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Rolls-Royce builds the Sweptail, a beautiful one-off boattail coupe

When it comes to custom-built cars, Rolls-Royce rarely fails to impress. Its latest creation is this one-off coupe called the Sweptail. According to Rolls-Royce, it was commissioned by a collector of bespoke machinery, and the car's design inspiration was the coachbuilt Rolls-Royces of the 1920s. The end result is an enormous Rolls-Royce coupe with a beautiful trailing boattail design. It looks like a hyper-expensive boattail Buick Riviera in the best way possible. A glass roof sheds light on a particularly plush interior. There are only two seats in the massive coupe. Where rear seats would have gone, are shelves made of wood and glass for storage. Wood veneer, consisting of ebony and paldao, is found everywhere in the car, even in the cargo areas. The darker wood trim is also accompanied by light colored leather. The Sweptail has a few little tricks up its sleeve, too. Opening the suicide doors on either side will reveal platforms for attache cases. The cases are designed to carry the occupants' laptop computers, and they're constructed from carbon fiber, wrapped in leather, and finished with aluminum and titanium hardware. Between the seats is a chiller that comes complete with crystal champagne flutes and a bottle of champagne from the year the owner was born. The trunk is also filled with custom-fitted luggage. Being a one-off, you won't be able to buy one of these coupes yourself. But it does show the capabilities of Rolls-Royce for doing special automobiles. And, who knows, if you have the money and connections, you might be able to have your own unique Rolls-Royce commissioned. Related Video: Featured Gallery Rolls-Royce Sweptail View 14 Photos Image Credit: Rolls-Royce Rolls-Royce Coupe Luxury Special and Limited Editions

Rolls-Royce electric airplane smashes record, hits 387.4 mph

Just two months after its maiden flight, Rolls-Royce's "Spirit of Innovation" has hit a top speed of 387.4 mph, tentatively smashing the speed record for electric airplanes, Gizmodo has reported. It also claimed the top speed of 345.4 MPH over a 3 kilometer (1.86 mile) course and lowest time to a 3,000 meter (9,843 feet) altitude (202 seconds). The records have yet to be certified, but if the 345.5 mph speed stands, it would beat the current record of 213 mph — held by a Siemens-powered Extra 330LE — by an impressive 132 mph.  Rolls-Royce (the aviation, not the car company), conducted the tests on November 16 as part of its ACCEL (accelerating electrification of flight) project. To have the records certified, it's submitting the trials to the Federation Aeronautique Internationale (FAI), the body in charge of world aviation records. If confirmed, the speeds would be pretty impressive considering that the plane only made its maiden flight in September — suggesting that with more time, it could go even faster. 51690212450_7e8bcb3ad8_k View 12 Photos The Spirit of Innovation is an old-school "tail-dragger" airplane (steering at the rear) with the canopy pushed way back, and looks as fast as it goes. It's powered by a 400 kW (535 HP), 750 volt motor. Rolls-Royce said it uses the "most power-dense propulsion battery pack ever assembled in aerospace," with 6,480 cells.  As Engadget detailed in an explainer, electric airplanes aren't practical since current batteries are 50 times less energy dense than jet fuel. However, they do hold some promise for very short trips, like a 30 minute jaunt between Vancouver and Victoria in Canada. And unlike non-turbocharged ICE engines, electric motors retain full power as an airplane climbs, making them ideal for time-to-altitude record attempts — as the Spirit of Innovation has just shown.  Green Rolls-Royce

Rolls-Royce Cullinan and BMW 8 Series spied south of Death Valley

Recently, we've stumbled upon a number of manufacturer prototypes running around. Usually, spy photographers sit and wait for hours with cameras primed in order to get a few shots of a car. We just got lucky. First, we caught the new Chevy Corvette ZR1 convertible during a Facebook Live video. A week or so later McGraw snapped a video of a ZR1 coupe cruising in his neck of the woods. Today, our ace photographer Drew Phillips caught a BMW test fleet filling up the new Rolls-Royce Cullinan and 8 Series coupe in Baker, Calif. Baker sits along Interstate 15, about halfway between Los Angeles and Las Vegas. It's just south of Death Valley, and, being late August, suggests that BMW was doing some hot weather testing. Drew was filling up his car when the fleet rolled in. There were at least two of the new king Rolls and a single 8 Series. Both cars were wearing a full swirl camouflage wrap. It's not an uncommon place to see prototypes. Still, seeing a whole fleet roll in is quite a sight. We've seen official photos of the Cullinan before, but these pictures give us our best view of the profile and rear we've had so far. From a distance, it looks like a high-riding version of the new Phantom with a hatch in place of the trunk. The taillights are obviously just filler units. Expect the final version to look very much like the squared off LED units on the Phantom. Likewise the interior and engine should be straight from the Phantom. That means a twin-turbocharged V12, though power is likely to be sent to all four wheels. We've seen the full BMW 8 Series concept a few times now. The proportions on the production car look the same, with a long hood and even longer wheelbase. The nose isn't quite as aggressive as the concept, but we expected the styling to be toned down to meet crash and safety standards. As for engines, look for six, eight and (hopefully) 12-cylinder power under the hood. A plug-in variant is also expected. Both cars have been in development for a long while, so look for full debuts sometime this auto show season. Maybe we'll happen upon some more test mules between now and then. Related Video: