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Throatwarbler posted:So what's the silver tank for? Fuel? My guess is coolant or oil. Don't know why the resevior had to be there though.
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Aug 21, 2012 07:34
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SFH1989 posted:Yeah when it was a drag only car it had a built reverse manual valve body TH400 with a 5000rpm stall torque converter. The 5spd has changed it a lot. Driving it now is very interesting, almost feels wrong (in the best way possible) to drive on the street. Where's the stick on the LTD? 
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Aug 26, 2012 06:43
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red19fire posted:F1 Hovercraft Racing. I'm amazed there's not more safety gear involved, since they drift the poo poo out of these things, and they seem prone to rolling over. Drifting is literally the only way to change your vector on a hovercraft.
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Oct 3, 2012 20:00
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Itzena posted:Peugeot Onyx concept car from the Paris motor show: Let's fast foward a few years:  I'm sure it's coated to prevent petina, but I like to think it's not 
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Oct 4, 2012 04:50
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GentlemanofLeisure posted:The most AI way to transport your smart fortwo? I bet that would be fun to get into an accident with.
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Oct 6, 2012 01:16
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If you said you could show me an intake that looks like a towel rack, I would have called you a dirty filthy liar. Also that open mesh ground wire is hilarious.
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Oct 15, 2012 05:10
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SkunkDuster posted:A video of a guy that fabricated and built a 12cyl motor with about 1cc of displacement. It appears to be powered by compressed air, but still - Its hard to get over how misplaced that soundtrack is. Also being someone who has designed most of an engine, I can truly appreciate how difficult that is as well as his choice to go air powered instead of figuring out how to cool and lubricate that thing. rcman50166 fucked around with this message at 00:26 on Nov 6, 2012 |
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Nov 6, 2012 00:22
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Detroit Q. Spider posted:Man I really hope this gooses hydrogen development as a fuel. The most abundant element in the universe and the only waste product is water vapor? Yes please. From what I understand, the methods of producing hydrogen currently aren't sustainable. This means it currently requires more than a BTU to make a BTU's worth of hydrogen and bring it to market. This includes generating it, compressing it, and transporting it. There is a similar issue with corn based ethanol. But the United States likes corn so much they do it anyway. 
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Dec 14, 2012 18:12
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I think everyone is misplacing judgement here. I like the Prius, it's filled with useful technology to make it cheaper to own and friendlier to the only planet we can occupy. But I loathe the dickheads that drive them. Note I didn't say all drivers who drive a Prius are dickheads.
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Jan 4, 2013 20:10
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West SAAB Story posted:but the fact that the suspension is gone along with the chrome and handles isn't that big of a deal amirite? I'd imagine it's the same reason people thing Desert Eagle .50 AE are cool guns. It's a step away from normal. But some just don't understand which direction in the AI plane it goes in.
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Jan 17, 2013 00:12
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I took an engineering class specifically designed to teach shear, bending and torque. It's pretty easy to design for and single point shear is considered ethical engineering design if proper analysis has been done. Also as long at the mount isn't threaded. That is considered poor engineering regardless of how high the safety factor is.
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Jan 20, 2013 18:45
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Rev. Dr. Moses P. Lester posted:What do you mean exactly, "as long as the mount isn't threaded"? As long as the cantilever that experiences the shear force isn't threaded it is ok. An easy way to fix this is to simply use a shouldered bolt.   Crustashio posted:You just design for the reduced area, I've seen a lot of perfectly safe designs that use single shear bolted connections. Rear shocks on my car mount to the hub in single shear with one bolt and they will punch through the upper mount before they shear that bolt. I've seen a lot of shoulder bolt connections in manufacturing that have lasted for a very long time. Ideal design is a double shear, straight pin connector but in the real world engineering requires many compromises because of space or ease of assembly. That is the problem. You don't design for the reduced area. Stress risers experienced during shear make it more vulnerable to failure than a rod of the same diameter as the minor diameter of the bolt thread. That assumption is one of the reasons it's a no no. You may have seen plenty of designs but it's not considered ethical engineering because a better solution exists with minimal design change. rcman50166 fucked around with this message at 00:50 on Jan 21, 2013 |
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Jan 21, 2013 00:45
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kastein posted:I see single shear in mounts all the time - for instance shock mounts are frequently single shear. The point I'm making is single shear design is okay. Single shear (or any shear for that matter) on a full length threaded bolt or any bolt where shear takes place on the threaded section of it is not okay. Examples of that is seen everywhere including older F1 cars. But it's still poor engineering and unethical if designed deliberately despite knowing the problems caused by it.
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Jan 21, 2013 01:05
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BoostCreep posted:He's gonna be pretty pissed when his 3 year old smashes his fancy LED headlights into walls in his house because it's fun. There's a reason kid's toys are made of lovely cheap plastic and rubber. If I were to guess how much all of that would cost to custom build, assuming it was a retail purchase, I would put my guess right around $20,000. The CF shell being the most expensive part. A full size car of that build quality would be through the roof.
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Jan 21, 2013 21:06
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Octopus Magic posted:Why are you so dead set that you think his 3 year old is going to break it? Three year olds break everything. I work at a portrait studio. There isn't anything they won't try to break. I'm sure dad is around to keep an eye on the car/his son though. Fake Edit: Beaten
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Jan 21, 2013 21:26
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Everyone shutup and look at this thing. Just popped up on my Facebook feed from Top Gear. http://www.topgear.com/uk/car-news/bugatti-veyron-volkswagen-beetle-render-2013-02-07
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Feb 8, 2013 20:59
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Terrible Robot posted:"Probably one of the only cars in the world driving without camshafts". Yeah, you know, apart from the hundreds of thousands of Wankel powered cars out there. I know this is a page back, but I have done A LOT of research with camless valves from my supermileage days. It turns out that nothing but a mechanical system will use the least amount of energy from the engine. This is because the cams are mechanically linked directly to the source of power. There are massive inefficiency losses with trying to convert engine power into another motive for the valves. Like to use electromagnets for example requires converting mechanical engine energy into electrical energy which converts back into mechanical energy to drive the valves. Two conversions with efficiency losses between them. The research I have done have covered pneumatic, electronic, and hydraulic. All have the same conversion loss. The name of the game is going to be trying to get that efficiency back. Analog devices like mosfets are getting more and more efficient all the time, converting less electricity to heat. Along with this, you can design the electromagnet to consume less power and output more force by making the magnet larger and run at higher voltages. Like electrical, efficiency gains for pneumatic and hydraulic solutions come from using better pumps, lighter fluids or gasses. Running at higher pressures is similar to running higher voltages for the electronic equivalent, less energy is lost in the system. Another thing when considering all of these losses are the gains in performance. As of right now they do not outweigh the losses, however experimenting with the valve wave form, valve action, and other variables may one day change that. There is also the question of what you are aiming for. If it is pure power output capability, a camless system is ideal. The losses don't matter so much in a high performance setting like racing. If you are after fuel efficiency, not so much. The losses actually consume more fuel than they save with current engine technology. Finally, the last thing that needs consideration is durability. Mechanical cam systems do wear, but very slowly in comparison with camless options. Pneumatic/hydraulic lines fatigue, pumps wear out, batteries age, etc, all at a much higher rate than a valve-train or timing chain/belt. Advances in material engineering may cover this one day. But, "Will we still even be using gasoline at that point?" is the real question. TL;DR Camless systems aren't practical...yet. rcman50166 fucked around with this message at 07:05 on Feb 21, 2013 |
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Feb 21, 2013 06:41
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kastein posted:I wonder if the valve closing could be harnessed, similar to regenerative braking? Actually, designing the valve solenoid circuit correctly could result in a circuit that's mostly resonant at the right frequency to open and close the valves at the right times, so the driver would just have to "pump" the circuit to keep it going and make up for the portions where valve lift wouldn't exactly match the result provided by the resonance alone. This would only really work well with engines running at a set RPM, or with drivers built with multiple banks of capacitors to stay "nearly resonant" (low Q factor would obviously be required here...) at most engine RPMs. I think it would go very well with a CVT, keeping the engine at the same speed at all times would greatly simplify the resonant circuit + valve solenoid driver circuit design. I actually have some insight on this as well. Sikorsky has been recently researching into hydraulic energy recovery systems to reduce the amount of hydraulic power that is needed to change rotor angles (which happens once per revolution, so thing rotor twisting back and forth so fast it might as well be vibrating) in their helicopters. As far as my university, which works closely with the company, has come up with, there isn't really a lightweight, efficient, reliable, or even cheap solution to this. The initial idea is to dump the high pressure fluid returning from the valves into a pump or other energy generating device to be put back into the pumping system. So far nothing has worked out. rcman50166 fucked around with this message at 07:02 on Feb 21, 2013 |
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Feb 21, 2013 06:59
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GramCracker posted:Thank god I'm not the only one who feels that way. God forbid there is more content than a picture dump thread  . But in the interest of letting the majority influence what this thread should be, I have been thinking about starting an auto tech thread in which we sperg over engineering and new technology. I PM'd IOwnCalculus to check his opinion on the matter as it would overlap content with other threads. But I am curious to find out how many people would think another seperate thread would be a good idea. And to keep on track, have a picture I took at the Limerock Historic Festival in 2012. I made a thread about it but it never got past page 1, so I figure most of you haven't seen a lot of the photos. Feel free to tell me I'm wrong though. 
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Feb 22, 2013 18:34
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You Am I posted:Holy poo poo that site is like Geocities quality circa late 90s Early 2000s, actually. The last photo they uploaded to that site was in 2004.
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Mar 11, 2013 14:38
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SyHopeful posted:Keep it going! Gon' comment fishin'. Let's see if I get a bite.
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Mar 13, 2013 05:12
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Powershift posted:The megarule is loving terrible. First you combine 3 threads into 1, then ban discussion from said thread. Just so you know, I started the Automotive Technology Thread to discuss the exact stuff that this thread used to talk about. Anyone is encouraged to cross post into there to talk about a picture. Prius chat welcome.  The best car butte.
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Apr 21, 2013 01:32
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The craftsmanship on that waste gate 
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Jun 9, 2013 23:05
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Regarding turbos, I did a writeup for my thread. Feel free to ask anything there: http://forums.somethingawful.com/showthread.php?threadid=3541899&userid=0&perpage=40&pagenumber=2#post414450582 Short answer is twin turbos can be set up for a wide power range, or a buttload of power in a certain range.
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Jul 11, 2013 01:27
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I was thinking to myself, "Wow, what elegant plumbing", then realized it didn't have any sort of intercooling.
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Jul 17, 2013 02:55
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Carteret posted:A quick google says yes, amazingly. I wonder what they were thinking on the engineering side to justify that, besides the The only thing I can fathom is re-using that runner from a different car to save money on engineering.
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Jul 23, 2013 00:46
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reaction.
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Rev. Dr. Moses P. Lester posted:Went to the NHMS Vintage road race event over the weekend. Saw some cool stuff. It's an RX-3 From the Lime Rock Historic last year:   
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Aug 8, 2013 23:55
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14 INCH DETECTIVE posted:Also new post for this one just because it needs to be isolated. Don't care if those cars are in good condition or not. Those are totaled in my eyes. Now the better question is how to burn the cars without setting the field surrounding them on fire.
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Aug 18, 2013 16:15
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Went to the Lime Rock Historic Festival again this year. Have some AI.         
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Sep 4, 2013 00:45
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IOwnCalculus posted:I've got to go with the last wingless cars. In regards to F1, I think the beauty comes with pure function. The cars get prettier every generation IMO. There isn't a single surface that wasn't meant to be there.
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Sep 7, 2013 18:07
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MrChips posted:At the risk of raising the ire of The Worst Posters, I disagree. The cars of the late 1970s and early 80s (the ones with the double rear wings and whatnot) aren't exactly pretty, and the cars they've run in the last three or four years are pretty ugly too. Nah, it's cool. We all at F1 cars in some form or another.
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Sep 7, 2013 18:38
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Tanz-Kommandant posted:
With "internet price" listed on the website, I was let down when I did not see an "add to cart" button.
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Oct 1, 2013 21:37
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OptimusMatrix posted:I've never seen a paint job like this. Pretty awesome if you ask me. This looks like the stuff that they use in various kids toys to make them change color. All of the dolls with color changing hair come to mind.
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Oct 6, 2013 16:45
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Wasn't sure whether to post this in the youtube thread or here, but figuring as I made it I thought it'd be more appropriate here. Enjoy. https://www.youtube.com/watch?v=y0BYUZxAFJ0
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Oct 12, 2013 03:45
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Kilonum posted:I was at LRP for that race as well (and the ALMS race in July) I am finding that as I have posted this in a few subforums, that quite a few goons went to the race. We should make a meet or something. jamal posted:A fast car got some new stickers: Bare CF is actually bad for a car, given it's not an aesthetic outer layer. The UV in sunlight will actually break down the epoxy used in the lay-up. 
rcman50166 fucked around with this message at 01:04 on Oct 14, 2013 |
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Oct 14, 2013 01:00
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Boomerjinks posted:Today is a good day to repost this. I legitimately thought I went cross eyed when I saw this.
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Oct 14, 2013 20:44
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Anyone else think the wheels don't really add anything to the design? It makes it look a little cluttered.
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Oct 19, 2013 17:02
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That Miata has seen some poo poo.
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Oct 27, 2013 16:12
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Throatwarbler posted:My favourite example of this is the Ferrari California. This is fantastic because that is the car I love to hate.
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Oct 30, 2013 20:54
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NitroSpazzz posted:I had a massive image dump ready then we lost power for ~10 seconds and for once I'm on the desktop instead of the laptop. So instead you get this, the 1974 McLaren M16C. I loving love turbo piping. Anything cool preventing the need for the inter-cooler or did people just not know then?
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Dec 20, 2013 04:03
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