A85 How to open funky butterfly doors. Arete Supercar Project.

Cam following, telescoping, power actuated butterfly door hinges! That is the name of the game in this video, as I build some prototype hinges to solve clearance and sealing problems with the Arete Project doors.

[@SteveBueche1027]

Can’t wait to see those hinges in operation. I also hope you’re monetized. I sit through all the commercials just in case. 👍🏻

[@pivotalevent]

Yes, I am monitized. . . Every tenth of a cent helps ha!

[@alanv3185]

Can't wait to see this thing fully built and driving on the road

[@stephengirling7859]

Keep your head down and i think you're gonna make a great post-apocalyptic project leader!

[@pivotalevent]

Yeah! That apocalypse seems closer than ever in these times!

[@pedropohren]

Now that's a different door layout!!! I'm looking forward to seeing this car in action once it's finished!!!!

[@lvn968]

Thx, love to see the doors on the car, opening in an elegant way.......

[@DavidGuyton]

Fascinating. I love seeing this stuff and can't wait to see more.

[@pivotalevent]

You keep poundig metal and I'll keep building cars!

[@dalecollison791]

Craziest door hinge yet! Looking forward to seeing it in action! Some very creative components there🤯

[@pivotalevent]

Second only to Koenigsegg! Ha!

[@dalecollison791]

@@pivotalevent well I am not sure about that Jay. yes the dihedral door was inventive and unique at the time but it uses a fixed arc. This one doesn't. Thoughts?

[@flpgus]

Today's the day!

[@rasmusljungdahl3238]

Amazing work! Great to see you’re uploading more videos recently! Take care!

[@pivotalevent]

Yep, to make for easy entrance without wide door sills has given me some challenges.

[@scottwhitten5089]

Wow! The engineering for the hinges is fascinating. Keep it up.

[@jarnosaarinen4583]

We'll have to wait'n see how it go's! Good luck with it, certainly is creative!!

[@erikrummel6277]

Really like the idea of using the transfer case chain as flexible but strong hinge/strap.

[@pivotalevent]

Thanks. If it works out I can later recreate it in laser cut aluminum pieces, as it is a bit heavy for its size.

[@felipefelipado]

Hi mate, I confess that it's pretty annoying to wait so long for too little content... BUT it's so fckin good to see the development of this beast. I'm dreamer as well and Congrats, from the deep of my heart. I'll be here for the great launching.

[@pivotalevent]

I hate to be an anoyance. I will press harder for regular video releases. Ha!

[@yellowbelly8402]

You are doing great work creating your Arete By the way you look like the actor Robert Duvall

[@pivotalevent]

Thats a new one. People usually say I look like Bruce Campbell.

[@keithyoung7]

Fascinating as always.

[@benpease4497]

Super neat to see the hinge mechanism coming together! Thinking about doors got me wondering what you'll be doing for locks, if you'll have a remote key fob for the locks, and then what you'll be doing for a computer in the car. So many fun problems to look forward to seeing you tackle!

[@pivotalevent]

Computer is a Mindows tablet (touchscreen info center) as the tunning software is Windows based. No laptop needed. Tune/ analytics from the dash. Door fob- ?

[@tedthalassinos5668]

Thank you ..you are an inspiration ..

[@clydecox2108]

Brilliant work is afoot...

[@54mgtf22]

Love your work 👍

[@UnityFAN]

Cool!

[@tomcarlton854]

thank you.........👍

[@anidiotinaracingcar]

The manufacturer of that hatch hinge is probably Stabilus if you wanna have a look at their catalog

[@BuilderCreator]

Just looked up Stabilius. Thanks. Always good to know new sources.

[@Bruhaha9]

Hi. I'm not so much of a car guy as some. I'm here because I like sculpture, building techniques and aesthetics. You're doing a massive project here that's really impressive. I have a lot of regard for this. I have a question about the initial maquette in clay that was a foot or two long. It seems to have blown up full size quite well, aesthetically. Did you ever think that such a small model might not translate so well visually into the full size body? To detail what I mean - I can imagine that something that you might not have noticed on the small version would have stood out in a negative way once it was blown up. I don't mean obvious, specific features, but a combination of subtle scale relationships might have become glaring once made large.

[@pivotalevent]

True that the translation in scale is a problem, however this methode is only to get a rough full scale version. Most of the serious design and finalisation is done at the full scale. This is why even the big auto manufacturers build a full size clay. If you start out knowing exactly what you want to build (say a reproduction of something existing- "copy") then it is better to have it CNC carved from foam. Thanks for watching!

[@AutomotiveCNC]

That upper hinge will not work properly due to it swinging freely. In order for such a hinge to work, it's mandatory to feature hinge segments with integrated gears so that they will lock to each other and rotate gradually as you bend the hinge. Lenovo YOGA 3 Pro uses such a geared hinge.

[@Scrogan]

I don’t quite get the chain thing, it will be interesting to see how that comes together.

[@pivotalevent]

Yeah! You need to see it from inside the cabin to fully understand.

[@lancemillward1912]

How many thousand hours in this project so far. Impressive

[@jstdrv]

this hole project is amazing to watch Jay, can't imagine where you find the time for all this. Do you have a side business/ trade? cheers from Norway

[@BuilderCreator]

Thanks! We operate a home for mentally disabled adults. Sometimes employees are doing most of the work there and sometimes not. (those times when videos are slow coming. Ha!) Funny, my wife is headed to your beautiful country in a few days- If you see her on the streets say hello. 😉

[@jstdrv]

@@BuilderCreator that's nice! Don't really know what she looks like though :) I have a wheel restoration shop in Oslo called Oslo felgretting. Do contact us if you need pointers on where to go/what to do when in Norway

[@spikaizautoservisa]

Just wondering. Im preparing to make replica Stradale 33. I think i've figure it mostly. The biggest bump is front/rear windshield and side windows. How are you planing to solve that problem with your car.

[@BuilderCreator]

The glass is by far the hardest problem to solve in creating a replica. Often replacement glass for the original car is just not available. If you own an original Alfa 33s you are wealthy enough to have the glass manufactured, just for you, and likely at a cost of more than you will spend on the entire replica build. My solution, was to design around an inexpensive existing replacement glass. (97 Chevrolet Cavalier windshield). The moving glass will be tempered flat glass (inexpensive to have made) and the fixed parts of the side glass will be drape formed out of polycarbonate. Drape forming is probably the direction you are going to have to go as you have chosen the most glass intensive and complicated "greenhouse" glass auto ever built. Ha! Luckily the original Stradale used acrylic for the side glass (with the lapped edge side vents rather than sliding glass) so you can duplicate that fairly easily. Acrylic or polycarbonate is perfectly fine for fixed glass, but for moving glass and windshields subject to wipers and bugs the plastics get scratched up pretty fast. Additionally, most jurisdictions, if they allow home builts on the road, do still require the windshield to be safety glass. The last time, many years ago, that I looked into having a complex windshield made it was going to be over $20K USD. In my opinion, you would have to build multiple cars to justify the price of setting up that tooling. You might look into seeing if you can purchase a windshield from the kitcar manufacturers of the Superlight. not an exact fit and you will have to adjust your design some, but a lot closer to the original Stradale than a Chevrolet Cavalier. At any rate, beautiful car - Good luck!

[@spikaizautoservisa]

@@BuilderCreator thanks a lot for your time taking to write such an extensive comment. I appreciate it very much. Ha! Even if i do have money to purchase original Stadale, there is no way buying it since only 4 of those are made and all are owned by museums. 3/4 if im not mistaking are owned by Alfa Romeo Museum in Milano. Car is so rare that even there only 20 "licensed" replicas are made. I've got in tuch with grandson of the guy that made it, asked me 5k € for blueprints and another 5 for moldings. I was like, no way. Bought 1/8 Burago replica and worked my way in to making blueprints through AutoCad and SolidEdge. Yup you are about right about the costs. With current prices growth, ive calculated around 25k € for production, another 15k-20k € in paperwork to make it street legal. There is a lot of calculations and tests required by the traffic agency. Another 2k for homologation... But, glass is not included in the costs, only thing not figured how to solve. Again thank you for your time for replying to my comment. It is very helpful. Ps fun fact. I came across an information, that one of those 20 replicas is sold in Spain in 2010/2011 for 850k €.

[@jamest5149]

A sugges… The hinge C piece (printed red plastic cam) would be better CNC’ed, cast alloy part will be prone to cracking and is a high stress, safety part. Just send your 3d print file to a machine shop, it shouldn’t take long or cost too much. A door falling off can cause damage to the car and passenger 🤷

[@pivotalevent]

Pehapse in the shake down we can keep a careful watch on the part.

[@angelpikul3131]

What if I have a car I bought and the doors are welded butterfly doors but the passenger won’t open at all

[@BuilderCreator]

Maybe you should have tried the passenger door before purchasing?🦋

[@HowDareYouu]

too bad this car has zero crash protection

[@richardross8849]

please stop using end mills in a drill chuck.

[@pivotalevent]

But I love end mills. . . And my name is not chuck.

[@spdy3926]

@@pivotalevent haha

[@radfloors]

How… just how.