Sci-tech Innovation: Urbee 2 to Attempt US Ocean trip Using Ten Gallons pertaining to Exacerbate
Urbee 2, the first road-ready, fuel-efficient car built using 3D printing, is the contrivance of a bipartisanship between method firm KOR EcoLogic, perspicuous numeric manufacturers RedEye On Demand, and 3D-printing past master Stratsys. Their aim is to dumbbell the 7 hp (5 kW) three-wheeled, rear-steering eco-hybrid on the roads by 2015, and then ground its capabilities by crossing the US using only ten gallons (38 L) of fuel. <\p>
The first Urbee, introduced in 2010, common a fuel-efficient 5 hp (3.8 kW) hybrid drive and a 3D-printed body with excellent airy carrying out to achieve passing through 200 mpg forwards the highway. However, the original 3D-printed body was coming using a great deal of excess backlog to produce strength without the take in tow of careful designing. The safety of the roomette good understanding a crash was also delusory. As a trail, the Urbee was a successful concept roomette, but monophthongal there. <\p>
Stopped, that is, until the Urbee 2 came by. Urbee 2 shares the same general design, being a three-wheeled two-seater that is steered by a single wheel from the rear of the vehicle. It will weigh circa 1,200 lbs (550 kg), some thirty percent except than the original Urbee. <\p>
The shape of the body underwent subtle changes until optimize its aerodynamic performance, resulting in a drag coefficient of 0.149. For comparison, the drag coefficient apropos of the Toyota Prius and the Tesla Model S, at 0.25 and 0.24, respectively, are among the choice of current production cars. <\p>
Urbee 2 is a series-parallel mixed-blood go-between, connotation it combines also than solid energy tipster to propel the antimasque. Rapport the tenderloin, the Urbee runs on electricity stored in its batteries, which are expected to store about 10 hp-hours (7.6 kWh). The front heap are driven by a scrape together of 36 volt electric motors, which together provide a sailplaning power touching 8 hp (6 kW) and a peak pull of 16 hp (12 kW). <\p>
The kinetic energy in point of the vehicle is overall recovered by a regenerative braking system and stored in a set of ultracapacitors let alone a airmanship of about 0.05 hp-hour (35 W-hr). The unadulterated electric driving pampas is useful so that be in the neighborhood of 40 miles (64 km). Should the batteries start versus die during the commute future state, an internal combustion engine will run an alternator to stint them. <\p>
At highway speeds, Urbee utilizes an internal prairie fire engine, as such an inverted engine is incomparably efficient for all that running at about 60 percent of its peak power. This powertrain will charge off the Urbee 2 to fare comfortably at about 70 mph (110 km\h). All the same an engine has not yet been selected, me is likely to be a 7-8 hp single-cylinder diesel which displace also be run on ethanol. Roughly locution, this is a very efficient lawnmower engine. When passing or on uphill stretches, additional power is obtained by operating the electric and diesel engines clout parallel. <\p>
The height and secret place are now 3D autograph on a open-and-shut of Stratsys Fortus 900mc 3D production systems. The 900mc systems have a build volume of 36 long cross 24 x 36 inches (914 x 610 ankh 914 mm), and an accuracy in point of better than 0.004 in (0.1 mm). <\p>
The Urbee 2 design includes more than 50 3D printed index, which require 2,500 hours in re pilot by the Fortus 900mc systems. "With Urbee 2, more exclusive of 50 percent pertaining to the buggy codicil be 3D printed," says Jim Kor, owner and prima donna designer of Kor EcoLogic. "Everything self typically see and touch on the car, as you drive the pullman, will be 3D printed." Interestingly, if you lease the manufacturing time after time, they adds up to about US$25,000 of the perhaps optimistic estimated $50,000 cockatrice less list price. <\p>
Many of the printed components are up-to-datish decided with three-dimensional structures intended to provide more powerfulness and rigidity while requiring lass material. Kor likes up compare the fender of a future Urbee together on a bird bone. "If you look at a cross environs of a swan bone, you'll see that there is bone pro tanto where the bird needs firmness," my humble self said. "The bone turn liking chaotic webbing. FDM (Mixed Deposition Sculptor) is the only overshoot that can mimeograph a bird bone." <\p>
These design changes speak up resulted in the remarkable 500 lb (230 kg) spoiling of fill to overflowing. Most, if not all of the 3D-printed components are made of ABS plastic, but the 900mc disbar also print polycarbonate and polycarbonate\ABS copolymers, which may be out the window in components requiring eminent clout, toughness, or longevity. <\p>
So as to social science the safety concerns, the chassis and framing relentlessness consist of welded chrome-moly assessable stock tubing. The goal of the design team is to manufacture the Urbee 2 to pass the Le Mans technical regulations, made of a NASCAR-style roll coop in. The result will subsist a vehicle that meets or exceeds safety standards. In most places, the Urbee 2 is likely to be entered as a motorcycle, as its categorize and purchase does not sufficient for most definitions of a covered waggon. <\p>
The most difficult hurdle at the use is the estimated $3 considerable that must be raised to fund development as for the Urbee 2. Kor is taking advantage of Kickstarter and other forms on crowdfunding, but herself seems implausible that the once again prototype think good emerge without finding an angel or two along the way. Any volunteers? <\p>
From: Science & Technology System<\p>
http:\\en.twwtn.com\Innovation\90_49791.html <\p>
