replaced for more lock/quicker steering/bump steer correction.
And now I’m hot and sleepy again, so let’s end this and park my butt in front of some AC and get more sleep.
Not much going down today. The cats have been wandering around the house looking for Mrs. the Poet and now her cat (Clyde) is behind me in my chair and trying to worm me off the chair. I’m a little peeved at the cats at the moment because one of them knocked down the card I was using to make the floor for the TGS2 mockup and put a big crease in it making it unusable. I suspect Clyde because I saw him walking through my work area several times but since I didn’t see the crime happen I can’t collar a suspect. Now I have to wait for more of the right kind of junk mail to come in.
Speaking of the scale mockup TGS2, before the cat walked on it I finally had a layout I was comfortable with for the wheel cutouts. But since I know what I did I can do it again even better when the next suitable piece of junk mail arrives. Now watch as I never get that kind of junk mail ever again.
My eyes are still bothering me after the allergy attack that kept me from playing with the RPG yesterday. I’m still getting intermittent whiteouts from the goop in my eyes, but at least the itching and burning has gone away. I’m trying to figure out what has been causing all this hate and discontent but all I can get is “grass pollen” when I was hoping for a species to exterminate. I really hope it’s not all grasses because I like walking barefoot on a lush lawn, and wiping out my lawn won’t protect me from the neighbors’ lawns or the lawn down the street or the park the block over. Not to mention all the positive benefits of grass in reducing the heat island effect of metropolitan areas.
Off on a tangent does anyone know what the effect of replacing conventional roofs with solar shingles would have on the heat island, worse, better, or about the same? How about covering asphalt parking lots with solar panel canopies? I’m hoping for a win-win-win of reduced heat island to go with the weather protection underneath and power generation.
Back on track, part of the problems I’m having is the allergies are making me dehydrated somehow. I don’t know if having my nose blocked makes me breathe through my mouth more or what but I tripled my fluid intake today and I’m still getting the dry-eye. That would be something else interesting to study.
Well I have meandered long enough, I really need to do some things around the house.