A40 - How not to die in a supercar. Arete Supercar - laminating the vertical beam, roll structure

[@samueleskilsson6152]

3:25 that big ass spider in left hand corner

[@AlexA-bx8jr]

omg saw that too

[@ross82]

Nah, it was just an insect on my screen, not sure how you saw it though 🤔

[@HelmutKohlrabi]

It's a cellar spider, they grow huge. Disgusting little buggers.

[@DickHertz247]

Apart from CAD, Photoshop and carbon fiber, which hadn’t been invented yet, I have been witnessing right here pretty much every step of the design and construction process of racing car prototypes at Porsche in Weissach in the 1960s to bring the 917 to life. Thank you, Sir! In your car I found that you must like the GT40, the Dino and the 917.

[@BuilderCreator]

HaHa! Yeah, pretty amazing what they could build back in the days of T-squares and slide rules. Still applicable today when you can't afford CATIA and Autoclaves. Indeed, I love the aforementioned cars, but you might take a look again at Ferrari's 1964 250LM for a more direct connection to lineage of my inspiration. Arete is a bit of a tribute car to Sergios Pinninfarina and Scaglietti and what they might have built if they brought back the LM today.

[@mortgageloansandheavydumbbells]

Spider at 3:30!!! Now you have to burn down the whole shop!

[@Cubanb407]

Needs a shop cat lol

[@BuilderCreator]

One of many spiders . . that would be a lot of burning! By the way, that spider decided to stop and wait for me to finish the video- he didn't make it to a dark corner to live a long life.

[@BuilderCreator]

@@Cubanb407 allergic to cats! I do have one of those salt shooting bug guns - no good for flies, but GREAT for spiders- and entertainingly fun.

[@Cubanb407]

@@BuilderCreator shop iguana 🦎 lol

[@BuilderCreator]

@@Cubanb407 Now were talkin!

[@iforce2d]

I find it more convenient to pour the hardener (smaller quantity) first, because it's easier to multiply by 4 in my head than it is to multiply by 1.3333, and also because it's easier to be accurate (percentage-wise) when pouring the larger quantity.

[@AudioFlat]

Normally the structure around the windshield is reinforced and I’m very surprised you haven’t used a U shaped steel element running around the windshield and down to the main chassis. Also, I see you intend to directly bind the windshield to the frame and if there is any body flex there is a very high chance the windshield will crack. A really great project though :).

[@BuilderCreator]

More reinforcement to go. Urethane bonding directly to the frame makes the windshield part of the structure. Some cars even use the windshield as part of their roll over protection. True that flex can be a problem. . . we will just have to eliminate it.

[@GrantOakes]

You asked about gel coats. We used a lightweight sprayable polyester filler called feather fill as a primer. You catalyzed it like a polyester resin and in about an hour and a half it was ready to sand and it would fill in any small imperfections.

[@BuilderCreator]

KZbin shows you as a new subscriber. Thanks for following the channel. I've tried Feather fill as well as directly spraying automotive primer into the mold before lamination. I've found that I'm just not that good of a composites fabricator as I seem to always find some area that needs a little sanding attention; then its back to bringing out the primer again. Perhaps in a production set up you could get into a routine and the errors corrected. As I rarely build a run of any item, I have learned just to sand and prime before painting.

[@tomtheplummer7322]

This answers some of my questions about a roll cage or not.

[@JarvieDigital]

Super important thing to consider. :)

[@ianskinner1619]

corecell is your friend for reinforcing your glass structures.. I've used it in many high load and impact areas. Vinylester is UV resistant, and is much closer to properties of Epoxy.. the best of boat worlds.

[@richardsmith9509]

Boat worlds or BOTH worlds....The build on this car is awful. Jay is the nicest guy but his car is scary dangerous....

[@mortgageloansandheavydumbbells]

The piece that I'm really interested to see is how to make custom motor mounts and how to mate them with the monocoque structure.

[@BuilderCreator]

You can watch this video to see the fabrication of motor mounts kzbin.info/www/bejne/d4TYgomdf551epo but they are attached to the steel sub-frame. There will be in the future, mounts for the transfer case that will affix to the monocoque; perhaps that will fulfill your viewing interest?

[@lettersandnumbersuc]

@@BuilderCreator You just like to say “Monocoque” don’t you?

[@WireWeHere]

2 part epoxy and resin manual push stroke volume ratio dispensers are great every time they're good.

[@gregoryperkins2180]

for me i would use 12 point cage integral to front section with control arm attachments. then bolt the back assembly to the cockpit cage through the bulkhead bottom middle and top. head ache bar protecting cockpit from engine movement in foward crash. cross bar for 5 point harnesses. for racing they allow .090 wall 1.5" tube. i use .120 wall for safety. some sort of door exbrace is needed.

[@noanyobiseniss7462]

How not to die, never finish it? Just kidding I just couldn't pass that one up! Love your vids! :)

[@bryanford1139]

3:26 Nice pet spider :)

[@magnusdanielsson2749]

There is a channel called wjp004 with a man who has been building rallycars for years. He has alot of tips on fibreglass construction for high end vehicles.

[@BuilderCreator]

I'll have to go check it out. Thanks for the suggestion, always looking for good KZbin content!

[@GrantOakes]

Scrapping the sides is important but so is the bottom! Cut your tongue depressors at the end to allow you to properly scrap the bottom.

[@BuilderCreator]

All of my smaller cups have ridges in the bottom and the round end accesses those low spots, although your suggestion would work on a good flat bottom mixing cup, of which I'm to cheap to buy. Ha! I think the real answer is the amount of time mixing. Stiring the batch just a few more times, has not failed me. I don't think I have had a failed batch of epoxy in over ten years.

[@curvs4me]

Roll structures 😡😡😡😡😡 That's a very sore subject with me. Of course you can make a roll structure into the car that would support 40 tons on the car using high modulus carbon covered with Kevlar to avoid shards and spikes in the event of an impact. You can do the same inside of the car doors. However, none of that is acceptable. You need a ridiculous 1 1/2 or 1 5/8 mild steel or cromoly tubing roll cage going everywhere in .118 or .083 wall thickness. It has to be fully welded with no bolted components. To make it invisible somewhat you have to use it as structure for A pillar, B pillar, under dash pedal and accessory mounts, roof skin mount and get certification. Then build the interior over it. Obviously video documenting the build and certification process. Every sanctioning body varies but I don't know of any allowing removable cages.

[@BuilderCreator]

The upper levels of TimeAttack is the only place where I might likely venture, so it would be an "event only" bolt in system. After looking over those rules I think we can manage it. First off I would have to get the car done, then become proficient enough to even compete. Ha!

[@curvs4me]

@@BuilderCreator I think you should will do great! Cast all fear and concern for life and limb aside. Drive like you stole it 😉. It sounds like a joke but that's the only way to focus on nothing else. You have to trust that your safeties will protect you should something go poorly.

[@Stoneface_Garage]

There are boltin options allowed, such as in SCCA. Check the rules. Here's an example of how to use tube connectors for this. kzbin.info/www/bejne/o6DRaYGimtJ9irM

[@curvs4me]

@@Stoneface_Garage That's a beautiful system! NHRA previously allowed 1 5/8 cromo and bolt in cross bar and door bars. They have upended everything and changed to 1 1/2D 0.083 wall cromo or 0.118 wall steel minimum cage perimeter and uprights. Every organization/sanctioning body eventually gets to bureaucratic for it's own good. They make rule changes annually to justify their bloated existence. Cages can not only be made with composites effectively, they can be made far stronger. Tubular components are not a necessity. A lot of the European Bodies allow for composite safety cages. There have been no deaths or serious injury in drag racing at 6 second and longer run times for 16 years! 16 years ago you could run in the 10s without a cage at all. Now anything less than 11:50 requires an 8 point fully welded including the floor mount pads cage. Under 8:50 requires a full tubular prison cell around you. It's ludicrous. They should also give major credit to newer vehicles. They're made with lighter materials by area but a lot more of them. Roughly 1000 pounds (half a ton) heavier than their 60s and 70s counterparts. That's just me venting. However, when bodies make rule changes for the sake of making changes when no injuries have occurred what is the point. They start going insane dwelling on things that are a billion to one odds against as if it's a given.

[@johngreen8693]

You never wear gloves yet your hands always seem clean and unaffected by the resins (apart from that one "nip" from a piece of fibre in one of the vids) - what's your secret?

[@DavidG2P]

Aaaah, so many air pockets in the laminate on both sides of the roll bar?

[@rocketsurgeon1746]

Why not use carbon fiber bidirectional and uni for those small areas?

[@BuilderCreator]

I will be using carbon when its benefits rise above what S-glass can provide. If you haven't seen this video here is the first carbon parts- kzbin.info/www/bejne/hGKmq42YjN2Hhas

[@herrboeing]

a doubt, wouldn't it be more rigid to put an entire layer making only a few minimum cuts necessary just to better accommodate the layer on the mold?

[@souk-tv]

1:30 If Bob Ross made cars.

[@yves3560]

I keep wondering how much the finished car will weigh ?

[@BuilderCreator]

Trying for somewhere between 2400 lbs (1080Kg) and 2800 lbs (1270 Kg), we shall see. Budget is forcing me to use more steel than aluminum so the weight is pushing up a bit.

[@thatwolffe3802]

@@BuilderCreator are you planning to powder coat the steel or paint it?

[@BuilderCreator]

@@thatwolffe3802 all the small individual pieces are powder coated, but leaning toward painting the subframes.

[@florianj6490]

Big spider on the top left in 3, 2, 1 3:26

[@jakeadams1423]

3:34 big spider top corner

[@BuilderCreator]

Shop mascot

[@bfairfax8772]

NASA and SCCA are the governing bodies that hold time attack and as for track days most tracks have their own days but they usually use SCCA regulations for race cars and for street cars you just get a basic safety inspection . Though most of those days have limits on passing and driver aggression that will end your day if you drive unsafely . You can integrate the roll cage into the cars structure a removable cage IE a bolt in one isn't really legal for any racing that I know of I know that NASA here in the Mid Atlantic won't allow a bolt in cage in a time attack car . It's possible to race in some street classes of rally cross without a cage but only the lowest classes and your motor and the fact that it is a prototype so it doesn't have a class would make you have to race in the highest class available for the type of racing you wanted to try . It would still be fun you just might be stuck running with GT3's and Ferrari's or old NASCAR's .Oh look up the SCCA and request (buy ) a rule book figure you'll need whatever the minimum cage is for a fiberglass monocoque with a rear steel tube sub frame . I know there are race cars built this way I just can't think of an example that you could look up in the rule book ,but there's no way to have a removeable cage in a car that makes it race legal . It needs door bars for starters and it needs a bar under the dash as well as above the windshield at the roof line . A hoop doesn't really cut it , maybe to make yourself feel safer on track days .

[@BuilderCreator]

Yeah, it becomes a little hazy when you come along with something different!

[@jaromgillins3808]

@@BuilderCreator not sure if its been answered. But in my design I'm using the rules for the Pikes Peak Hill climb unlimited class, as it is some of the more strict regulations in the USA

[@bradmaas6875]

en.wikipedia.org/wiki/National_Auto_Sport_Association starting point for info

[@petertelford4900]

You really need some to show you how to fiberglass properly, your car looks so nice you've done so much work , but you have to many air bubbles in your layer's. Stop thinking less resin means lighter no less resin means not a good bond . It's like cement you put steel in cement to keep it together but the cement is the strength like fiberglass you need more resin .and a bloody roller . I'm not a troll I know what I'm talking about I do this every day for a living .

[@johngreen8693]

Interesting comment Peter (I am NO expert). Does the squeezing he does with a plastic scraper make a difference?

[@petertelford4900]

@@johngreen8693 high John , first it's not a plastic scraper it look like an old bank card , and yes it does make a difference because he is not applying the right amount of force to make a proper bond and he leaves to many air bubbles in , air pockets is like cancer .

[@debbiecrane3683]

You need a curved roof and its go to be electric.

[@Thunderd0me]

i have a friend in france, he build a ford gt 40......

[@irmaosorio351]

first

[@petertelford4900]

It slips off because you are not using a roller

[@larrysorenson4789]

Never try to ensure a car with a roll bar. Removable is the only way to go. Insuring this car should be a big enough ordeal without the roll bar anyway. And for heavens sakes take driving classes now just to get ready. Do not learn to drive in your fantastic creation; heart break is just one power induced oversteer backwards into the barrier. Just saying.

[@benheynen2705]

You said 8.113 yet measured 8.015! Also what's an oz? Didn't we all go metric?

[@richardsmith9509]

How not to die in a supercar??? Hate to say it, but don't drive in this car......ever

[@richardsmith9509]

I know , I know.....Jay, your lack of skill on driver protection is very sad: its your life and you seem completely unconcerned. There is so much more that you could (should) do.....Can't imagine the osterich response

[@captainsubbot7101]

I like the video, but please stop smacking your lips so often. Especially when you're that close to the mic

[@BuilderCreator]

Sorry, but I always eat fancy French Croquembouche while I'm editing/narrating video- smacking the lips is required. And, yes they are tasty!