RC JETBOAT BUILD - WAYYY better than a NQD (PROPLESSRC) 

Thing with jet drives, theres only so much power the pump can take before cavitation starts. So more power doesn't always mean more better, kinda have to find the sweet spot when performance stops its peak and starts to decrease. Also weight distribution is key, try moving the battery around, forward backward to stop the porpoising, but too much weight too far forward will make it unstable. Its a Balancing act! Cheers

Add a scoop in the intake grate, also you might not have enough weight in the boat. Run two of the same batteries in parallel one on each side same voltage but double the capacity that will keep it from porpoising. How do you not scoop will definitely help as well. Made a big difference on my jet ski.

Need the intake lower in the water but you have to find the hulls sweet spot to be able to have the hull plain up on the water properly and still be able to keep the intake under water at the same time.Just watch out for gators LOL

cavitation is the word you were looking for ;)

Like all boats in scale the hulls seem more bouyant, I've got a 36" flat bottom with dual Graupner drives, I use a small set of kitchen scales(2) to balance the boat, had to use a couple grams of self adhesive wheel weights to achieve a great running balance. To much battery power doesn't work on boats, back of the voltage to stop cavitation

I was looking at vids about the Pro Boat Jetstream. You guys got there 4 years ahead.

try moving your battery back and fourth to see how it would plane out a little better. looked to me like it needed a little weight up towards front.

I know this is an old video, but being a New Zealander I know a few things about jet boats, the air in the impeller is from it being revved to high causing small air pockets behind the impeller blade, once these get big enough the pump loses its prime and can damage the prop. This phenomenon can cause race boats jet drive units to damage the impeller from heavy oxidation and warping. the solution, bigger jet unit and lower rpm.

Each jet drive is has an operating range for RPM. If you exceed the RPM of the jetdrive it will cavitate and the drive will lose thrust. For Brushless motors on LiPo's, generally the formula = No. of cells x voltage per cell x Motor kV rating. In your Yellow NDQ vid it looked like you were using a 2040SL motor. If so it's a 4800kV brushless motor running on 3S LiPo's...So that would give you an approximate RPM of... 3 cells x 3.7V per cell x 4800kV = 53,280 RPM. There's very little chance that jet drive can handle that. in comparison, a KMB 28mm jet drive has an operating RPM range of 15,000-20,000 RPM. Ideally you would pair your motor and battery to match the RPM rating of your jet drive...or just stay well away from wot when operating.

Awesome build

Runs and looks good....lil more weight in front....

Looks like Shelby, the SwampMans boat👍. Good luck getting the ride tuned in

I am going to build a boat from scratch and do not know where to get the best parts if they are not already attached to a boat. I am going to build a wooden boat that will be about 3 feet long. I do not need a very fast motor but I need the motor before I start building the boat. What is a good web site for buying parts and not boats that are ready out of the box?

If you want a nice jet boat get a thrasher v2 its all waterproof electronics has an auto bilge pump using 2 or 4 axis to activate the pump and the v2 is all upgraded hull ti handle any water pretty much Overall awsome boat and really stable

Whatt. I am from South Africa. Much love my dude

Super cool,looks like a blast! might have to get me a winter boat project..nice job👍👍👍

I ride freeride jet skis. And we usually add an extended ride plate. Or maybe some trim tabs? Little weight in front i dig it i want to build one!

Yeah so i would put the weight just under the baxk of the wheel house maybe a pound and for the propeller the pitch is key for the less cavitation its about thrust of course i work as a commerical fisherman that drives a skiff and the differents in how many blades it jas along with the pitch play around with the pitch and see if you can get the keel of the boat a little deeper in the water and maybe a nosel on the output of the jet

1:01 this boat looks great!

Looks like CG is too far back, I'd play with the battery position. I run large scale gas boats and never had the best of luck with auto bailers, seem to always leak.

No link for boat? Why wouldn't you include that?

If you want to improve the handling of your boat in the video, it looks like it needs the weight shift a little forward. This should get the nose down and stop the porpoising. When the bow bounces up and down, that is probably what is letting air under your hull and into the pump.

Hey bro I'm now starting up wit the rc world I'm building my own boat but I have no electronic what your advice

Try putting the battery in the front so it stops bobbing while driving

An intake grate that scoops and directs the water to the top of your impeller should help.

Looks like a good hull. I have had NQD's and i have a RiverJet,

Hull looks sick! Nice build and nice video. 👍

I love the aluminum boat look

How big of a ride plate does it have? Could put a droop snoot on it.

Is there a self rightning system ? Or will you loose it, at the first river capsize ? Thanks

Have you tried a Streamline RC Thrasher? I have one, and they are ridiculously good. Very durable, quick, and handle really well.

Great video i love jet boats allot of shallow creeks around where i live jet boats have saved me so many prop s sick boat👍👍💣🚤

cavitation is the propeller creating a low pressure pocket to the point of the water boiling

take look at the thrasher v3 those are not cheap but they are the best rc jet boats on the market

Awesome freakin video as always. Your videos is why I have started messing with RCs again.

Really love the channel man it's always a good idea to watercool boats as they are under much more load than cars and usually have sealed hulls but at least your not doing what i seen on the creative channel and using flexible pvc tube hot glued to the motor haha would love to see more boat content. And just make sure that no cooling lines are kinked and periodically check that water is coming out

South Africa 🇿🇦 represent

I have a jet boat and it's got a custom ride plate over the intake that helps suck in water and prevents the pump from sucking air in

Great boat! Great video! Made me laugh too (not your fault eh) when the caption said, "to keep the pumper from sucking hair," which is theoretically possible if people regularly use the pond to bathe and shampoo. LOL. 👍👍 Liked and subbed.

This boat is sweet! Is there a link to purchase this boat?

I wonder if you’re experiencing cavitation? Is there any way to lift the leading edge of the intake? I’m thinking something like a NACA duct.

I reckon the battery up a bit further will get it to plane nice. And will you stop giving me ideas please. My missis is already giving me shit about how much junk I have lying around 🤣👍😂

how about buy a big (chinees) 3D printer print your own hull :-)

Nice stuff bro although you can get the Proboat Jet boat or the Thrasher aswell.

This is pretty damn aight I might make my own Custom RC as well. Taking the time to make it though

This is sick as fuck!!!! Imagine if you had like 5 of these, one of those courses built, and 5 of your buddies to smash them for an afternoon! I would love to see that, or at least a follow up video after you added some weight. Maybe think about adding like 3 ounces of fishing weights to the nose and like 1.5 ounces to the back, in hopes to sink the boat more in the water. You might be able get more propulsion that way, no except here just my two sense!!

Weight towards the front and an intake grate.

seems like from what you have said about the air, that the boat needs to sit lower in the water

wow, a nice boat...small but fast runner

Just found your channel but very groovy video! It's always wicked to see what other Builders are up to.

Move the battery to the front of the boat it’s got a lot of weight in the back so you wanna even the boat out

The music is fucking intense! So intense!

Your content is well produced, did you take any "special" classes.

Have a look at the thrasher jet boats man. I have one they're a blast!

Love that little jet boat. It looks so cool as it goes. as far as the best set up I can't help but I will subscribe to your channel to see how it goes for you. From your new pal Helcat in Australia

You ought to check out the thrasher jet boat that rcsparks reviewed.

is this filmed on the credit river?

You need to adjust your trim tabs at the rear of the boat. 🛥

You should do a fan boat.

0:22 👍👍👍

I build some pretty serious jet-boats….. wanna take a look

What about the thrasher?

were did you get the motor and hardware for this and do you happen to have the link to get the boat too

Were u git this boat

Oh this boat is lit dude! I love this little bullet ;p here is ur 19th like ;) cannot wait to see more of ur sick👌🔥 vids

What was the jet boat that rcsparks had that thing was cool

It is a jet boat, in real life these don't suck air, the model would be like stuffing 5,000 hp in a 20' jet boat. So it will cavitate when it bounces and gets gets air. So don't think this boat will be able to run flat out unless it is glass calm, but then again the whole idea of a jet is to be able to run shallow. Some real jet boats even can skip over shallows, snow, logs in the stream.

being a newb,whats a auto bailer?

Who would dislike this video ?? lol 😂 sweet vidz bro 👌👌👌

Whoooop Whoooop awesome seeing something from south africa on your channel, max love from cape Town south africa I love your scale as shit channel Kpop don't stop

Have a look at rcjetboataustralia.

nice work my man

Should have made the tube going straight out the top of the back make it look like a Yamaha

There is a rc jet boat in Delaware for sell

Wonderful boat, sell it to me! I have no ergonomic possibility to build my self😀

I bought one of these I cant wait to get it

Biggest things I see are the out on the jet should be under the water line a bit while running I think a hair foward on the weight but making an outlet for it that gets the water under that line and some anti porpusing fins and your all good should rip. Don't know anything about rc boats just real ones

Channel deserve more subz.👍

Love your videos kpoprc you really should upload more

anyone know what motor he used

i need dis boat en mai lyf

I remember 7 years ago when i got the tear into boat it was only $28 each on hobbytron i got 2 of them still. Lol

Awesome project,

BADASSSSSS!!! As always Kpop!!!

New to the channel Eurobeat rc?

Yes, you can over rev a jet pump. Once it starts to cavitate, rpm will skyrocket and you'll lose speed. One of the best jet pumps currently on the market is actually made by hobby king. hobbyking.com/en_us/40mm-jetpump.html?___store=en_us

Only 14 likes..... But........but.....it's 15 now

Build video?

Needs a wheelie bar🐴

Hey man, that's sick !!!

c'mon 100k! i still have to finish my nqd build.

No problem its just an idea

I live in South Africa

How u get the hull

keep the weight in the ass, but also keep the COG low! take it from some one who has made their own 3m jet boat powerd by a 700cc jetski engine! too much weight in the front no good also you dont want the dead rise to be too sharp!

Sooo intense.

SIIIIICK!!!!!! 👍🏿👍🏿👍🏿

You talk funny

Check out rcjetboat australia.com.au they also make some pretty mad looking hulls.

If its only on facebook they can keep it