Testing Videos and pictures
This page will be slowly updated as I get time to make more content.
Wiillchair 4 1
How chair 4 looks in her ready-to-roll state.
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Unassuming and doesn't stand out.
This is the third chair, W3.  They get used hard.  I can do this all day on one battery charge.  Higher voltage, a big battery, and properly spec'd brushless motors are a good combination.
This is an older version.  It had a different chassis configuration with less caster trail and more rearward weight bias, making it quite agile and great outdoors, easily hopping over 6" diameter logs.  It was geared for about 15mph.  Now, 15mph doesn't sound fast until you're doing it on a glorified barstool through a rough field.  Imagine hitting a hidden sun hardened 12 inch tall ant bed or gopher tortoise hole at this speed.  I don't have to imagine it.  The PTSD is real.
You can see just how much the front suspension is worked as well as the beating the front caster barrels take.  This chair was built in 2012.  The caster barrel bearings have never been replaced. This is really too fast for daily high speed bumpy trail use. It's not quite stable enough. It needs about a 6 inch longer wheelbase, a 4 to 6 inch wider stance, and 1 to 2 inches more caster trail, but then it would be useless indoors and not fit in a car to drive from. Compromises.
Noise warning!  The camera is mounted rigidly against the frame right over the gearbox and tire, amplifying the sounds and vibration.  It's barely audible in person.
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The chassis covers were 3d printed from PETG.
Wiillchair 4 2
It will tilt about 42 degrees for pressure relief and remain pretty stable.  The feet also elevate to parallel with the seat.  They are height adjustable but do not extend.
Wiillchair 4 12
I have not found nor designed a legrest extension mechanism durable enough that's not too heavy.  I often carry 50 pound bags of dog food, grass seed, groceries, children, etc on them.
Wiillchair 4 4
Side layout.  Wire routing and strain relief must be considered for the suspension travel and tilting.
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The lights are motorcycle headlights and easy to aim.
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The sidebox was 3d printed.  Good place for truck keys, wallet, food I drop, and whatever else you keep in a purse.  Extremely useful.  Much better than between my feet or on the ground.
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Those are not the factory shock springs.  I found some that would physically fit with the correct rate and installed them.
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The holes are to reduce weight, add a little grip for my feet, and let mud and water fall through.
Wiillchair 4 3
The rear tires are Kenda Super Turf 15x6-6 mower tires.  The wheels are spun aluminum halves with 2 inches of offset on the inside half and 2.5 inches on the outer half.
An earlier build with more rearward center of gravity in this video.  Beach going is possible as long as it is not too dry and fluffy.  Care must still be taken to avoid plowing in the casters and getting stuck.  The more recent builds can go also with care.  The more speed you can maintain the better. Avoid sharp changes in direction.