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Old 08-21-2013, 10:54 PM   #101 (permalink)
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I have new-found respect for whomever you are referring to.
That would be moi.

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Old 08-21-2013, 11:08 PM   #102 (permalink)
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Old 08-21-2013, 11:56 PM   #103 (permalink)
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Originally Posted by GoGogebic View Post


I am in the mood to rain on this parade, so get your umbrella out. Don't worry, the criticism is meant to be constructive.

I think you are totally on the right track with the single occupant commuter idea. These people that are wanting a passenger seat or big cargo capacity are... well, they are looking for cars that already exist. The solo commuter car is a need that is definitely not being filled. And chances are, for the majority, it will remain unfilled as long as people are able to afford eating and driving, and not one second before. That said, I think Vetter is right to demand at least a touring motorcycle level of utility of his ultimate commuter vehicle. Think of how often you throw some stuff on the seat or in the trunk and what an inconvenience- and expense when you have to make an extra, special trip to get the "real' car- it is when you can't.

It's long and low and red; that's all quite nice.

But the approach and departure angles look minimal, as in, driveway entrances and intersections and snow and whatnot look like they will result in scraping if not high-centering. I thought the whole reason you wouldn't consider a trike or bike was to go through snow.

Those fenders are waaaay too huge. They will act as rudders and steer the wheels, which is too bad because you want the wheels to do the steering. Even the Edison2 Very Light Car appears to have evolved away from turning fenders, if that is what they are. There is no need nor aerodynamic benefit from them being that big; in fact I am going to argue that in a crosswind- the most common condition- they will make aero worse.

Why are they open to the insides? Splash will go all over everything- including the canopy- especially when the front wheels are turned.

Canopies: often dreamt about and rarely thought through.

They will create the nicest solar oven ever. And you won't be able to lower the window or hang your arm out.

Know how irritating it is when you can't quite get the visor in your current car to shield the sun? How are you going to shield your eyes with a canopy? With a visor?

It will be expensive. It will be plastic. Plastic will scratch if you try to run wipers on it. Does it have a shape that wiper(s) can conform to? So no wipers? Good luck, especially with that fender splash. But... but... motorcycles and airplanes have plastic windshields and no wipers. Yeah, well you aren't fogging up motorcycle windshields with your breath because you're basically outside on them. And when you do get caught in the rain on a bike you are basically looking over the windshield, not through it. Airplanes generally don't encounter much in the way of dirt and bugs and whatnot between flight legs because they are mostly above it all. But their windshields often do leave much to be desired as far as visual clarity.

How much does a canopy cost? A lot more than a windshield.

How often do you need to replace windshields? Often enough.

Then there are the optics of attempting to look through a sheet of material:
1) at such a shallow angle as this.
2) with such curves and waves.

What is that fin on top for? Rear view cam? Does it have to be up there? There's already a big flat spot on the back end.

Wow, for multiple protrusions with all those suspension arms. Most un-aero. Sure they may have teardrop-profile tubing or sheathing, but still. There would be substantial interference drag. It's like when Cessna built planes with wing struts and without; much faster and more efficient without. It would be like when Cessna put retractable gear on the Cardinal; the fixed gear version had a single spindly strut per faired-in tire but still the Cardinal RG (retractable gear) picked up more speed- and the RG doesn't even bother to hide the gear behind faired-in doors when it's up! Look at the Edison 2 for a good example of minimizing suspension aero drag. BTW I think their fenders were too big too, but they might be OK.

It looks like there is no room for feet and legs to move. Is that comfortable? Perhaps, but for what purpose are you denying yourself legroom? The body balloons out in the midsection so it's not like there's any less frontal area. An acceptable turning circle should be possible along with some footroom. It's the long tails on the front fenders that are the biggest obstacles to having a sharp turning radius but even more importantly, I see no means of attachment for the fenders!

This has been going on since at least May 2011 and there was five years for ideation/gestation before that. I know those CAD seats ain't cheap. You could have had several prototypes or mock-ups for less than the CAD by now.
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Old 08-22-2013, 05:39 PM   #104 (permalink)
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GoGogebic -- I may have posted this before:
Notice the relative proportions of the wheel/fender and the main body. Also notice how there is a bullet-proof section inset into the front of the plexi bubble, like an F-86.

The world will try to pull you back to the middle of the road. You'll have to fight continuously. Here's some ammunition:
electromagnetic radiation - Why does NASA use gold foil on equipment and gold-coated visors? - Physics Stack Exchange
TL;DR: gold leaf on the inside of polycarbonate,

Black over red is always in good taste, but what about Polar Silver (L-324, Ditzler 31549) over Koral Rot (VW L-351, Ditzler 70782)?

Frank Lee -- I'm not stalking or anything, just curious
"Frank Lee" CAD - Google Search
The seat time at a CAD system that I put in was laying out pre-fab roofing trusses. Not exactly aerodynamic—the selling price of a house is determined, not by the floor plan, but by how gnarly the roofline is.
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Old 08-22-2013, 06:31 PM   #105 (permalink)
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I've noticed those McMansion roofs and was always glad I didn't have to shingle them.
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Old 12-29-2013, 12:52 PM   #106 (permalink)
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Its a cold rainy morning, and I just decided to sit down at the computer and see what was what. I don't normally post on forums, just enjoy reading. Though I got to reading this post, and like so many other posts I've read of other folks, it spends years tossed around in trying to design something on the computer, but nothing gets built. Either trying to figure out what materials to use, or trying to make an impractical idea practical. I used to have this problem also. I had all kinds of ideas on what I wanted to build also. I wanted to do this, I wanted to do that, etc, etc. I wanted certain aerodynamic features, I wanted that for power. And guess where it got me. No where. Nothing got started, nothing got done, but a bunch of sketches. One day I sent an email to Jory of Moonbeam fame, and asked a few questions. And in one of his responses, got an answer I needed. I doesn't matter how you get started, as long as you get started. All the planning in the world doesn't do any good, unless you get out in the garage or wherever with some parts and start building.
So instead of over planning, I went out to the garage with a few simple ideas, and just started building. I knew I wanted seating for two. I knew I wanted three wheels to classify as a motorcycle. I also have a lot of limitations. I have work, kids, I have extremely limited funds. I have to work within my means and abilities. It means that while it may not be all that I imagined, it will be something that I built, over something that I just dreamed about building. I'm not worried about snow, because honestly, I probably won't drive it in the snow. I have a regular car to drive for that. In the snow, I'm not worried about mpg, I am worried about making it to where I am going. Its something to drive all the other times. Truth is, a car built for ultimate mpg commuting is not going to be good for 100% of your needs. Its purpose built to fill a certain need. But the more practical you make it, the more use you will get out of it. If the front kisses the ground every time I pull in or out of the driveway, then I won't want to drive it as much.
Granted that it is not finished yet, but every weekend I get a little further. Buying parts when I can. A lot of which come from the junkyard. Spindles from one old car, steering rack from another, windshield glass from yet another car, etc. If you have the money and ability to fabricate parts out of exotic materials, great, if not, use what you can find and know how to work with. And have a good imagination. Best thing I did was take ideas of making something other people might want, and chucking them in the far corners of the garage, and making something that works for me. Something I enjoy, that functions well and fills the void of needing a car that gets good mpg for commuting or running to the store for dogfood. I don't want to set up a build log, or even post pics, except for maybe when its done. For those of us with minimal amounts of time, these are traps.
I guess what I am saying is, damn the torpedoes, just start building.
Sorry for rambling.
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Old 01-02-2014, 06:23 PM   #107 (permalink)
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Looking forward to your post.

I know where you're coming from. Just Do It™

In my case, having a garage would be nice. A carport with an attached shed is the best I've had since the dirt-floored chicken coop. I do have space in a barn 12 miles away; I get there once or twice a month. Is you garage heated?

That said I'm happily stuck in the learning phase. I mocked up a partial boattail and then I stepped up to a full boattail and then I saw a CFD animation and now I think just killing the vortexes off the rear fenders would suffice.

Quote:
Best thing I did was take ideas of making something other people might want, and chucking them in the far corners of the garage, and making something that works for me.
QFT [quote for truth]

The Original Poster's last post was the August update.

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The sheetmetal chassis is literally a laser program, 4 hours of laser time, and a few hours on the pressbrake away. I still have work to do on the body though.
Maybe we should stick a fork in this one.
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Old 01-03-2014, 12:32 AM   #108 (permalink)
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I guess this does not matter, but the tail end does not make sense to me. The fenders taper, so why does the body flatten out?
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Old 01-12-2014, 07:28 AM   #109 (permalink)
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Maybe we should stick a fork in this one.
I think your right. This one is done. I am hoping that this project is getting regrouped. The DIY battlefield is littered with good intentions, ideas and unfinished projects. I am hoping mine doesn't end up that way. I really don't get support from my other half, so I found it best not to tell her I am up to anything of importance or interest to me. And I have learned to work in 30 to 60 minute intervals to reduce being suspected of anything at all.

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