Plastic Fantastic 2

[SuperBuickGuy]

Door locks. I've actually come out to people sitting in my car. They still live, but let's slow the idiots down

weld a tab to the lock bar

all fits under the panel

of course this door can't go together because I'm waiting on a regulator.

 

[SuperBuickGuy]

driver's side done more detail
pull wires

actuator install

it was simply easier to weld a tab to the rod to connect it all up

and just like that, connected

and reassembly of the dash

once the right side regulator gets here, I'll assemble the right side.... between now and then, I have plenty to do... some of the aero should be here tomorrow....

 

[bobs77vet]

you have to wonder why some one would think it was ok sit in your car,

once at rest stop on 95 we were sitting in our silver minivan with the doors open when some ones else grandma climbs in the car......we look at her , she is totally surprised we are in her car and at the same time hear "Mom. Mom thats not our car." she said "oops" and left we were laughing our asses off.

 

[SuperBuickGuy]

even with the top off, I hope that the doors being locked at least gives them a moment of pause to consider the consequences of their actions.... it's a bit of a paradox, though, I enjoy car shows but I don't really enjoy showing cars.

 

[SuperBuickGuy]

oh you clever racers.... this is why you never screw with that old guy at the track.... look closely at the targa top..... 'free' downforce and makes a liability into an asset..... clever, very clever.

 

[phantomjock]

SBG - WOW! THANKS!

The lower right image - as you show, is the exact embodiment of what I was trying to share on the other thread. Thanks for saving me trying to draw it out!
[Link to thread: https://www.vettemod.com/threads/internal-body-aerodynamics.11568/post-135948]

An airfoil attached to the flying buttress would be an easy means to smoothing the flow over the rear deck of a coupe. Plus the "subtle" shaping of the top aids the slot effect, and flow direction. Any downforce generated from this "roof" combination would be in a very welcome location too (over the rear wheels and not too far aft). I imagine running with the rear widow out is advantageous as the side windows must be open for many tracks. Would be fun to see flow/tuft video of that rear deck roof combination!

It is a bit difficult to see the air dam - but appears to be mounted to a "Pace Car" spoiler. Also the additional (if understated) canards suggest something happening in the rear too. Any note of a diffuser there?

Did you have a chance to speak to the owner/designer/builder?

As a side (or top) note, I'm seeing more tow hooks mounted as in the upper picture too.

Thanks for warming up my cold Florida day (29 degrees). Nothing like you guys up north, but unwelcome here.

Cheers - Jim

 

[SuperBuickGuy]

he's been trying to sell that car - 75k with all his spares - he's on one of the FB C3 pages (and maybe SCCA?) when I remember his name, I'll post up his contact info -

it was a balmy 36 degrees today here.... supposed to be 45 day 36 night for the next week... we call this our yearly spring-fake. It looks like spring is going to spring but winter will come back - usually in March (which I'm counting on because I plan on taking advantage of a race instruction day February 20th... usually it's fine, but sometimes most decidedly not. That said, I think I've got the appropriate cars for conditions and who knows, I might do a track day in my FJ40 (Pacific raceway - where I'm going - the track drops into a canyon to a hairpin then climbs back out.... it's a challenge moist, let alone wet or snowy

found the website
https://awesomejoeauctions.com/classifieds/4680578-1968-Chevrolet-Corvette-B-P-Race-Car
and believe it or not, there's another one out there that I haven't found... will post when I do

 

[SuperBuickGuy]

there we go - a way to message the owner

https://dev.racingjunk.com/vintage/184008259/1968-Corvette.html?category_id=4438&np_offset=-3
Interesting, it's listed in Tampa but an Illinois number

https://www.tamparacing.com/forums/...000-contact-mike-phone-630-567-0298-emai.html
the air intake...
https://bringatrailer.com/listing/1968-chevrolet-corvette-28/
but in those photos, that front spoiler system is very interesting...

 

[SuperBuickGuy]

and... I think that's just an air intake for the rear brakes.... it looked like it went all across but the other pictures show it with tubes going down to the rear

 

[Twin_Turbo]

so here is the rear suspension I'm planning on using
http://www.corvettefaq.com/c3/6link/

and pictures of the bits....
View attachment 45867

and no, the stack isn't right - but it's the basic idea.

That looks like pier paolos irs

 

[SuperBuickGuy]

That looks like pier paolos irs

and never used it, built it for the C3 that's my avatar but then sold it and bought PF2. still have the bits, however, I cut them out of too-thick steel so they've become random scrap to use for other projects.

been a day since you've been around, welcome back.

 

[phantomjock]

SBG -

Thanks for the links - looks like you're right on the brake cooling NACA duct in the roof - not a wing section.
Nice optical illusion and willingness to "believe."
Now, I've got some sketching to do...

Cheers - Jim

 

[SuperBuickGuy]

SBG -

Thanks for the links - looks like you're right on the brake cooling NACA duct in the roof - not a wing section.
Nice optical illusion and willingness to "believe."
Now, I've got some sketching to do...

Cheers - Jim

I think the optical illusion is the start of something great. I've been considering all I've been talking about with an angled radiator and then - after seeing the ductwork on that car, thought, well why don't I put vanes on the back side of the radiator to straighten the airflow? I could, literally, hide increased downforce there by ducting back up to the hood vent (or simply aim the air back up towards the vent). Sure, it would slow down flow but the benefit of reducing the lift induced by the angled radiator might make it all worth it.

There's be a lot more noise about how the Ultimate Street Car challenges are far more race car then actual, street car. My guess is in the near future they'll start limiting aero on even the older cars - thus the hidden stuff may keep me both competitive and unlikely to need an entire new car when the rules hit.

 

[phantomjock]

I think the optical illusion is the start of something great. I've been considering all I've been talking about with an angled radiator and then - after seeing the ductwork on that car, thought, well why don't I put vanes on the back side of the radiator to straighten the airflow? I could, literally, hide increased downforce there by ducting back up to the hood vent (or simply aim the air back up towards the vent). Sure, it would slow down flow but the benefit of reducing the lift induced by the angled radiator might make it all worth it.

Add a bit of Chaparral action to the idea... put 2 3000 cfm fans on the backside of your radiator to help straighten the flow. Then you have a "plausible" reason for the vanes/ductwork too. if the radiator is in a bottom sucker position -- all the better I'd think. Can't say how much to gain - but it is in the right direction.

Cheers - Jim

 

[SuperBuickGuy]

Add a bit of Chaparral action to the idea... put 2 3000 cfm fans on the backside of your radiator to help straighten the flow. Then you have a "plausible" reason for the vanes/ductwork too. if the radiator is in a bottom sucker position -- all the better I'd think. Can't say how much to gain - but it is in the right direction.

Cheers - Jim

darn you.... lol... I spent part of this afternoon chuckling about the notion, then seriously considering it....

 

[SuperBuickGuy]

I have little confidence that this will survive in any recognizable form but I want the inlets and most of the shape - but it's too narrow for my plans so fiberglass fab is coming soon

first part of my wing arrived

and the regulator

 

[phantomjock]

Ok - Ok - I'll make a drawing. I was disappointed that the C3 that looked like a rear deck solution - wasn't. So today, while going through some files, found this cool rear end treatment, that I need to share.

I looked on Tineye and couldn't find it, so you've got to put up with my scan of a ratty piece of paper. NOTE - the buttress on this rear wing seems to have been lengthened all the way aft to the wing.

Finding that motivated me to fire up the CAD, and make a quick rendition of a Winged-Buttress design for C-3 coupes. Not engineering quality, but if I had some CFD skills, I would run some stream lines. But sometimes intutition is as good as measurement. Who knows?



Thoughts?

Cheers - Jim

 

[SuperBuickGuy]

On SUVs, those work fantastic at keeping the rear window dry.... but wouldn't that create lift

an interesting article on buttresses
https://driventowrite.com/2015/01/13/aerodynamics-design-features-buttress-history/
my thought is this - rather then add - take advantage of the shape and make the underside flat. Because the air is going faster under then over, it would create high pressure on airspace above the rear deck - thus smoothing airflow (rather then allowing it to tumble the moment it hits the low-pressure immediately behind the targa)

 

[phantomjock]

All good thoughts - I wanted to articulate the concept of a "roof" airfoil that the earlier picture looked like.
I "cheated" and just copied the arch of the buttress and roof line with no attention to the shape of the airfoil. Much work could be done here. (it was just a 10 minute effort by a low skilled CAD-artist)
And yes - it would need some shaping - or some clever use of a gurney, or vortex generators. Filling that area (on the rear deck) with airflow could "shape" the external flow and reduce drag - with less weight than a "fastback." Anything to reduce the drag from that area should be a good maneuver.

BTW the rear airfoil on the red "vette looks a lot like the F40 Fiero mods, don't ya' think?

Cheers - Jim

 

[SuperBuickGuy]

All good thoughts - I wanted to articulate the concept of a "roof" airfoil that the earlier picture looked like.
I "cheated" and just copied the arch of the buttress and roof line with no attention to the shape of the airfoil. Much work could be done here. (it was just a 10 minute effort by a low skilled CAD-artist)
And yes - it would need some shaping - or some clever use of a gurney, or vortex generators. Filling that area (on the rear deck) with airflow could "shape" the external flow and reduce drag - with less weight than a "fastback." Anything to reduce the drag from that area should be a good maneuver.

BTW the rear airfoil on the red "vette looks a lot like the F40 Fiero mods, don't ya' think?

Cheers - Jim

it would be a bit or a paradox if we found that the hardtop cars could have better aero then the convertibles

it does look fiero-ish, but is that a good thing? my first thought, though was 1st gen NSX

 

[SuperBuickGuy]

No, you do not have to remove the glass or the outside weather strip....

the parts

getting close the bloodletting being done - but notice that the bottom hole isn't aligned - Chinesium strikes again. Nice touch that all the bolts are 10mm socket head

 

[BBShark]

No, you do not have to remove the glass or the outside weather strip....
View attachment 53267
the parts
View attachment 53268
getting close the bloodletting being done - but notice that the bottom hole isn't aligned - Chinesium strikes again. Nice touch that all the bolts are 10mm socket head
View attachment 53269

Interesting, this job is in my future. You don't need to remove the window but is there hardware (like rollers) that need to be replaced on the glass?

 

[SuperBuickGuy]

Interesting, this job is in my future. You don't need to remove the window but is there hardware (like rollers) that need to be replaced on the glass?

usually the problem is worn pivot points, not worn rollers (or worn teeth on the regulator - my problem). That said, you can buy an entire, wheel kit from most of the major suppliers.

 

[SuperBuickGuy]

door assembly

of course, had to modify... smh

back together... woohoo

 

[SuperBuickGuy]

and the driver's side window doesn't go up... oh good grief

in other news

dies arrived

 

[SuperBuickGuy]

interesting aero ideas on this...

 

[SuperBuickGuy]

and part 2....... still one more part

 

[phantomjock]

interesting aero ideas on this...

Nice video!

Thunder Racing... they are a German Group. This is a scratch-built 1/48th model of their previous car.
Somewhere I have a pic of them in the pits, but they are following the path they started.

Some definite similarities.

Cheers - Jim

 

[phantomjock]

Another pic of the blue (Previous) edition. Note the scoops on the flying buttresses. Not on the Gold. Wonder if they dropped them as they were not efficient - or some classification rules?
Maybe I'll reach out to them via YT. Meanwhile, the Blue at Hockenheim:


They've made some slick improvements in the airdam/splitter on the Gold, and have added some louvers on front fenders not seen in the blue pics. Refined radiator too.


Cheers - Jim

 

[SuperBuickGuy]

At some point, I'll probably have to get a hood like theirs - we'll see after next Sunday, first Autox of the season, probably shouldn't do it but I need seat time and we don't have much in the way of weather windows until June.