Mini Jet Boat To Inboard Surface Drive , Test!
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- čas přidán 6. 09. 2024
- The mini jet boat to surface drive is completed and taken for its first test on a river which is flowing pretty fast the little Honda clone 212cc engine does a great job fighting the rapids.
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This is awesome. Your daughter will always remember flying down the river with her crazy dad in his home made boats
She will probably always remember that it is ok to try and fail and everything doesnt need to be like others do.
Thanks Bruce! She did a great job and I will never forget either
reminds me of the crazy things me and my dad used to do, makes me smile to see that there are still some parents out there who aren't afraid to bring their kids on cool outdoor adventures :)
She enjoyed it , but it is scary taking the kids
You, sir, are an engineering genius. You are also a wonderful father. Memories for life.
Thank you❤️
If you haven't found a solution to the exhaust sucking up water, I would suggest putting a pin hole in the pipe close to the engine. That way when the exhaust cools, it can pull air from the boat instead of pulling water in.
I've only watched two of your videos now and I like what you do. It's great that you get your daughter involved. Memories like those last a lifetime.
Thanks ! I tried the exhaust a different way in the next video, I think a pin hole in exhaust would work too . I have another plan for that boat coming up that will be cool if it works
Great job. Your the fanfiction guru. Your daughter is a fearless pro boat captain great job on the steering. Thanks your vids Are way better than TV
Haha thanks , she did really well maybe she should be driving!
@@DktheWelder yea she a champion he looked like it was moving along faster than the other set ups ?? Yes ? No ? Love your boat man. I swear your a building guru
@@2strokecarbtuningportingin187 it was moving faster and had more in it . With a new motor and different prop it will be fast but need to get it to turn haha
@@DktheWelder czcams.com/video/jWD-IxjdFrs/video.html
I am touched by the fellowship with you and your daughter. Keep that up. Don't lose her.
Thanks 👍
You've done it again my bro🤜🤛 awesome vid great work on the boat, big props to your daughter for her excellent steering job💪 and camera skills. Mia's one smart cookie with her engine diagnosis😎 I don't know many kids even adults with that sort of mechanical knowledge and understanding.
I was blown away by how good she was ! Thanks for the comment 👍
Its so nice to see parents spending time with their children ! A lot of parents don't have time to spend with their children cause they gotta work 24/7 ! and some simply don't spent time with them ! Your a great Dad !
Thanks. It is hard with working and everything but important and fun
The tunnel you added is acting as a water feeding tunnel. The majority of the shallow water boats here in Texas have them. Basically allows you to project a Stream of water up above the water line. Letting you run your motor higher out of the water.
Some small scooter boats here in Texas even have the outboard mounted above the bottom of the hull. They’ll run in extremely shallow water. Mine will float in 4 inches and run in less than 3 inches.
I have seen the Americans with tunnel hulls in Jon boats doing well so though I would try it with a surface drive as well. I would like to try a tunnel hull in a bigger boat with an outboard
That one goes sick, mate. Faster than your jet drive, and the propeller is protected too. I like it.
Bravo , she works great , Making memories with your daughter ( the Captain ) priceless :-)
Thanks it was a great day with my daughter
Tiny hole drilled in the exhaust (up high) will break the vacuum that draws water into the engine. Bigger rudder needed. Great fun! Great Dad.
Thanks ! That was what it needed !
absolutely, without a doubt, this is a win. what you built with your daughter is priceless. The boat is pretty cool too. A+ Dad right here.
Cool kid! My kids would cry and scream across the entire river. Your daughter will grow up to be a badass that knows and can do a lot of stuff
yes she did a great job! thanks
"Boats n' toes, boats n' toes, gotta get me some boats n' toes!" I creased!
Finally, boats and toes!
@@DktheWelder You should name your boat "Prestige Worldwide"! Love the modular boat design btw.
Love to see y'all having fun, playing in the river/creek together.
I don't know how I stumbled upon your channel, but I'm glad I did. Awesome content.
Thank you ! I enjoy making these videos
Hello Daniel and brave daughter. I too am converting a jet drive to surface drive. Not quite as quickly as it appears you have. Some food for thought: I have a fixed shaft 35-ish hp engine running to a rear CV joint, housed in a modified jet pump nozzle. (For steering and trim) Turning the drive unit is far better than using a rudder, though I will need a more robust push/pull mechanism. Mechanical advantage is currently muscle vs. side forces. I am struggling a little. Easy fix. Trim is a 12v linear actuator/relay module/switch. The actuator controls the output shaft housing up/down. The idea here is starting in air, (no clutch) then lowering the prop to initial drive depth, then trim up to around 50/50. This system requires a rear transom clearance, like offshore race boats, to allow for a 12-17 degree shaft angle to get a proper high speed plane. My plan is to go from ~35 mph to 60 or more. (56kph to 97)
To address your rudder issue... the way you have your rudder setup now as the rudder turns side to side the rudder blade moves out of the propeller wash there for removing it's effectiveness.
One solution more the vertical axis of the rudder back just behind the propeller with no lead so you keep the rudder's leading edge about center of the propeller shaft.
As for size 4 to 5 inches fore and aft as for height, deep enough to be in 3/4 of of the propeller dim when the drive is down in the normal running range. You need to add a spring or the like to keep the rudder down in the propeller wash when running for the rudder to work.
Keep in mind that there is more drag on the rudder when you are turning than running straight ahead when you work out the hold down spring system. You only need about 30 degrees swing from centre to each side on the rudder.
I hope this is of help to you.
thanks! I am doing these changes now👍
@@DktheWelder you are more than welcome. I have seen a number of different styles of surface and shared what I saw as a design issue.
You now have me thinking about making a Leavy style surface drive for a skiff I have.
Your exhaust issue is another story... the outlet is to far below the loaded waterline, myself I would run it out the side forward well above the waterline with a tall waterlock loop.
One thing that I have seen used on inboard engine installations is if the exhaust is on the right side of the engine they plumb the the exhaust out the left side of the hull and it's as steet of a slope as the can get.
To protect yourself from the heat use some automotive header wrap for a heat shield.
If you are wondering I use to work as a marine mechanic as well as building boats.
Your daughter did a great job at turning 👌
It reminds me of the time I was on our small boat ( barque in French ) down the current/stream with the wind blowing in the same direction on the river that pass by my backyard
Your channel really received the visibility that it deserved, even the views on your older videos blew out 👏
Thanks, she was great at steering
The first thing I noticed was that the rudder needs to be much bigger, and reach a bit deeper too. The bending rod will definitely not be strong enough for the bigger rudder. I recommend a classic double-pull steel cable, similar to the old boat steering systems from the 1960s. You can still use either a lever or a steering wheel with that configuration. It's much stronger.
It's tricky using an air-cooled motor, as you have no water source to bathe the exhaust and keep it cool. If the motor has a stator and rectifier, you can use that to run a little 12v water pump. Pick up from the river and pump into the exhaust as close to engine as possible, with a check valve. And yes, the exhaust needs to be routed up above the max water line, before going down to exit the hull. Water exhausts are always different depending on how the craft is expect to move and the freeboard, so you'll have to customize it in your own way to keep the water out of the engine. It sounds like a lot. 🤔 Alternatively, I suppose you could wrap the exhaust with heat insulation, but on occasion where the river water rushes back into the pipe, it could crack, since it would be red hot after a long run.
The easiest solution to to let the exhaust blow up into the air, or off to the side, keeping the exhaust pipe as short as possible. It would be louder, but the engine would like it; it would work.
Indeed, boat is difficult. That's why I just bought one instead. 😁
Above all, let me just say that the kick-up drive feature you made, is GENIUS! I love it. I've never seen anything like it, here in America, where we're all supposed to be so bloody smart! 🤣
My vote is move the prop forward under the hull and fix the prop height solid. Move the exhaust out from under the hull where it has to be causing cavitation and just mount a muffler. For the rudder now that the prop has moved forward, make the rudder the same size as the hull tunnel and put two pivot points instead of just the top mount. Best of luck from Canada.
I agree with half of what your saying , I don't like the idea of fixing the prop height because you need it deep too start off then right up getting the surface drive effect once moving faster it has a lot more speed in it once I figure it out . The twin rudders on the edges of the tunnel I like that idea
Your daughter is a real little trooper and done really well with the steering not too much refinement needed for the boat 👍
Thanks she did really well steering
Have a look at the q-spd or Levi surface drives for rudder ideas. With the exhaust, I would make a riser off the engine, up higher than the water level can ever get, then drop back down to where it currently exits, however pick up some water from a pipe through the bottom of the boat and dump it into the exhaust pipe on the way out. If you want a water trap, put it after the water injection point. It’ll keep the noise down more and keep it a bit cooler.
The engine should be fine, used to race Thundercats and flipped it and filled the engine with water heaps of times, get it started again it’ll be all good.
Thanks! Thundercats are cool. I been looking at pictures of wet exhaust and water boxes
Just make a tractor flap for the exhaust tip. Too many bends will mess up the compression increase surface area of rudder that contacts the water. Other than that it's pretty neat 😃
A simple tractor flap might work fine, thanks 👍
On the topic of steering, a standard cable steering would probably work much better than a push/pull rod type.
A cable could also be hidden underneath the top edge to make it less eye-catching.
Just search "Cable steering" on google and you'll find alot of inspiration.
Nice build and keep up the good work.
A simple rope and pulley system could work thanks!
My vote is on pivot thru center of ARea of the rudder, so that it rotates but stays within the thrust zone. As current, it steers at extreme angle such that the rudder leaves the prop area entirely. Clear as mud I'm sure, good luck
I was wondering if that was the problem a lot of good comments coming through
Loved this project and family test run.. Exhaust needs a flap on exit to close when water tries to enter exhaust tip. Similar to reed valve. Rudder needs to be about 120mm deeper to be in current from propeller wash to be effective as static keel for boat turning moment..
Otherwise sweet as mate !
Thanks! I need some sort of reed valve for the jet board I am making at the moment as well
you could use a spring to hold tension while pulling the rutter toward to boat, and it will still allow it to bounce out of the way. that what we using in the swap
I was thinking that, I have tried to find videos of swamp boats with inboards to see how they work
Super quality time with your daughter. ❤
Your daughter is closer to the solution than you thought!
When the exhaust is underwater and the exhaust pipe and motor is cooling off from not running, the vacuum contraction of the air is going to suck water back up, as the outlet is completely submerged.
For the exhaust hose, try a short piece of silicone tubing..good for 400-500F degrees which is probably more than what that's reaching in free air.
Yes that probably is happening, I will try find some silicone hose
The mud/surface drive is Awesome m8t! Well done.
Thanks! Got another video out soon was a cool adventure
For exhaust but non-return valve in it. For rudder try to make from two bars one direct to corner of the boat and one from corner to rudder. Also rudder needs to be littlebit under the boat and longer.
Make a linkage arm , that’s an idea longer rudder seems to be what everyone is saying 👍
Hey bud loving the uploads, have you removed the governer from the motor? you could also put some washers(around 2mm) under ther valve springs to stop valve float once you have done this. Flywheel(cast?) should be all good as long as you dont touch the cam. Flywheel could also do with a tiny bit of advance once youve done this.
I have removed governor and drilled main jet out to 1mm . I might try that cam idea thanks! How do you advance the timing? It has the cast flywheel still
@@DktheWelder look at lawnmower racing sites such as ec carbs, arc racing. Im sure you could knock summit up, just an offset key for flywheel really, generally theres plenty of cubes to play with in these they just need a little coaxing, let em breathe etc.
You could try weld some duration onto the cam, just watch cast flywheels get a little dodgy over around 5k.
It sounds like your daughter is having lots of fun.
Wow that is such a cool little modular boat. And you have an awesome copilot! Need to sort that steering out though then it'll be a brilliant little boat!
I suspect the jet drive issue was a volume problem, maybe if it had been lower it could have performed better. Looking forward to your other jet drive build.
Thanks! I think it was a volume problem too
The exhaust has to be higher than water level then go down at out transom under water. You could use one rudder on either side of where prop water come out, use your pivot but make the rudder leading edge straight down from pivot.
ok I will look into that double rudder idea👍
I forget what brand but there was a surface drive with a semicircular rudder over the prop and down both sides. Arneson?
Nice going well upstream , bit of a bumpy ride , glad you didn't fall out lol
Me too it is winter here and cold!
You may have already resolved the rudder problem, but I think your rudder is positioned too high. Currently, you're mostly steering with aerated prop wash.
And good job at achieving Superdad status! She'll never forget days like this.
Thanks she enjoyed it! I tried making the rudder longer it was better but not great and it seemed a lot slower
Put a butterfly flap inside the exhaust pipe that only allows exhaust out. most I/O's have them. Or just use a muffler and exhaust it into the air instead of under the water. It will also help with the noise.
You need to make a u shaped rudder that is what they run on surface drives. And you need a water lock exhaust goggle it you will understand as soon as see one.keep up with the videos they are great your daughter is fantastic.
thanks! I just looked at the water lock exhaust and I like it
wholesome content alert!!!
I hope you filmed this before this cold snap came through. It is beyond miserable outside today. Mia is great value, and she did a cracking job of steering the boat. She must live on a diet of Harden Up pills.
We did it yesterday it was cold I'm glad we didn't fall in, she's pretty good at everything can ride a motorbike pretty well too
More rudder in the water. That will help a lot. As far as the exhaust goes. Prob be better to just run it out over the side. Less to worry about. Just water jacket the pipe. Pretty easy to do once you start doing it. Especially the way you are building your exhausts with short straight sections. Fun boat man. Love that you can just take it apart and toss it around. Can’t wait for the next video.
Ok thanks! I was thinking of just running the exhaust over the back , and I think a longer rudder is a good idea 👍
Man, that runs great! Why don't you run the exhaust out the side of the boat, or pipe it out the back either way above the water level?
I did have it out the back it was annoyingly loud and thought I would try this instead of a muffler. I might end up running it out the back again
@@DktheWelder What about a brass or stainless swing type check valve welded in-line. They make ones with no rubber. Would stop water from flowing backwards might make a ticking noise though.
What good fun. Look at a RC boat rudder an you will no what to do. Also look up the life saving boats, they have a good design for protecting the prop.
They have a cage around the prop which slows it down a lot . Yeah I see rc boats have the rudder off to the side sometimes too 👍
@@DktheWelder 1 bar under the prop maybe. When are you going to fit that 1000cc engine in a boat lol. Keep up the good work
Watching from the back it looked as though your rudder wasnt getting much purchase in the water and I am sure the steering linkage bending didnt help matters. I would either try a larger rudder that went deeper in the water below the turbulance from the prop or put 2 rudders on either side, below the bottom of the hull. If you want them to stay pivoting, might could put a spring on them to keep them in the water when running but still be able to pop up when striking an object.
yeah that is was thinking, I also think the rudder was getting pushed up/out from the water flow and not sitting as deep as it could of . I need to study the footage from the back a bit more
@@DktheWelder if you want to over complicate it, use pivoting hinge brakets like you did for the rudder to link the steering arm to the gunnel (or gunwales depending on where you are from) then to another at the stern linked to the rudder. This would control the amount of flex in your connecting rods and make them more resistant to bending while also out of the way of your leg. You can even apply some mechanical advantage by changing the length of the hinged bracket connection points. And as others have mentioned, spring loading the rudder so it stays in the water more.
However, every boat I have operated that uses a rudder does not turn like a regular outboard motor. It requires water passing by the rudder to steer.. Just keep this in mind. They are all slower to react, take longer to turn, and are highly dependent on the speed of the boat moving through the water not moving relative to the land. Going downstream a little faster than the current flow can appear to be moving fast but the rudder will act as if it is moving slow. Going upstream will have the opposite affect where moving slow compared to the land can steer more reactively because the water pushing past the rudder is moving faster. So different steering feels are to be expected.
Love the honesty of kids put a bleed point in the exhaust as a relief valve.
The rudder is way too small think of the surface area the paddle uses as you can drop the prop the rudder needs too able too cover that area plus a bit more I would probably put a four blade
You have built what we call in lauisiana a mud boat they or inboard shaft driven flat bottom boats that go through mud and grass with car engines down to 5hp air cooled engines ! The rudder needs to be behind the prop!
Yes ! I have been watching videos of them . I am changing the rudder at the moment hopefully it works next time
enjoyed your vid, i agree with the other comments that the rudder needs to be of a bigger surface area plus deeper, i would also suggests you fit a skeg, a keel that runs from the centre of the transom that will protect your prop plus it would add extra support to your new rudder at the base, the bottom edge, just a thought.
i forgot to add that with the exhaust if you fit a inverted U bend on the inner transom the water will not have enough strength to rise up the tube to flood the engine.
Ok . I might put plastic on the bottom as well to slide over rocks better , the u bend idea could work
You should try it with a motor again but more power would be a great little fishing boat for creeks
What about adding a duel side-by-side rutter setup? One solid bracket that holds 2 rutters. Just a thought. Thanks for the vids! :-)
That would probably work better. I tried a longer on in the next video but two might work better
@@DktheWelder Yeah, I'm thinking if you add a rudder, one on either side of the propeller that it will actually catch and guide the water left and right almost like a jet. Thus increasing your turning radius. I'm just brainstorming.
0:26 this cracked me up
thanks David
The helm axle of the rudder sits to far forward. The leading edge should be sationairy while steering. If you put your helm axle at about a quarter behind the leading edge, you get a balanced rudder. The fysical input gets a lot less so your rod is not bending any further.
For the reverse steering, you could flip the angle pivot up-side-down (the part that converts the longitudinal movement by the stick in a transverse movement towards the rudder). That reverses the movement of the rudder.
You could stick the rudder deeper but what is the point of a surface drive then? A rudder on a sailing boat also works, there is no prop. You could fit two rudders. The rudders need sufficient waterflow.
yes the pivot should be inline with the front edge of rudder I was wondering if that was the case and it was hard to push the lever, like the rudder hAD leverage over the controls. the rudder is on a horizontal pivot as well so it will swing out of the way when hitting obstacles so i could make it longer
The rudder needs to be a lot deeper into the water. The same depth as that prop fin, then it will work.
Ok that sounds good!
Rudder needs to be at least to center of prop the wash is what steers the boat also you need a check valve in your exhaust brother cool boat
Yes! check valve for exhaust , and change the pivot two simple fixes I like it mate!
Ya need a teleflex shaft for steering, or even use an old weed eater bent shaft cut to fit if you want to do it on the cheap. Has a flexible shaft inside that you can make slide to do the steering.
good idea!
The concept works well...a few more refinements
It did work pretty well for the first run , needs some refinements as you say👍
time for a sidemounted rudder, and a proper exhaust! less 90degrees, and more up and sloping downwards, just below the water surface :D
I subscribed for the workshop safety
Dude this is so cool! Iv been interested in jet drives recently and this project is really interesting!
Thanks, I made a jet drive as well but this works better so far
Good stuff mate.👍🏻
Thanks mate
Think you need an s trap like a toilet to stop the water in the exhaust
The rudder needs to go deeper as it barely covers half the prop
Keep it up!
I like that idea , longer rudder will help I think
@@DktheWelder yup - longer rudder!
First, at the end of your trip up it looks like there's a small dam or weir that's formed a very dangerous hydraulic jump. The boat was long enough and you were able to get out but had you gone over you may have gotten stuck there.
As for the rudder, it looks like it needs to be longer and possibly needs a spring so it gets into the propwash and can redirect it without kicking up. With the spring if you hit a rock it will still kick up. Maybe for testing you can bolt another piece of metal to the current rudder and try different depths so you don't make it any longer than you have to.
As for the exhaust, maybe a flapper on the outside. Even a metal one should work as it doesn't need to be fully sealed. When it's running the exhaust and water flow will keep it open but when you stop it will close and block the surge of water going back up.
We got to that rock ledge and didn’t have enough drive to get over it I glad we didn’t tip out because the water is cold this time of year. I am working on the rudder at the moment and doing everything you said 👍. I’m still working out the exhaust
I think you need a vacuum valve on the exhaust. It opens when a vacuum is present in the system, which will happen whenever it’s shut off and hot.
Dual rudders that pivot on either side of the blade directing the flow would probably do the trick there as well.
Nice job getting it out and working though!
would a valve like that handle the heat? 2 people for the double rudder now 👍
@@DktheWelder I would think so. I believe it’s just a ball with a spring. You can get brass or stainless. They do it on boats all the time for that exact reason
@@DktheWelder anti siphon valve I think they actually call them
@@limitlessbuilds o yeah I know what your talking about now , like a one way valve with a ball . I feel like I want to make one now haha
@@DktheWelder haha, give er! Not too hard I bet. Just need to find a ball bearing laying around and small spring
Don't put any more bends into your exhaust you need to remove the one that is there now and install a check valve you have to to much back pressure on that motor you will burn it up
ok. The exhaust has no muffler and is flowing well but I think any more bends could be too much
Absolute Coolest dad Ever! 😎
0:35 this man is a metal 3d printer
Where's the river? It's really nice!
Great vid mate! As always...
Thanks was a fun one!
father of the year what else is there to say xD
haha I try! I have two great daughters
Whoa dude! You should have a not safe for work warning...just for daring idiots like me. Have had more accidents than digits myself, and the "Boat & Toe" had me laugh out loud, hysterically....in the middle of a boring presentation....thus having to next explain my outburst to the group.Insult to injury, me laughing, farting and near shitting myself.....
That’s pretty funny, glad you laughed but not in a presentation!
bigger rudder, like 4x larger....or steer the prop somehow directionally instead of rudder
exhaust tube a straw, so needs perforation or one way valve, only gas out, but not water in.
11:35 nice greta thunberg there
you have to get Marty T. to build you a hydropower station on that river for free electricity from a washing machine.....simple principle you use gravity to spin the turbine with a drop or you cut a U shape in bank so water goes down U, spins turbine, then rejoins the river again....
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czcams.com/video/eANFU12z_-I/video.html
You're a rad dad!
thanks 👍
Love the vids man
ADD A 1 WAY VALVE ON THE EXHAUST.
Ok, the boat and drive is sketchy as fuck but your wee girl is rock solid, gold, mint.
No leaks!
I think there were some small ones but water came in from the rapids 👍
im 16 but i wanna do this with my future kids hahhaha
Having kids is like having a friend that always wants to play 👍
dude same lol
😎
second!
First!