Jet Boat AMPHIBIAN Water Test! 

This is great. I need something like this. Love the NZ comedy.

Ive been waiting for what feels like forever for another video

another banger video dk,keep them coming.. love the kiwi ingenuity!

Far out . Thats such a cool idea . Keep pumpin out the content

Bloody legend mate! Keep up the great work. Love your ingenuity!

Puttin on the ritz! Have not heard that song in so long!!!

you are beyond talented in even your edits and humor, much love from saint pete Florida, your distant NZ cousins

Dude!…you are a freaking guardian of the world of ingenuity!…no holds barred with you!..love this channel!

definitely successful mate more mods will see it flying great job hope ya well bro cheers

Great stuff Daniel... it is slowly coming together with all the mods and issues that come up. I am sure you will work them all out and this will end up being great fun.

Absolute insanity. I freaking love it.

Awesome video mate!

Great build! Ty.

Seeing this thing finally get up on plane is awesome, definitely coming together!

Nothing stops you my boy 🔥

Mad max boat all hand made love it !!!

Nice. Look forward to next video.

You might want to look at your wear ring for the jet pump because if it is constantly spinning and not in the water it will wear down and instead of pushing water backwards it would just spin it in circles inside the pump

Awesome work

I like this skilled kind of “sketchy” Best of both worlds.

That throttle peddle is actually genius if it hold us. Well done

Bro I love ya builds aye

Nice test mate. I think it's your rear wheels dragging in the water. A skid/deflector plate just before them might solve some issues of the dragging. Thank you for sharing your crazy inventions. I love it.

Sounds like my ski when the pump shoe failed. Cavitation like crazy. Well done!!

Your feathered assistant just walked off without giving any assistance or suggestions on the brake problem😂. Does this boat have a name?Might I suggest "I'll fix that... later" I love every single part /sub assembly of this build. There is nothing extra, just what it takes to do the job. A plate at the rear of the boat aligned with the bottom of the hull. (Think mounted like trim tabs). It would be to keep the water off of the wheels and running gear. That could eliminate a lot of drag as the speed on the water increases.

Nice. Great job.

What a perfect place to test it out

Dude this thing is starting to look so sick!!!! super excited to see it get up on the plane... I just watched a video about this its called "jet boat impeller math by idaho viking" that might be worth a look... from what i understood one thing to be careful of is that the hp requirement as you increase RPM is a cubic function... if you double your RPM it will take 8x the grunt, if you triple RPM it will 27x the hp required... so just because it feels like your miles off getting full use out of your power i wouldn't goto like 10x gear reduction right off the bat.

Awesome video dk. You might want to replace the wear ring on the jet unit. would certainly help.

So excited about this. Been working long shifts so I gotta sleep. Still gotta comment since I can't patreon

you should try whippers motor with window switches to move the rear axle, pretty powerful and reliable, keep up , nice work

Daniel, what a great design idea for the area that you live. (Shallow water for a long way out etc. I don't know about the Cavitation or speed of impeller but I know that if you choose a different/lighter front wheel concept it will get on the plane better...

Sick build

Good to see some you🤙

Here's the gear chart ratio for _a_ CBR600 (not sure it is this specific one you got, but it's a start): 1st gear -- 2.750 (33/12) 2nd gear -- 2.000 (32/16) 3rd gear -- 1.667 (30/18) 4th gear -- 1.444 (26/18) 5th gear -- 1.304 (30/23) 6th gear -- 1.208 (29/24) And if my math is correct, at 11k RPM the output goes at about 9100, plenty for an impeller. So i doubt RPM is the issue. While it's hard to tell on video, it looks like there is a massive gap between the housing and the impeller. That is generally bad since it prevents the impeller from pumping water efficiently. Usually there is a plastic ring in there that closes that gap to just over "self-clearance". So I _think_ that's where your lack of power on water is coming from.

AirPod Pros (2nd Gen), make a WORLD of a difference. Good work!!

Your channel is awesome! Please build a geet reactor or thunder storm generator next.

I was inspired. I was thinking about this video title all day. Only watched the video now that I'm off work. That being said I was curious how I would go about building something like this. A single motor doing both jobs is always a tough build to design. For upgrading, mind you still won't be winning any races. A larger diameter jet drive would push more water. There is an upper limit to the rpm you can spin it to. Another thing would be to reduce drag. Those tires are like parachutes in the water, even lifted. Changing the gear ratio in the rear axle would help land speed. Gearing up the motor to drive shaft would help both land and water but would put extra stress on the motor. Great job overall

I was so excited to see this video posted. I think you should make the large gear going to the rear diff smaller with a different weld on gocart style hub and sprocket. Then the land speed would be solved. Also the jet ski the pump came off of probably has a similar rpm to the engine your using. I think the speed and 1 to 1 gear of the engine to pump is perfect. Your issue is either a worn out wear ring on the pump or something else causing cavitation. This thing will get going pretty damn good on land or sea once you make those changes. Also an old golf cart tire could help with front end stability because it so flat and wide. Good luck I love all your videos man. 👍

That worked relly well i think.. mabe you could try a Linear Actuator for the front wheel lift as they come in all lengths and torques, the ones im using for my ebike camper have around 40kg of push and pull and you can get stronger ones..plus they have auto cut off at full extension and full retract..im using them for the camper slides and they work well.

Can also try a smaller nozzle on the jet unit. It would utilize the horse power and cause a higher nozzle speed.

Great video. I would suggest linear actuators to lift the wheels, they are cheap from Ali, and you can get virtually any power level from 50kg to over a ton, even at 12V and they have automatic end stops. I just ordered some IP66 sealed versions that do 500kg at 5mm/s for a project. Cheers, and keep it up, it's an interesting project.

Bloody awesome I love it! My jet seems to work best in 5th gear which is obviously an overdrive ratio in the car gearbox, not sure if that's the same with a bike gearbox? Diameter of the pump itself might be a bit small aswell... Bloody good effort though! You should be well happy with that! Makes me want to build another one with retractable wheels 😂

How you produce such excellent quality content so quickly is beyond me. We could build some wild stuff together but I could learn a lot from you I think.

A simple suggestion. The hose under your pedal should be moved. Every time you floor it it rubs against that hose. Over time it will fail.

Yay back to playing with water projects. Speaking of water projects any updates on the electric boat coming soon?

Chur! Love your vids bro!

If your geared 1:1 in top gear, then you have more than enough rpms for the jet pump. Most jetskis operate 6-8k rpm. You need a more aggressive impeller, and/or a bigger pump. If you spin it faster, you'll likely just cavitate. Also, running a jet pump in shallow water like that, sucking up sand and rocks and crabs, is a very effective way to wear out the pump sleeve and impeller. Creating more slippage, cavitation, frustration, etc. Also the Marine Life doesn't appreciate it. Just saying. Also, kick ass project! Keep it up!

Remember Mike Finnegan a while back talking about tuning his drag racing jet pumps. The cavitation could just need a tuned edge cutting more water into the intake, type thing. Or plugging that bung wouldn't have caused too much pressure in that section? Like if the pump is only meant to pump out that hole and not be blocked off? Just a thought. But yea, Finnegan talks about shaping his intake a bit here. There's another where he adjusts the height of his knife scoop but it's in the middle of a random build vid somewhere. Cheers: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-elrXCKV3U9Q.html

This is cool as!

The impeller to pump housing clearance is probably way too big causing cavitation. If the pump is cavitating, you won’t get any thrust

At least you got it up on step with a bit of hydraulic in the shallows :) Looks heavy, but if you can get the pitch on that impeller matched to RPM/HP it should stay on step

Ensure a tight tolerance between the impeller and housing. You’ll lose a ton of pressure and also the gap will create cavitation along the leading edges.

Awesome 🙂

The whole time I was watching this, all I could think about was, "The Red and Green Show"if you don't know what that is, look it up 😂

Greetings NZ from USA. I'll be showing this to my dad. 👍 I'll leave one recommendation. Gator Glide or a similar hydrophobic hull coating.

This would be great here in Oregon at the coast where you could drive right down the beach into the ocean with this and go drop some crab traps and fish while they fill up. It's legal to drive on most of the beaches here and and I think this doesn't count as a car so I would just go anywhere with it that people can walk and this can fit. Very convenient, very cool.

Definitely look at the carbon seal on the pump input first

Air boat build would be 😎

Cool. 👍👍

Runs on an impeller but I like the Impaler on the forward passenger compartment.

11000 rpm going in to a jet drive doesn't sound right. should be about half that, tops. your impeller pitch might be too course, not too fine.

That's really shaping up into a usable vehicle. Can you use a rotating flexi cable drive to raise the front and rear suspensions at the same time? Or linear actuators?

You could use a timing gear set or timing gear and chain from a pushrod engine. That will double the speed plus be plenty strong.

Even in top gear the output would be doing less than half engine rpm due to the primary drive gears. The original ski would have had the impeller running at engine rpm, so you need to gear it up. Also the impeller looked pretty rooted in that glimpse we had of it, that wouldn't be helping. Great to see it on the move though!

I feel like its Cavitation, cause when you got it going in the shallows it was moving at a decent speed at reasonable revs, and all of the other jetboat builds Ive watched recently are direct drive, also my own jetski is direct drive. They all seem to move just fine at around 5k.

Great kiwi number 8 wire engineering

Larger impeller should make better use of the bikes powerband, and it'll keep you further from cavitation territory.

Think the underwater breaks would rust less if they were discs not drum, given the water can drain

You should put a hump in front of the jet and intake to help with flow

That is so badass a vehicle that you really can get away fast from the world 👍 if you perfected the exhaust to be less loud 🤯

Farrr you giving me bad ideas bro 😂

I wonder if it's the shape of the pump inlet chamber that's limiting pressure build up? Did you base your design on the one the impeller came out of? I know the grate can make a difference on a normal jetski, so it could be a factor here too...

The main issue I see of that the jet nozzle exit is mostly below the water level, it needs to be above in order to get max thrust from the jet unit, of its below the water it is pushing against the water instead of the impulse it should be when above the water level

One way to confirm the current drive ratio might be to take out the spark plugs and put something down one spark plug hole to show the rotations so you can count them. Then, in top gear, rotate the output shalf one whole turn.

You don't think the big tires are keeping you from planning

the impeller could be worn out esp after pumping all that mud. id start there and if still an issue think about diffrent gear ratio. also get the helm opposite the engine. too much weight on one side. you can mount your front wheel on a power outboard bracket.

Masterful.....

The back of it looks amazing. The front... with that dinky wheel like that is.. mech.. a necessary I understand.. I wonder how it would look with pointy boat nose and two bike wheels on the sides... or maybe.. how about cutting in to the front of the boat a bit and having that wheel more nested inside of the hull. There is something great in that look. Massive nested wheels at the back and strait clean boat nose at the front. And bike wheel somehow spoils it. imho

Great job

Check your clearance on your impeller closer the better.

Cheak the wear ring around the impeller in the jetpump the lesser the clearance between the 2 the better it'll perform

is the jet unit always in operation?? i recall being told not to run a jet pump dry as without water lubricating the seals it will flog them out in seconds resulting in poor jet performance

wyrm gear on both ends for cranking up front and rear wheels

Check your wear ring. if its bad your pump wont build any thrust.

I am looking for a new project… This is a real……labor off free love 😂👍✌️

A Non-racing 2stroke outboard runs at like 6000rpm, and the propeller at half that. Im not a 100 on impeller, but should t be too far off. A gear on the output shaft might not be a bad idea👌

You've gotta Metal lathe but you don't have a nerlling attachment You need to get 1 instead of welding on there you could have nerve that and bring it up so the bearing fit tight

Changing nozzle size on pump will affect torque on jetdrive

John here from dunedin I have pto over drive unit you can have I'll send it to u if u want its 50% over drive smal alloy rattled for 120hp

Jet boat/car/bike/trike.. thingy 😁👍

I can't think of a single thing that could go wrong.

I know where that is, freedom camped there in the summer

Mate u weld like ur using hot glue. I’m envious.

Seems like the carbon seal for the jet pump has failed causing water to spray inside the boat and when the carbon seal leaks the impeller will suck up air and cavitate.

you know the solution to water let in holes, Just drill a couple water let out holes.

I think having 2 motors is better . Small lawnmower motor for drive on land and jetski small motor for water with watercooling. I think seadoo 650-717 motor or yamaha 701 motor ,or kawasaki 750 motor will do the job. The bike motor is not good. Not for drive, not for jetpump.

11k..yikes. veyr clever build. I would guess cavitation to the weight. that jet drive came from something tiny.

It looks like the back wheel is in the way of jet trying to plane the boat.

An ideal boat to evade bay constables, coastal police, harbor patrols, marine/maritime police/patrol, nautical patrols, port police, or river police.