When the trucks first pulled into the presentation site, they made a large U-turn in front of the audience before being parked and the snug fit between the back of the cab and the trailer could be seen to open with what looked like hydraulic rams creating room for the cab to turn. The gap immediately closed again as the rig straightened up, eliminating the gap that creates significant aerodynamic drag on conventional rigs.
That innovative feature on the Semi is entirely in keeping with its streamlined cab and surely contributes to the claimed coefficient of drag (cD) of only 0.36. As Musk pointed out, the $2.7 million Bugatti Veyron supercar has a higher cD of 0.38. Also adding to the vehicle's efficiency is the use of four independent wheel motors on the two rear axles of the cab. This avoids the mechanical losses of driving the wheels from a single motor and enables electronic traction control.
Inside the cab the driver's seat is in the centre and placed well forward, leaving room below and to the rear for what is surely a massive battery pack, and while it appears to be large enough to accommodate a sleeper, it is a day cab configuration. In place of the usual collection of levers and switches there are two touch screens mounted either side of the steering wheel.

According to AirSpaceX, US$300 billion dollars in fuel and productivity costs a year are wasted in traffic jams and other delays in the United States alone. Additionally, urban drivers spend 42 hours stuck in traffic each year, while pumping 38 billion pounds (17 billion kg) of carbon emissions into the atmosphere.
Designed and built by AirSpaceX parent compant Detroit Aircraft Corporation (DAC) at Detroit City Airport, Mobi-One is targeted at the point-to-point commuter market as a clean, quiet alternative to road transport that relies on "lean automotive design and mass production techniques" to be affordable to produce.
Mobi-One uses four wing-mounted electric motors that the maker claims makes the aircraft quieter than a helicopter. It's designed to carry two to four passengers or payloads of over 200 kg (440 lb) at a cruising speed of 150 mph (241 km/h) over a range of 65 mi (104 km).

Along with its pilot assisted/autonomous flight avionics, it also has broadband connectivity for high speed internet access, V2X collision avoidance, and safety messaging. Aside from passenger and cargo services, it can also be used for medical and casualty evacuation; tactical Intelligence, Surveillance, and Reconnaissance (ISR); and research flights.
The Mobi-One was developed in cooperation with Camilo Pardo, who was the chief designer of the 2005 and 2006 Ford GT. Completion of the aircraft's engineering packages are still the primary focus, but the hope is that a full-scale version of the craft will soon be available for US FAA certification.
"Our goal is to deploy 2,500 aircraft at the nation's 50 largest cities by 2026, targeting existing infrastructure at first," says JP Yorro, Chief Commercial Officer at AirSpaceX. "The MOBi development program will be capital intensive, but air Mobility as a Service could generate billions for the economy. We are considering a broad array of financing options, including potential fractional ownership interest and profit sharing models."

On February 6 at 3:45 pm EST, the first Falcon Heavy rocket lifted off from Launch Complex 39A (LC-39A) at NASA's Kennedy Space Center, Florida on a demonstration mission. Due to the tremendous complexity of the new booster and the 50/50 chance that the mission might end in failure, no active satellite was carried in the nose cone of the vehicle. Instead, Mr Musk's own Tesla Roadster was used as ballast in a gesture that he characterized at a post-launch press conference as a ridiculous bit of fun.
At the conference, Musk confirmed that the core rocket that made up the center of the three-part first stage of the Heavy did not have enough propellant aboard to make a soft landing, and hit the water at about 300 mph (480 km/h). He went on to say that, if the onboard cameras survived, "There could be some pretty fun footage."