Photochop butchery ( aeromodding cars using Photoshop )
 

I've done some image editing on cars that I can't modify in real life. ( No garage ...and no money ! )
These are just doodles I have done on my phone ( So not actual Photoshop, of coarse )

The one I did today, was a 1st gen. Nissan Leaf.
What if you took a SawZall to the A pillar and leaned the roof back ?
I'd make it a 2 door, with enough room in the back for my dog. I have never had a need for back seat passengers anyway.
Side window glass would have to be reworked. The back doors could have plexi as a window material.
The doors would still open from the inside, but not with the intention of having passengers back there other than my dog.

The roof would have a section cut out for a plexiglass window - or maybe an actual rear window fused in from a junkyard car ( whatever fits )
It would be hinged and be a hatchback.
The headlights and grlle would be reworked to be flush and maybe have some scoops for some air curtains.

The boattail would collapse into itself for city driving.

https://ecomodder.com/forum/attachme...1&d=1676770027
https://ecomodder.com/forum/attachme...1&d=1676771052
https://ecomodder.com/forum/attachme...1&d=1676770120
https://ecomodder.com/forum/attachme...1&d=1676771920
Here is my inspiration : https://ecomodder.com/forum/attachme...1&d=1676772840
https://ecomodder.com/forum/attachme...1&d=1676817961
https://ecomodder.com/forum/attachme...1&d=1676817961

Amazing that you could do that on a phone.

I was thinking of your inspiration before I got to the bottom of the post.

I've thought of a slant chop on another car. I'd cut across the cowl, right back to the back of the A-pillar. Then add metal into thte gap that opens up

It's good to see you're still including the boat tail. You like blue?

ME Andy - yes it's a bit nuts to do this on a phone. Even worse is trying to upload it to Ecomodder. My phone jumbles all the images and i dont get a full preview ( the view is cropped ) and i have to guess which pne Im uploading.
What is crazier still, is that I tried doing a 3d model hack on my tablet, but it is so old that I can't zoom in without it falling apart .
So I am going to attempt to edit the model on this phone too : )
Freebeard : That's pretty much what I'd do too. The entire wiper assembly would fall back to the angle of the windshield.
As far as blue, no I don't care for that color. I just included that image because it is such a common color for Leaves.
I would take mine down to bare metal and give it a cyberpunk look.
Plastic bumpers could have sheet steel riveted to them.

that is tempered curved glass on the side windows, so it can't be cut after the top is chopped.

What you could do is play with the regulator and window and not roll up the window all the way to simulate the chop, then tilt the side window glass back in the regulator to match the new roof taper. if you find something that works with the side windows and still rolls up and down, then chop the door frame to match the window rolled up. Then chop the roof to match the chopped doors.

If you chop the roof per your mockup first, you would be stuck using lexan side windows and would be lucky to get one to roll up and down.

You can lay the windshield posts and windshield back but would only be worth a few tenths of sq. foot of frontal area reduction, but would be a ton of work. In a typical roof chop, the roof needs to get wider at the top or the side window slope has to change. They usually put in a filler piece strip in the center of the roof to make it wider.

Else pop-outs. :thumbup:

'Prius'
 

*I'd want to analyze the roofline for deceleration overshoot. NISSAN has used a CALTY roof like that on their Z-Cars for decades, but they never demonstrated any remarkable low drag attributes. It might be okay, but it would be prudent to validate.
* On the rear diffuser, I'd take the SAE 10-degree 'departure' angle, projected up from the back of the rear tire/ground interface, and lower the rear transom lower trailing edge to that imaginary line. It's my opinion that, the up-slope as presented, would never support low drag.

What app are you using? I’ve been wanting to doodle some Ioniq boat tails before fabricating a real one with dibond and a detachable hitch mount

What tablet? What phone?

I've been painting everything (stool tops, shelves) Slate Blue. Me like. Instead of riveted sheet steel, maybe a metallic Plastidip?

Aerohead, I know what you mean about the sudden roof slope.
I was surprised at the detached flow on the roofline of the 240-Z - especially when I have seen airflow remain attached on sharp corners that I never would have thought would work.

The slope on the 350 - 370Z seems to work though. The cD is .29, despite the massive wheel openings and flares.

Agreed about the floor slope angle. I got sloppy with that.

Regarding the app I use, it is called ArtFlow.
The 3D app is called Prisma3D.

I'm using both on a Note8.

Caddylackn : Great advice.
This is just a "what if" doodle. I have no real plan to create this.
However, if I did, I would do something similar to what you mentioned.
The windows would raise as far as they could go, and any gaps could be filled in with something custom.
I have a 3d model of the car that is accurate.
It would give me an idea of how far off the windows would be with the roof laid back.

NISSAN Z-Car roofline
 

I finally located a photograph for wind tunnel smoke-flow imaging of the 2020 NISSAN 370-Z ( I'd originally found it online ).
Three smoke filaments are presented.
The second-lowest makes contact with the boundary-layer on the windshield, over the top of the roof, an then separates immediately beyond the roof apex.
The 370 is 1,315mm high, and based upon the 'daylight' between the trailing edge of the upper body, and the local streamline, there's a 82mm separation gap.
A first-approximation solution for reattachment would be a shallow, upswept rear spoiler, with its tearing edge just touching the bottom of that streamline.
Dr. Hermann Burst might have recommended lofting the entire rear contour up to this imaginary line connecting the span.

Looking at the glorious Panhard LM64 car that ran at LeMans in 1964.
Tested in a windtunnel, a large model of the car showed an astounding .12 cD !
Despite having only 78 HP in race trim, the car attained a speed of 137 MPH, all while getting an incredible 37.58 MPG !
This is a Photochop of the car compared to a Mazda Miata.
The cars were even the same color.
https://ecomodder.com/forum/attachme...1&d=1683423768
https://ecomodder.com/forum/attachme...1&d=1683423768
https://ecomodder.com/forum/attachme...1&d=1683423768
https://ecomodder.com/forum/attachme...1&d=1683423768
https://ecomodder.com/forum/attachme...1&d=1683424186

Just imagine - even if the aero figures on the LM64 were off by a massive 50%, that car would still have a cD of .18 !

Bob the tail and cut out the fender flares. Tall, narrow tires. :thumbup: