Foils for amphibious waterkart

Looks like I might have to tone down the amphibious abilities to navigating shallow water and launching and retrieving. This is due to the Australian laws on bikes and mobility devices. While the laws on watercraft are more relaxed and have prototype and experimental categories. This makes things easier to engineer as bouncing over dunes and ruts won't be required

If a mod is reading, please change thread title to 'Water E-Kart for flats with foils'

Thanks

 

We have some rules and guidelines now:
To be able to drive out of the water, it needs to be road legal. It needs to meet the rules for a pedal powered device like a recumbent trike. This limits the motor power being applied to the wheels to 250w

For marine use, the power limit is 2.9kw without requiring registration

This limits me with power to the wheels but 250w seems adequate for land use while observing the E-bikes on the beach. This leaves me with a 2kw prop on a secondary motor that is not connected to the wheels for a marine boost. This, will keep within the rules for not requiring a registration in either environment

My aim is to build this and see if it will have a reasonable performance. There is an option to fit larger marine power and register the craft as a boat. Thoughts?
I

 

More reading from the material email to me from Transport QLD. Another option is the personal mobility device category which covers things like E-scooters. This is limited to 1.2 m x .70 m x 1.3 m in dimensions. At this stage of the build, only the aluminium for the 1.8 m x 1.3 m frame has been cut for an adult and another for my daughter in a lighter version

Also, the only electricals ordered so far are the two previously mentioned 8" 250w motors, battery and controller. These finally got shipped and is tracking in transition to my local post office. I am thinking to use one on each frame for the wheels and add a 2kw motor with a prop and a water sensing switch. Thoughts?

 

An australian road legal mobility scooter, wheels pushed through a jetski hull, telescopic long tail prop steered by the handlebars, basket at the front for toy poodles or chihuahuas . I think E bikes need an EU compliance sticker on them, yes in australia, and it must not be modified in any way, to be legal. They gotta catch you first though. And illegal is just a sick bird.
Your rims may roll you along on the land, but I think used as propellers sideways it will be difficult to steer, you may need a huge rudder to make it track forewards more than prop walking sideways. I too had a good idea cancelled because of stupid, rediculous, draconian bureaucracy, backed up by enthusiastic professional complainants, and their gleeful fines.
The split powering system to stay 'land legal' will have to be light, and simple. Maybe 1 or 2 wheels use the low power setting, and the 2 other wheels / props take full power when in the water.
Back to basics, a 'legal' E bike laid down on a sheet of thick canvas, making a coracle, with a bracket somewhere useful for an electric outboard motor. No ride in and ride out ability, and all electrics need to be waterproofed, but more quickly doable. Backpack the canvas and bits while riding the bike, then sit on the bike as a boat frame; need to loosen the headstem bolt to twist the handlebars flat.

 

Vehicle standards is an eye-opener to the excess in design. Does personal local transport still need to be heavy cars? Don't get me wrong, I truly enjoy powerful cars like my Mines prepared 8 cylinder Lexus that I had back in Sydney. But I also feel that the days of such cars on the road is over. I find equal thrill in the motorised devices

Also, I still don't understand this turning the wheels 90 degrees to use them as propellers thing. For this to happen, the wheels would need to be drowned. Is this not right? If the wheels are drowned, then why the need to turn them 90 degrees when a 90 degree duct would vector the thrust back? I cant see this in use anywhere, am I the first one to connect the neck bone to the hip bone on such use in an amphibious?