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Captain Hybrid

Slideshow: Urbee Developer Shooting for 290 MPG

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Jerry dycus
User Rank
Gold
Re: Government regs
Jerry dycus   9/19/2014 1:11:43 PM
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Hank, 1200lbs is plenty for safety in such a small car if done right. F-1 certainly does.

But the Erbee is rather heavy as I'm doing to similar EV's in normal, better composites that only weight 800-900lbs with 100+ mile battery range, 8kw range extender yet 2x's stronger than a steel car using  medium tech composites. 

Also they can be built far faster than printing, popping one or more every 15 minutes if one wants. And at lower cost.

Plus the printed body/chassis is just the start, you still need to build it not unlike any car.

The big difference is I won't design, build a car as low as the Urbee as just not safe.  You need to see and be seen.

Also going up mountains on 7hp is going to be problematic. Can it get over the Rockies?

At lower weight, 8kw RE and 100 mile battery range that will be tight getting over the passes.  The Erbee, marginal. 

 

bobjengr
User Rank
Platinum
Re: URBEE
bobjengr   4/5/2014 2:57:01 PM
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Hello Battar--I agree.  My dad is 91 and does NOT drive anymore but I can't get agreement that we need to sell his car.  It absolutely DRINKS gas, but I continue to pick him up in it just to show him we still have it.  Nuts--I know.

Jerry dycus
User Rank
Gold
Re: Mind-boggling MPG
Jerry dycus   4/1/2014 10:36:17 PM
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It is hard to get that kind of mileage and only with charging the pack a couple times added to the gasoline range will they be able to if they are really good and go about 40-45mph. 

Vs a real MPG test the battery should be the same charge at the end without outside recharging, just from the gas motor output. Likely under 150mpg that way.

Not sure what material they use for the body but unlikely it's anywhere near as storng or as light as one laid up in composites by hand.  Even faster!!

For instance my version body/chassis likely 4x's as strong as a printed one at less weight.

Just the composite body/chassis weighs just 235 lbs including doors, hood.

Now I can do 100 mile battery range[220lbs] and EV hybrid drive in 380lbs and tires, suspension, seats  and all the other things about 300lbs more. 

  That's only 915 lbs for a larger stronger vehicle so what gives with the weight?  It seems to weigh as much as a steel one and 2x's my weight for the body/chassis that uses no CF.

Another is while aero is nice, it's not worth dying for!  Visability through glass at that angle is terribly distrorted and so low can get lost in traffic and run over.  I watched a similar size, strength 68? Lotus Europa just driven over/through by a 65 Mustang, only a 2800lb car at the time.

Luckily it drove over the passenger side crushed to near the ground luckily not over the driver who survived.  Thus why my subcars are 2x's stronger than steel ones and 52'' high.  See and be seen is an important safety feature and you, they can't do either 40'' off the ground.

Printing's time is coming but way too costly and other limitations like time to print is days  for this size means they need to do far better.  

My body/chassis is about 5 manhrs to build, less than printing or even a metal one.  And I'd bet my $1200 total costs parts/labor is less than the printed ones material/ink.

Battar
User Rank
Platinum
Top speed
Battar   4/1/2014 9:40:29 AM
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Nobody mentioned the top speed on 7HP while going uphill (unless the dog is pulling, sled-like). I could probably overtake this thing on a bicycle, doing 45 miles per hamburger.

Battar
User Rank
Platinum
Re: URBEE
Battar   4/1/2014 9:34:12 AM
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BobJ,

       Come over here where gas is 8$ a gallon, and you won't be driving a fuel-happy Buick. You'll learn some respect for terms like "energy efficiency", or "fuel economy",

bobjengr
User Rank
Platinum
URBEE
bobjengr   3/23/2014 5:06:10 PM
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I know I'm saying the obvious but this concept would make an ideal commuter car.   For around town, it would be excellent.  Interstate, not so much unless "crash-worthiness" considerations were met.  I certainly agree with Bill in that issues with repair of damage would be important to solve up front.  I love that fact that the engineering community continues to think about pushing the limits relative to MPG.  I just filled up my dad's car for $3.30 per gallon.  About $ 60.00 total for his Buick.  Thank you Charles for again keeping us up to date as to what's happening in automotive.     

 

William K.
User Rank
Platinum
Re: Government regs
William K.   2/21/2014 3:43:33 PM
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I would be very happy to get a consistent 50MPG in a good handling vehicle that was not priced like a luxury race car. And I really DO NOT care quite so much about the crash worthiness, since I avoid having crashes. But avoiding crashes often requires good handling. A river-boat car is a pain to drive.

Bunter
User Rank
Platinum
Re: Government regs
Bunter   2/19/2014 9:22:07 AM
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Hi William,

Hexcel does still exist.  Aerospace applications, etc.

I remember the name from the skis they made in the late '70s (I think).

 

I like the Urbee project, they are pushing the limits in several areas.  The result will not likely be people scooting around in thousand pound 300 mpg pods-more likely is it could be a step toward a four passenger vehicle that weighs 1800 lbs and gets 70-100 mpg with reasonable comfort, utility and safety.  That would be cool.

 

Cheerio,

Dennis

William K.
User Rank
Platinum
Re: Government regs
William K.   1/22/2014 11:20:08 AM
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Charles, In our area there used to be a company named "HEXCELL" that produced honeycomb materials, both custom and standard. But it seems that a lot of their product was made from Nomex and epoxy, or some other resin. Probably it would not be as cost effective as 3D printing is today.

And I have been attempting to visualize a way that 3D printing could replace the damaged portions of a 3D printed panel. That could be a game changer, possibly.

Charles Murray
User Rank
Blogger
Re: Government regs
Charles Murray   11/7/2013 9:25:03 PM
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Repairability is a very good point, William K. As far as I know, the only way to build this honecomb structure is by 3D printing.

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