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Kevin Bullis is Technology Review’s energy editor.

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Friday, April 17, 2009

Taking the Segway-GM Puma for a Test-Drive

It's fun. But as with the original Segway, it's hard to imagine it catching on widely.

At the New York Auto Show, GM and Segway showed off a prototype vehicle meant to transform urban transportation: the Puma (Personal Urban Mobility and Accessibility). The reception of this vehicle online hasn't been very positive, and comments overheard at the auto show suggest that sentiments were similar there. ("There's your bailout money," said one disgruntled man, shaking his head. A woman said it looked like a baby carriage.)

But after taking a ride in the vehicle (see the video below), I've had a change of heart. I still think it's an awkward-looking machine that will almost certainly fail as a mass-market vehicle, but the thing is very fun to ride around in and, I imagine, even more fun to drive. People with plenty of money lying around are bound to want to buy it if they get a test-drive; they'll figure out what to use it for later.

Getting into the vehicle was something like climbing into an amusement-park ride. Strap yourself in with double shoulder belts, and a roll-bar arm snaps into place. When you board, the vehicle is tilted forward and resting on a pair of training wheels. But once you're inside, it lifts itself up and balances on two wheels (the seat remains still but the surrounding cabin tilts back and forth). You get the vehicle to go forward by pushing on the steering wheel, causing the cabin to tilt, and you stop it by pushing against the front of the cabin with your legs, much as you lean forward on the original Segway to move forward and lean back to stop. In the prototype, both the driver and the passenger can stop the vehicle by pushing forward--something that will change in a production vehicle (I was advised to keep my legs relaxed and let the driver do the stopping).

The most distinctive part of the experience is the turning. The vehicle balances as it comes to a stop and then spins in place--that's a level of maneuverability you won't get in a scooter, which really could make the Puma a pleasure to drive around a congested city. The steering wheel isn't mechanically connected to the wheels: it's "drive-by-wire," which is key for future plans to automate the vehicle. While I doubt people will trust the automation for driving around on busy roads, it could be a cool feature for parking garages. Just drop off the vehicle at the entrance, and let it park itself.

Still, the Puma seems unlikely to sell very widely, and it isn't just the cost, which will probably be pretty high compared with a bicycle or a scooter.

The thing looks ungainly, and not just because it's a prototype: the conceptual drawings for a finished product look even worse. The problem is that it perches unnaturally on its two wheels, and although seeming to defy gravity may sound cool, the result is just awkward looking (and the training wheels on the front don't help).

At a panel at the auto show on the future of automobiles, journalists and automakers argued that a car is more than just a mobility device. When you arrive somewhere, it makes a statement about you. For that reason, I can't imagine many people will want to make this their main vehicle. They might coast around in one in the privacy of an estate. Or take a spin in one at an amusement park. But I doubt many people will want to arrive at their destinations every day in a vehicle that people compare to a rickshaw and a baby carriage.

(Note: In the video, that's not me getting into the Segway at the beginning.)

Comments

  • interesting
    It solves some of the problems with the original Segway. A mode of transportation should be comfortable so now at last you can sit versus stand. And if it rains or is windy at least you are now under a roof and behind a windshield. But still the problem remains: where do you put your briefcase or grocery bags?
    Rate this comment: 12345

    SVE
    04/17/2009
    Posts:48
    Avg Rating:
    3/5
    • Re: interesting
      Actually, you'd be surprised how much stuff you can carry on a Segway. I regularly carry my very large laptop; I also regularly do grocery shopping.

      The handlebar bag will carry a gallon of milk handily, with room to spare. The side bags will carry even more. A backpack is an option -- I carry a large one. You can even tow a wagon. (In addition to grocery shopping, I've towed my wife and daughter in a parade -- so the towing capacity is significant).

      (Obviously, towing reduces your ability to turn in a small space!)

      The PUMA looks like it would handle a briefcase and modest groceries -- or an entire shopping cart if you are alone.

      Remember, too, this is the INITIAL prototype, without all the details worked out. Cargo carrying is certainly one of the things that needs to be explored and optimized.

      You might be tempted to think that all that cargo would throw off the balance, but you'd be wrong. If you add a bunch of weight in the back, the wheels will have to be further aft, of course. I don't know if that means a change in the control position, or a change in the amount of tilt -- it depends on how they set it up.

      But it's amazingly hard to unbalance a Segway, and the same principles will apply in general terms to the PUMA.

      It remains to be seen how the PUMA will evolve -- and how a more refined one would integrate with people's lives. If I had one, I might be able to get rid of a car (used for transporting my daughter), and rely on Segway for most things, PUMA for the trips where I currently have to use a car. (A bit over 1/2 of my miles are via Segway. I've traveled over 2000 Segway miles in the past 10 months -- not counting the miles spent on ferries and trains (and yes, car) with my Segway).

      Getting rid of a car would yield a lot of $$$ savings, and a LOT of space freed up in the garage!
      Rate this comment: 12345

      Bob.Kerns
      04/18/2009
      Posts:1
      Avg Rating:
      4/5
  • Efficiency Test
    Before long energy efficiency will trump all other concerns both in terms of production and operation.  I would like to see a prototype that can be fabricated in my back yard.  Replace most of the structural elements with bamboo.  Put the designs for the drive train on the internet open-source style and and we have a winner.
    Rate this comment: 12345

    David.l.sieg...
    04/17/2009
    Posts:1
    Avg Rating:
    1/5
    • Re: Efficiency Test
      I think that once plug-in vehicles become moee common, people are going to be looking at their electric bill more carefully. If something like this uses a small fraction of the power, it's gong to start to make more sense to people who don't need multiple seats.
      Rate this comment: 12345

      Monsterboy
      04/18/2009
      Posts:89
      Avg Rating:
      4/5
  • Puma needs
    In moving from prototype to production model, the Puma will need fenders over the big wheels to protect the occupants from water kicked up by the tires if the pavement is damp.  Also the passenger's suit jacket would be worn threadbare on the lower right side if he rode any distance with it touching the wheel.  A lightweight plastic door panel covering the bottom half of the sides might do the trick if there is a way for it to clear the wheel, but both will obviously add weight.
    Rate this comment: 12345

    rwhitr
    04/25/2009
    Posts:1
  • Good luck with...
    And just where is one supposed to drive the PUMA?

    On city sidewalks? Good luck with cities allowing motorized vehicles on city sidewalks.

    In dedicated PUMA traffic lanes? Good luck with cities installing dedicated PUMA traffic lanes.

    On city streets? Good luck with cabs, trucks, 18-wheelers,...

    What a waste of taxpayer bail-out money!
    Rate this comment: 12345

    Tom999
    04/27/2009
    Posts:1
  • How about a detachable rear
    I know its a weird idea but how about adding a detachable rear to the PUMA. This attachment should make the PUMA look exactly like a small car with space for 4 people. And when there is no requirement of the rear carriage it could operate just at it does now. The maneuvering can be transfered to the rear pair of wheels when in a full car mode. I know there will be higher engine power requirements but I think it can be worked out. The purpose is to make the vehicle more mainstream and less weird on first look and so it can become more acceptable.
    The idea of PUMA is really good one to just let it go by. I just can not stop imagining these vehicles replacing cars and SUVs on those busy roads.
    Rate this comment: 12345

    satyavr
    05/06/2009
    Posts:1
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