Hmmmm mixed ideas on it.
My opinion.
Good, innovative, clever.
Slow, uses lots of power, inefficient.
Me thinks for the same amount of power, 4 or 3 independantly orientated wheels with fat flotation tyres will do the same thing 10 x as fast, 10 x further.

I absolutely love it. maybe the most impressive and simple invention I have ever seen. Great job.

It\'s ridiculously slow. If you make a concept device, then make it properly, as the british guys say. (:

If they paint the \"legs\" in fluro-acid colors this fella would be a best guy on trance party!

I would like to pass on an idea to this wonderful engineer: why not have small \'teeth\' on the screws that operate using magnetic power? The teeth would protrude to give traction, but in a situation where they were a liability, a small electric current would pull them in, using magnetic force. The screws would have to be hollow perhaps, to house the teeth and magnets, but as an engineer, he could likely come up with some cunning design. Or maybe they lie flat on the screws like hairs until released from magnetic force and allowed to \'bristle\'. Just a thought:)

I am not saying it's stupid - the guy has obviously put in a lot of hard work and time to get the screws synchronising to drive it in any direction. I just can't think of a use for it, that it would do better, than say driving wheels on driven spinning castors (shopping trolley wheels). IF he could find solutions that this, and almost nothing else except this, can either do or do way better, than anything else - he might have a winner.... It does have a unique range of features, functions and combinations of functions - as well as drawbacks and impediments. I think the secret to this is to capitalise on both, what it can and cannot do... But compared to say something like an RC model car with say castorised wheels - and covering ground quickly and efficiently - it cannot compete. It has to be something different, or how can it travel or in what can it travel IF the coils where set at different angles or orientations, or if the coil were swapped with vertically steerable propellors...

It would work much better if the screws were mounted straight out, and with an automatic proportional mixing speed control so none of the screws drags along or gets pushed.
It\'s obvious the operator is manually controlling the direction and speed of the three screws. Get an automatic control system on it so the operator only has to wiggle a single joystick and it\'d be much faster.

This device could be used for landmine detection, maybe?

Small flaw. but great for mine clearing and moving in rough terrain.
To fix your design do not have ends, they need to loop back onto the frame work.

OK imagine this....
A BIG radio controlled toy car, a STEERABLE caster - holding a wheel at each corner.
Each of the wheels has an electric hub motor.
Thus the \"radio controlled car\", can more or less instantly change direction, and head off at great speed.
It can do everything that the \"tri-screw drive\" can - but WAY faster, and for all the hysterics about obstacles like non stop volcano ejecta type bolderous terrain - there is in fact very little of the more or less impassible terrain in the entire galaxy.
Perhaps 0.000001% of the surface is impassible.
So the caster wheeled car with it\'s nice soft wide balloon tyres with knobby tread, can go almost every where.
QED.
So what is it that the \"tri-screw drive\" can do, or what places can it go, that the caster wheeled car cannot do or won\'t go?
What is it\'s principle advantage? How can it be used?
There is something clever in it - but I just can\'t think of it.
Think electricity, copper wire coils, and magnets.. One solution is electric motors, another is voice coils in speakers, and another is on and or off relays and circuit breakers..
But the tri-screw drive - how can you use that?
I\'ll offer a prize for the best answer.