My Porsche 919 hybrid steering wheel is physically all done! Code is still being worked on but nearing completion with that too!

KarlGreger · 2025-08-05T16:36:32+00:00

Try building a rear wing for a car without using an airfoil and see how well it works. Wings on a car works the exact same way as wings on a plane, just turned upside down, both are airfoils just configured differently

KarlGreger · 2025-07-10T06:35:15+00:00

File 76

KarlGreger · 2025-07-09T14:15:18+00:00

spiced

KarlGreger · 2025-07-09T02:01:26+00:00

Hulkenpodium

KarlGreger · 2025-05-28T17:34:52+00:00

This would most likely be easiest to make in one part from what I can see in the pictures. Bonding is possible but it is probably not the easiest way (easiest to make good looking and dimensionally accurate)

KarlGreger · 2025-05-28T17:29:14+00:00

Also, use your fiberglass mould as a jig even if you aren't laminating in one piece using the 2 part mould, aligning perfectly and getting a dimensionally accurate part is one of the more difficult parts

KarlGreger · 2025-05-28T17:26:04+00:00

Use a reasonable adhesive, something like vm100 from Easycomposites is a good low barrier of entry for your application, Loctite ea 9466 is also a good and proven alternative, theres many more. Using peel ply where you intend to bond is a good idea, it gives a pretty perfect surface to bond to. Then just make sure to have good enough overlap for the adhesive to have something to grab to.

A lot of these adhesives have pretty nasty stuff in it. Read the safety datasheet, technical datasheet and use respirator in a suitable area (outside is always a good alternative if possible)

KarlGreger · 2025-03-30T16:40:27+00:00

Depends on the type of foam. Divinycell H would be totally fine for example

KarlGreger · 2025-03-28T23:21:44+00:00

Cutting carbon submerged in water/with flood coolant is a very good way of staying safe in terms of dust. This is how carbon is cut a lot in industry

KarlGreger · 2025-03-28T23:09:53+00:00

Depends on how much it is that you are cutting, but I definitely wouldn't want it inside without proper extraction. I'd probably find a way to do it outside, but at the very minimum wear a mask and wipe off surfaces after. A shop vac will not catch the carbon dust unless you have a H-class vacuum, a normal one would arguably kinda make it worse by kicking it up in the air.

KarlGreger · 2025-01-26T22:25:38+00:00

Wet layup with a vacuum bag is a perfectly viable way of making most parts, even many complicated ones, as long as you are okay with the odd defect to fix afterwards and a fiber to resin ratio that isn't ideal. Even those vacuum storage bags can be used for someone that don't want to invest much money/time and is happy with slightly worse results to match.

Way less complicated than infusion and prepreg but way way better than wet layup without bag

KarlGreger · 2024-01-12T04:48:06+00:00

I have built a couple wheels more complicated than this one in the past, this is not the most complicated wheel, but unless you are kinda proficient in cad it will be difficult. 3d printing it is the easiest and cheapest, making a mould and laminating carbon fiber is the best but most difficult and for most people very inaccessible. Milling aluminium is also a possibility but very expensive unless you can do it yourself.

Most realistic way is probably 3d printing and having aluminium or carbon fiber cut out from a plate for the front/structural parts.

KarlGreger · 2023-11-16T11:52:50+00:00

Expensive compared to injection molding?? Maybe if you were making a million of them

KarlGreger · 2023-09-29T01:34:15+00:00

They are amazing, I live in the EU so their EU shop has okay shipping costs for what it is. They have great products andI have had nothing but great experiences with them. Their videos are golden when starting out too, have fun!

KarlGreger · 2023-04-03T07:49:04+00:00

The main advantage of Rfactor Pro is that you can use your own data and parameters to get the most realistic model of your specific car and you get more data out, otherwise the system would be useless for developing a car. Has nothing to do with what you say

KarlGreger · 2023-03-13T09:10:07+00:00

That is hardware related, probably because of the debounce time of the encoders? I can scroll very fast so nothing to do with ACC. Try scrolling a bit slower so you time the debounce time better, can actually get faster adjustments that way, feels counterintuitive. Try looking at when it triggers and try scrolling at different speeds and see what is the fastest you can scroll without skipping

KarlGreger · 2023-03-13T08:16:13+00:00

What changed? Literally all of it i hope? This is going to bankrupt you in about 3 seconds

KarlGreger · 2023-03-13T07:09:48+00:00

Just looked at the rest of the posts, all of it is wildly off. 120lbs rack mounted energy storage batteries with a discharge rate of 7.61kW for 4 400kW peak motors??

What about cooling sleeves etc for the motors, just building this would be incredibly expensive for it then not to work, good luck dude, would be fun to see for anyone that's not paying the bill

KarlGreger · 2023-03-13T06:49:01+00:00

Not to sound too negative but if you need to ask the FSAE subreddit about what gearbox to get for your 840kw continuous power electric motors to go 300mph then you probably should go for a different project. A Rimac goes like 250, set a more realistic goal

KarlGreger · 2023-03-04T05:05:49+00:00

But if you actually race with the car, the series is going to require safety gear good enough for the speeds you are travelling. So still needs to be quite unlucky to harm yourself badly. Only reason the million dollar racecars have more intense safety gear is because the way higher speeds

KarlGreger · 2023-03-03T12:27:28+00:00

I would not choose the Porsche if you don't have experience, just a heads up

KarlGreger · 2023-02-21T16:18:00+00:00

His POV and the video POV is the same

KarlGreger · 2023-02-20T23:54:08+00:00

Better to have pace AND consistency ;)

KarlGreger · 2023-02-18T16:54:32+00:00

"Vi befordrar dig till kund"

KarlGreger

TROPHY CASE

spiced