Wesll lean on four wheels

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Combining the high ground clearance and wheel travel of a motocross bike with the unparalleled grip of four leaning wheels, it looks like Wesll Corp (no relation) may have found a way to combine the attributes of two- and four-wheelers to achieve an exponentially greater result.
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Wesll’s secret is in a leaning mechanism that consists of two control
arms and hinges on the unsprung side of the shocks. The lower control
arm is decoupled from that shock, allowing 28 inches of travel, which
in turn permits lean angles Wesll claims are in excess of 50 degrees.
Because four wheels have more grip than two and leaning shifts the
center of gravity lower and to the inside of a corner, these machines
should also have more cornering grip than equivalent non-leaning quads.

This mechanism claims to allow the above advantages with gaining
significant weight because the unsprung components lean, therefore only
requiring load-bearing ability in one direction as the machine isn’t
subject to the same lateral loading as non-leaning four-wheelers.

We’re impressed by the concept’s apparent ability that’s evident in the
videos; it looks like it rides like a motorcycle, but slides like a
quad. That’s cool.

The Wesll concept differs from machines like the Piaggio MP3 not just
because it has four wheels, but because it’s able to lean so far over.
The MP3 is limited to a 40-degree lean angle and employs its extra
wheels for safety and stability, not performance. A better analogy
would be the Brudeli Leanster, which is performance oriented, but
still lacks that back will, meaning there’s less grip available for
cornering and acceleration.

In addition to the dirt bike, Wesll has mock ups of its leaning system
on sportsbike. We look forward to finding out how well the system works
off-road and on.

Wesll Corp

  • uberbox

    that is the coolest thing I have ever seen! It’s like a sandrail crossed with a dirtbike.

  • http://www.benstansfield.ca Ben

    cool stuff. i’m very impressed with the suspension travel, even if a road-biased quike? wouldn’t have quite as much travel. seems like a HUGE safety benefit, especially to one such as myself, who has dropped a bike or two in gravel and rippled road. wondering what effect this set-up would have on all-weather capability, or around-town squirtability….

  • Todd

    In the video the rider shows the articulation of the suspension by rocking the bike back and forth, and that reveals the flaw of this design. Look at how much effort it takes to make the bike lean!

    A two wheeler is dynamically unstable – you don’t fight against any damper to make it lean from side to side. A 2 wheeler naturally wants to fall over, and that is why the Piaggio MP3 design works – you don’t fight against any dampers holding the bike upright when you turn in to a corner. Or as in the Carver three wheeler, you use a motor to force the chassis to roll and negate the operator input needed to make the chassis lean.

    This bike leans, but probably only to the extent you muscle it over – not a smooth, easy progression like a 2 wheeler. I’d bet a pizza that it doesn’t ride much differently than a regular IRS quad with a long travel suspension and soft shocks. This design just seems to enhance the chassis “rolling” around the roll centers of the front and rear independent suspensions. A true leaning 3 or 4 wheeler would lean effortlessly to duplicate the fun of a motorcycle.

    But on a positive note, I love those wheels! Any idea if they are bespoke or factory?

  • Chris

    At 40 seconds in to the first video and 10-20 seconds of the second video display how the rider can stay very stationary while manipulating the lean of the quad.

    I’ll bet your pizza plus a side of garlic knots that it rides nothing like an IRS quad, not including off-camber landing. Like riding the “>http://www.superbikeschool.com/machinery/lean-bike.php> Lean Bike or the “>http://www.superbikeschool.com/machinery/slide-bike.php> Slide Bike.

    I can barely ride a quad properly because of how I need to position my body. A leaning quad like this would bring my life a small step closer to satisfied.

  • Chris

    At 40 seconds in to the first video and 10-20 seconds of the second video display how the rider can stay very stationary while manipulating the lean of the quad.

    I’ll bet your pizza plus a side of garlic knots that it rides nothing like an IRS quad, not including off-camber landing. Like riding the Lean Bike or the Slide Bike.

    I can barely ride a quad properly because of how I need to position my body. A leaning quad like this would bring my life a small step closer to satisfied.

  • SwaggeringPagan

    Todd,
    if you consider that action “muscling” then perhaps you should consider a less taxing hobby, for instance needlepoint or scrap booking.

    While it does appear that the ‘bike’ for lack of a better term is somewhat self righting, it appears fairly effortless to attain the lean angles shown in the videos. I say somewhat only because at one point in the second video you see the vehicle by it’s self and not in motion and it does list to one side a bit but doesn’t just fall over. I think this is a good thing rather than something to mince about.
    As seen in the photo section:
    http://flickr.com/photos/wesll/3187243342/
    http://flickr.com/photos/wesll/3187248196/

    • Chris

      The quad wants to lean when you turn the handlebar. Like sitting in your car and turning the steering wheel when you’re sitting still. The car’s lean/camber/whatever changes.

  • sam

    does it have to slide to turn well? like could it be road legal? cause i bet it owuld be really fun, and safer than a street bike cause of the four points of contact

  • http://weroam.wordpress.com Darek

    I wonder how truley off road you can get this thing. I’ve hit some good size objects at speed with quads and they take it like a champ. I wonder if these thinner lighter wheels would be damaged. Also, Are these all only two wheel drive?

  • gerald kimpton

    You should get a helmet

  • Tsais

    How come you don’t hear from them anymore since 2009, they’re like disappeared.

    I still want one. Where I’m going, the DOT is no problem :)