Now that looks like fun. I wonder what size pump is commonly used? The 56mm motors can run 10 hp or more and fit in a small place. Same with lithium batteries, but I bet it takes a lot of them for that kind of performance & runtime.

Yes. I would assume the batteries will be the biggest cost if any reasonable level of run time is desired. They are not the biggest expense with our RC speed boats, but you are talking about 5-7 minutes at full power at best for us.

We'd spend more money and add more packs to our boats for greater run time, but that also adds weight and additional weight kills performance, so a compromise somewhere between light weight and long runs has to be found.

This one (from the movie on the previous page) has a 4400W motor, and weight is a total of 12KG...without the battery. Top speed 35-40km/h
For the rest they are quite poor with data:

http://www.onean.com/producto/carver/#products

Wow, this 56 mm TPPower motor produces 6500 cont. watts (up to 12K max) which equates roughly to 8.7 hp. I'd like to know more, but it is prolly proprietary info.

Originally Posted by sundogz

Wow, this 56 mm TPPower motor produces 6500 cont. watts (up to 12K max) which equates roughly to 8.7 hp. I'd like to know more, but it is prolly proprietary info.

More info:
http://tppower.com/sort.asp?class_id=4&news=155

Thx John, I know about the motor, what I meant was I'd like to know more about the jet drive (size of impeller, etc.). But that might be difficult to find that info out - it's probably proprietary info.

Originally Posted by sundogz

Thx John, I know about the motor, what I meant was I'd like to know more about the jet drive (size of impeller, etc.). But that might be difficult to find that info out - it's probably proprietary info.

Indeed!

They only state they have designed the jet drive themselves. Nothing more...

MHZ specs two of their Jet 52's or one Jet 64 for electric surfboard applications.

Wow, never seen those jetfoilers before, interesting stuff.

Like everyone else, I have also been keen to do a electric surfboard. Maybe I should redesign the jet to a larger diameter to say 60mm and do a board??? ......hmmmm

Mick, I think your drive would do very well at that large scale end of things since it appears to be the closest thing to a full scale drive that's out there right now.

For me, the reason I've held back so far is the considerable cost involved with a project like this, with the batteries likely being the biggest chunk of that as mentioned. However, when you compare the cost of doing it yourself vs. purchasing an existing product, it is substantially cheaper.

I think the best board to use for this application would be a Bic like this:
http://www.bicsport.com/surf/boards/...er-magnum.html

It's a legit surfboard with a decent longboard shape and FCS fins, but made of plastic and therefore easy to cut/rebuild/reshape. It's also 3 3/4" thick, so enough room to stuff in batteries and such.

I would give the MHZ drive a go too, since they also are pretty scale like.
Indeed the "Beez" 30mm drive is the most scale like. I am about to receive one soon for my RC boat project

Those jet foilers use a straight carbonfibre pipe with the impeller in, and a reducer at the end.



I have seen a picture of the foil itself, but it was on facebook. Not on google unfortunately

Hi there, like everybody else I would like to built my Elec jet surf. regarding the motor controller and propeller I think I am right but I am totally lost about the board....The best board for me should be like the jet board... So do you have any advice where could I find a similar shape... that I can dig ?

many thanks in advance.

Hello guys.

Best of all, I'd love to purchase a jet kit.

- I like the Scorpio 520, but I have no idea of what sort of prop it needs to deliver proper 4000 to 5000 watts under water, remaining energy efficient

- That company seems to use in 2014 a 15KW engine with a 100m prop
http://jetsurf.over-blog.com/2014/10...lectrique.html

- TPpower looks great but how many KV / prop should I choose ?

- What about that one from HK ?
https://hobbyking.com/en_us/turnigy-...0cc-equiv.html

- Well-known
Hacker https://www.hacker-motor-shop.com/Br...=37100006&p=34



Any suggestion or cheaper alternative ?

Many thanks

Originally Posted by philgib

Hello guys.

Best of all, I'd love to purchase a jet kit.
We will soon have the 3D printable jet drive ready for testing.

- I like the Scorpio 520, but I have no idea of what sort of prop it needs to deliver proper 4000 to 5000 watts under water, remaining energy efficient
What is a Scorpio 520?

- That company seems to use in 2014 a 15KW engine with a 100m prop
http://jetsurf.over-blog.com/2014/10...lectrique.html
That is a big prop! (kidding) You meant 100mm

- TPpower looks great but how many KV / prop should I choose ?
With what/for what?

- What about that one from HK ?
https://hobbyking.com/en_us/turnigy-...0cc-equiv.html

- Well-known
Hacker https://www.hacker-motor-shop.com/Br...=37100006&p=34

Any suggestion or cheaper alternative ?
We would need to know more about your intentions and needs to be able to help.

Many thanks

...

Although no jet drive, this episode from a whole series might be very interesting for you to watch:

DIY Electric Hydrofoil Part 12 - Test Ride #2 Success (5 min 31 sec)

Mind you a hydrofoil has a lot less hydrodynamic drag than a surface skimming surface!
So you will need a lot more power.