The "What Are You Working On?" Thread

Stereo · Dec 1, 2020

It's about 2x (e46 18k faces, this is 41k).... I have a hard time building things at E46 quality

SATLAB · Dec 1, 2020

Just a short gameplay of the "Formula Grand Prix" mod at Monza with M. Schumacher.
As you can hear... The sound bank is sampled from the original GP3 sounds

You will notice also the (almost) fully functional steering wheel.

Jake Grafton · Dec 1, 2020

I'm close to finishing my 1988 Honda Prelude Si2.0.

Does anyone have experience with this car, that could help me test? Especially the suspension.

Thanks!

Stereo · Dec 2, 2020

Good progress on dashboard modeling. The big semicircle is the speedometer, the only gauge that's really readable on my setup.

Raymond Racing · Dec 2, 2020

SATLAB90 said:
The Grand Prix Nostalgia project is going well... All the 3D modelling part is done (I've also included the original driver helmet). Now working on the physics

View attachment 421507
View attachment 421508 View attachment 421509 View attachment 421510

Are these cars going to have different performance based on their RL equivalents? Or are they just the same cars physics-wise for league racing?

SATLAB · Dec 2, 2020

Raymond Racing said:
Are these cars going to have different performance based on their RL equivalents? Or are they just the same cars physics-wise for league racing?

Same performance, they are all based on the same carshape so it’s a sort of a “league formula”.
Btw I prepared a custom grid file for CM with different performances for each driver if you wish to race with an AI closer to the original game

glasshouse · Dec 3, 2020

#227 from the Petrolicious movie "This Alfa Romeo Giulietta is a Timeless Racer"

Showroom_alfa_romeo_giulietta_spider_3-11-2020-17-36-26.jpg

Stereo · Dec 4, 2020

Really leaning on the front tires... I've got most of the suspension input accurately, of course as usual leaf spring rates are just a mystery.

NightEye87 · Dec 4, 2020

If you know the dimensions of the leaf springs, there are ways of doing calculations on those

Ofcourse it's a bit harder with multiple un-even-length springs, but definately possible with FEM software (which I happen to work with on a daily basis).

Stereo · Dec 4, 2020

Hmm, I know the dimensions but of course they're not all the same;
51x2x0.282 inch main leaf (mounted on shackles)
45x2x0.313 inch below that
30x2x0.282 inch below that
15x2x0.313 inch below that
with waxed fabric in between them for consistent damping.

Aftermarket "oem replacement" ones claim 110lb/in so it should be in that ballpark.

Fat-Alfie · Dec 4, 2020

The fact that you have that information to hand is exactly why I have confidence in the mods released by you, and those of the other vehicle modders who research their cars to such lengths

NightEye87 · Dec 4, 2020

Stereo said:
Hmm, I know the dimensions but of course they're not all the same;
51x2x0.282 inch main leaf (mounted on shackles)
45x2x0.313 inch below that
30x2x0.282 inch below that
15x2x0.313 inch below that
with waxed fabric in between them for consistent damping.

Aftermarket "oem replacement" ones claim 110lb/in so it should be in that ballpark.

Hmm, my model might be off. I get to a value of 67,3 N/mm instead of 19,3 (=110 lb/in).

5 kN / 74,3 mm = 67,3 N/mm

So yeah.. ignore it, or don't. I don't know

I'm definately more used to larger structures instead of this fidly stuff.

Edit: I'm using European steel by the way. US steel might have different stiffness factors. But I don't think it's threefold

EttieApple · Dec 4, 2020

Its finally feeling like I am done with 99% of the graphical features. Making a to-do list helped a lot to concentrate on the important features only. Only things to do are optimizations and UI/AI/cameras/reverse layout. If I have some time left I'll try rotating wind turbines, but I do want to release this around Christmas.

Screenshot_ks_porsche_cayman_gt4_clubsport_rally_rallycatalunya_riudecanyes_4-11-120-14-24-36.jpg

Screenshot_gt4_alpine_a110_rallycatalunya_riudecanyes_4-11-120-14-13-47.jpg

Nicecuppatea · Dec 4, 2020

Stereo said:
Hmm, I know the dimensions but of course they're not all the same;
51x2x0.282 inch main leaf (mounted on shackles)
45x2x0.313 inch below that
30x2x0.282 inch below that
15x2x0.313 inch below that
with waxed fabric in between them for consistent damping.

Aftermarket "oem replacement" ones claim 110lb/in so it should be in that ballpark.

I made a little spreadsheet calculator for my old bangers based on this equation: https://www.fxsolver.com/browse/formulas/Semi-Elliptic+Laminated+Leaf+Spring+Stiffness - gives you a reasonable guess-timate if you average the leaf thicknesses and use a typical figure for the Young's modulous of steel.

Gives me 21512 N/mm or about 123 lb-in for those dimensions, going by your figure for aftermarket springs it's a little high but not far off.

EttieApple · Dec 4, 2020

NightEye87 said:
Hmm, my model might be off. I get to a value of 67,3 N/mm instead of 19,3 (=110 lb/in).

5 kN / 74,3 mm = 67,3 N/mm
View attachment 424303

So yeah.. ignore it, or don't. I don't know
I'm definately more used to larger structures instead of this fidly stuff.

Edit: I'm using European steel by the way. US steel might have different stiffness factors. But I don't think it's threefold

Does this model allow for translation in the X axis at one of the mounting points? If the suspension of the Corvette does, this would explain the high outcome (having to stretch the springs as well).

NightEye87 · Dec 5, 2020

EttieApple said:
Does this model allow for translation in the X axis at one of the mounting points? If the suspension of the Corvette does, this would explain the high outcome (having to stretch the springs as well).

Yes. Fixing it creates even more stiffness. There are rotation-free rigid connections (the red lines) which allow for a bit of movement between the blades (because of the height offset), but maybe not enough resulting in higher stiffness. I don't do small scale stuff that often, and this is a whole other niche alltogether, so maybe the spreadsheet above is more accurate

Jake Grafton · Dec 5, 2020

EttieApple said:
Its finally feeling like I am done with 99% of the graphical features. Making a to-do list helped a lot to concentrate on the important features only. Only things to do are optimizations and UI/AI/cameras/reverse layout. If I have some time left I'll try rotating wind turbines, but I do want to release this around Christmas.

View attachment 424355 View attachment 424356

Where is this?

Stereo · Dec 5, 2020

Thanks to @glasshouse for making some vintage racecar skins to include. Also Gary as usual putting the driver in the seat. Pretty close to final now (modeled mirrors are kinda the last thing crossed off the mesh todo, but I'm 99% likely to do some wheels for the racecars, without the hubcaps)

Rodger Davies · Dec 5, 2020

Thanks for making the nods to the racing version, really appreciate that

EttieApple · Dec 6, 2020

Jake Grafton said:
Where is this?

It is the first 4.5 km from this stage from the WRC round in Spain.

⭐ SS 14+16 - Riudecanyes stage in Google Maps - Rally de España 2019 [WRC]

Stage map Riudecanyes - Rally de España 2019 ⭐ Also on this site: Related stages, itinerary/schedule, elevation chart/plot.

www.rally-maps.com

Stereo said:
Thanks to @glasshouse for making some vintage racecar skins to include. Also Gary as usual putting the driver in the seat. Pretty close to final now (modeled mirrors are kinda the last thing crossed off the mesh todo, but I'm 99% likely to do some wheels for the racecars, without the hubcaps)

I love the tire flex in this!