With their sleek shells providing both protection from the elements and an aerodynamic advantage over bicycles, human-powered velomobiles do offer an intriguing alternative to cars. Unfortunately, though, they can't go as fast as automobiles, meaning that they often still have to be ridden along the side of the road. Minneapolis-based inventor Rich Kronfield wants to change that, with his Raht Racer. It's an electric-assist velomobile that amplifies the rider's pedaling power, reportedly allowing them to move as fast as the cars around them.
Most velomobiles consist of a recumbent tricycle body, enclosed by a full aerodynamic fairing. Some of them also have an electric-assist motor, although the top speed possible with these is usually limited to around 20 mph (32 km/h) – any faster, and they'd have to be registered and insured as motor vehicles.
Kronfield apparently thinks that would OK, though, given that users would still save all the money they'd otherwise be spending on gas.
Instead of directly driving the wheels, the Raht Racer's pedals are connected to a unique flywheel generator that powers the vehicle's 20-kWh electric motor (located in the rear wheel hub). As with regular pedal-assist electric bicycles, this system senses the torque being applied to the pedals by the rider, then uses the motor to amplify it. In the case of the Raht Racer, however, it's supposedly amplified to the point that an average adult should be easily able to maintain a cruising speed of around 30 mph (48 km/h) – or over.
Some of the pedaling power is also used to charge the 9.2-kWh li-ion battery pack, helping to extend its range. That battery gets its full charge from a wall outlet, between rides. If used in throttle-only mode, in which the rider does no pedaling, it has a range of approximately 50 miles (80 km). Full-out, throttle mode will take the vehicle to a top speed of 100 mph (160 km/h).
The two-seater Raht Racer itself has a carbon fiber body with an aluminum roll cage, and includes features such as headlights, tail lights, seat belts, air bag, trunk space and full suspension. The current prototype tips the scales at 570 lb (259 kg) so yep, it's a good thing that it's not purely human-powered.
It all sounds pretty intriguing, and it will be interesting to see if the Raht Racer lives up to the hype. If you want one, though, you'd better plan on it saving you a lot of gas – its estimated price is between US$35,000 and $45,000. Should you still be interested, Rich and his team are currently raising production funds, on Kickstarter. A pledge of $250 or more will get you on the waiting list.
You can see the vehicle in action, in the following video.
Sources: RahtMobile, Kickstarter
I don't really expect something like this to be cheap but at $40k it costs more than Chevy Volt or Nissan Leaf and doesn't come with the $7,500 tax incentive that a regular vehicle would have.
Outrider USA makes decent Y config hybrid trikes for about $10k. They are smaller (
Two thots: it really needs to have at least limited (and controlled) tilting, so that it will lean into corners a bit. Secondly, Mr. Kronfield needs the right partners in this. I'll reiterate Zero motorcycles... if he was able incorporate their drive-train technology and manufacturing efficiencies, the price *surely* wouldn't be that much more than a fully-loaded SR. And think of the performance numbers he'd get! Likely close to double the range, and top speeds wouldn't be an issue at all! And keeping the trike configuration, registration remains in the motorcycle realm. It would be a frickin' thing of beauty! Then, add a few practicalities, such as a set of voluminous-yet-sleek panniers, and he's got gold!
(Note to Mr. Pecoraro above: the front-trike layout is far more stable than a rear-trike design for rollover stability! Add in a tilting chassis, and this sucker would rock! Look up the European "Tripendo" cycle to see what I'm talking about!)
Something like this might be OK out on the salt flats, but in the real world, it's just an accident or death waiting to happen.
But experimenting is fun and a great way to learn new lessons...keep at it!