Custom Nozzle Test, & 6s Speed Proboat Jetstream Hits 27mph

[@georgegonzalez9281]

I got my Jetstream yesterday. I ran it in my pool just for a test and I was impressed at how maneuverable it is. Had no problems running it fast in the confined area. I was amazed that the boat actually goes in reverse without using the reverse bucket. None of the other jet boats I've owned was able to do that. The designers left the reverse function to clear debris that get stuck around the impeller, but it does indeed go in reverse making the bucket unnecessary. I was studying the transom last night and I thought I may actually remove the trim tabs altogether and make a custom plate under the nozzle that's longer to act as a ride plate similar to the Streamline Thrasher. I also have a Flycolor 150 that I'm going to install just for the heck of it. Sundogs makes 3D printed nozzles for the Jet Jam and River Jet that really do increase speed, so it's only a mater of time before we see options for the Jetstream. Fun video, thanks.

[@IRONCLADRC]

I've been talking with Scott at streamline rc. The thrasher may be coming to the channel here shortly. He's been refining the thrasher for years, and I'm super excited to be working with him.. I'm working on a few temporary nozzles for the jetstream, I designed them to be quickly interchangeable, going for a test right now. Hopefully, the video will be out tomorrow

[@Dr_Jet]

Ohhhhh..... If you get hooked-up with Streamline, WATCH OUT FOLKS!!! I can see it now: Big B skulking in the bushes waiting for an unsuspecting 'gator to cruise by and WAHMMO! Hey watch this!! Poor 'gator won't have a chance, but he'll make a great ski-jump.... 🤣@@IRONCLADRC

[@playanddisplay3636]

Jet boats are all about action reaction. Water doesn't compress like air does so a smaller nozzle will always be a decrease in water flow. The amount of water volume/weight is what moves the boat.

[@Mrkcnnt]

Because water can't compress, it has to flow faster you know. It is all about exit velocity

[@playanddisplay3636]

@@Mrkcnnt Exit Volume also, the volume is the torque the velocity is the HP.

[@nealstarling5422]

Can’t get enough of this type of video Big B. From what I understand of jet boats, the intake inner housing, before the impeller, can be a place for improvement. However ProBoat probably has it down pat . So It needs to be full of water at all times providing a little more water than the impeller can move. Although too much extra space can cause cavitation, too much air mixture creates less dense water to be pushed out the back. So I have no clue as to what that rc boats intake cavity looks like but I imagine a near straight pipe would be desirable like the “through hull” water pickups. I saw a video of a full scale jet pump inner housing having a plate welded to the forward most portion to close of unneeded space, the drive shaft passed through it and this allowed for a more stream line intake and had a noticeable improvement on the boats high end speed. 🤷🏻 what do I know, accept that out of the box is never fast enough 🤣😂🤣 Tinker tune and test 👍 BGFL

[@jjjjrrr678]

This thing is a blast in the sea on shore waves 😄

[@nealstarling5422]

Don’t give up on the nozzle, with water jets very slight improvements can be made but slight at best (that is what I’ve gleaned from the internet) however Big B you may prove them wrong!!! Tinker tune and test 👍 BGFL. That is one cool boat.

[@IRONCLADRC]

I have no idea what I'm doing with a jet boat! Lol.

[@RCplamodel]

Great video! 👍Perfect camera work, a very nice RC Ship, Waves and a great location! 👏 🙏👏

[@ralphhondaman]

I got mine out today. Made some small videos of it. No trimming done really. Just wanted to test it. It did 29 mph which wasn't bad. And there's definitely a few more left on the table.

[@ninthislandrc]

I think I might know the 'problem'. You placed your jet nozzle extension inside, which is restricting flow, creating a slight back-pressure, while simultaneously increasing the jet stream pressure, but also condensing that stream into a smaller stream. There are a few (maybe more) videos about the TFL Jet Boat, and nozzle mods people have done. You might want to search some of them out, and watch them. You'll notice that, in almost all extensions done by others, they've either added the extension to the outside of the stock nozzle, or (as I'm in the process of doing) they've added the extension directly to the end of the stock nozzle (which, when done correctly, has an ID matching, as closely as possible, the stock nozzle ID).

[@IRONCLADRC]

Roger that, I'll check the tfl jet pump nozzle mods out. Thanks for the suggestion

[@ninthislandrc]

@@IRONCLADRC Want referring to using the TFL nozzle on the ProBoat. Was referring to looking to see how others modded the TFL nozzle on the TFL Jet Boat, and user that info to better help you mod the ProBoat's nozzle.

[@scottdearmond5532]

@@IRONCLADRCThank goodness I’m a lifelong machinist and was already thinking 🤔 about making a ring that will press into the steering nozzle but has a smaller diameter to match the pump outlet diameter.

[@jwoodshed1108]

If you have dimensions of the nozzle and me with those two side studs. I can design and print a few tips for you to test.

[@ninthislandrc]

@@scottdearmond5532 Now you're talkin' 👍🏼👍🏼 🤙🏼 For my TFL Jet Boat, what I'm going to be using is 'interesting'...but, strangely enough, it matched the nozzle's ID & OD almost perfectly - a plastic tool for installing/removing a toilet seat...lol. Granted, I had to use a Dremel to remove the 'nubs' on the inside, but it works. Then, I used epoxy to fuse the two pieces together. To remedy the slight difference in ID & OD (0.1mm inside, 0.2mm outside), I used a Q-Tip to apply a minor amount of epoxy, "smoothing out" the difference. I haven't had the chance to test it at the lake, But I hope to do that this coming week, or the following week.

[@michaeljames6203]

Awesome, Go into your Ungrades for Speed and More Champ

[@dub2536]

Very impressive video. New Subscriber. Happy trails! o7

[@IRONCLADRC]

Thanks and welcome to the boat gang BG4L

[@ralphhondaman]

The steering nozzle isnt what id change in diameter. The part of the pump behind that is what would need adjusted. Thats what the water pushes through. And its pretty thin there so i feel that part would need 3d printed and made different sizes. Im picking a printer up this winter.

[@boatwerks]

Big B look into loader grate for jet pump. Little piece of metal in the intake grate on the bottom that directs water towards the impeller. It will load more water to the impeller

[@IRONCLADRC]

Will do thank you for the tip

[@TheZX11]

There is an optional $16 plastic grate, with a curved scoop in it, on the Horizon site. Not sure what it is for. There is also an $34 aluminum grate. It is the same as the stock one but in aluminum.

[@RogallaMarineRC]

More kv would be easiest way to go faster. Cool stuff big B

[@paddlesworthrcpark8215]

Think it might be better if you make the hole bigger than stock so higher flow rate

[@brandoncocola1322]

How about using the trim tabs to keep it from purposing and trim the nozzle up. It might be worth a try. Also is there anything you can port off of the inside of the jet pump for better flow.

[@IRONCLADRC]

That's what I used to do, it's actually quicker with the trim tabs up nozzle angled down.

[@LandynUnger]

Bro how much is the life size one or is the life size one not for sale

[@drewbell9438]

Hey I'm looking to do a 6s upgrade on my Jetstream - Having a look at one of those Flycolor 150Amp esc's to do it. I see you run them in a few other boats and so I was curious if you thought it would be a good upgrade for a Jetstream? 3s is a bit of a snooze - 4s is o.k. - but I got some 6s basher batteries from an Arrma I'd love to get in this thing! ;)

[@IRONCLADRC]

Yea, I like the flycolor esc's, should be a great upgrade

[@drewbell9438]

@@IRONCLADRC Thansk for the quick response. I see those OSE Raider 150's too come with all the upgrades installed.... might just snag a pair of those and call it good!

[@douglosier1208]

Try opening up the inlet for the water to have more volume displacement

[@Dr_Jet]

That's what I have done on my jet pumps. Like porting and polishing a cylinder head in a gas engine.

[@crashalexander7232]

and then restrict it on the exit ...this is how we do it in full scale jet pumps....also getting the wear ring and impeller tight as possible and the list is goes on....secret stuff....lol make a stainless impeller or maybe someone did already....lot of stuff to tinker with.

[@stevejackson3564]

I would lengthen your adapter but keep the hole the same size & wrap your adapter around your nozel ..

[@TheZX11]

What is the difference between adjusting the trim tabs and adjusting the nozzle up and down? Both do the same thing?

[@CPRC23]

With the combination, you can get the boat out of the water with the tabs for more speed/efficiency, then trim the bow down for stability

[@hotboyracing]

You should use a flysky gt5 and hook the trim up to channel 5 or 6 so you can adjust the trim on the fly

[@HolyCannolis]

Maybe time to rename Blake as Jesse James Big B?! Perhaps fashion him a little western hat? Always appreciate your will to experiment and get those big numbers. 👏

[@Dr_Jet]

Whacky is good. Invent things and make stuff……. 👍

[@IRONCLADRC]

That's what it's all about. Tinker test and tear stuff up.

[@braskathroughthegames698]

dude i'm excited for the spinning pressure washer nozzle lol

[@Kolsch221]

Question is…. What’s better this jet boat or the Thrasher?

[@IRONCLADRC]

Couldn't tell you. Unfortunately

[@SteveNavarro-qc3vl]

Can you mod this thing for 8s??

[@Motorboatinsongun]

Nozzle Schmalsle she’s wants a more aggressive impeller and a loading intake grate .good luck

[@Mrkcnnt]

what is the diameter of the impeller?

[@IRONCLADRC]

If I'm not mistaken it's 33mm

[@ralphhondaman]

I feel any nozzle you add will slow it down. Anything you insert into the outlet is a restriction.

[@IRONCLADRC]

Now we all know. Thanks for watching. BG4L

[@ralphhondaman]

@IRONCLADRC I bet people will 3D print some things. I thought about it but then I have to remember. I didn't buy it to be a speed boat.

[@cousineddie7444]

Physics: It's not just a good idea, it's the Law. Bernoulli, Boyle, Pascal... they'd all have some opinions on this matter.

[@IRONCLADRC]

I'm sure this bermuli Boyle and pascal didn't come up with the laws of physics in one day on their first attempt. I'm sure there was many failures and attempts to get the outcome they were looking for.

[@cousineddie7444]

@@IRONCLADRC You're 100% correct. All Physics is derived from the total collection of failed scientific experiments. I apologize if that comment came off as critical, I was just trying to point you in the right direction w/o doing a full blow science lesson on KZbin. Keep doing you man, seems to be working for you so far.

[@jjjjrrr678]

Can someone put some foam on the roof of this thing to see if it self rights?

[@IRONCLADRC]

Check mad lizards channel on KZbin

[@hoodatdare7039]

FASTEST JET BOAT I HAVE EVER SEEN . I THINK IF YOU REMOVE THE TRIM PADS THEN MORE EXPELED JET WATER WILL BE DIRECTLY HITTING THE POND WATER .NO - + BATTEL. YOU HAVE GATORS WE HAVE MUSKIE. 5 FOOT MUSKIE JUST GRABED A GIRL BY THE LEG RIPPED HER OPEN BAD. THE TEETH ARE LIKE RAZORS. NOT AS BAD AS A GATOR BUT THEY FEED ON WATER BIRDS. DUCKS AND GEES. AND RC BOATS.

[@IRONCLADRC]

I did not know musky we're aggressive to the extent of attacking swimmers. Jeez that's wild 😳

[@freerangehuman1976]

Already took off the reverse mechanism.

[@IRONCLADRC]

Yes sir, it has reverse with out the bucket. I don't use reverse on any of my boats I usually program reverse out the speed control