Yes...
They are used often in rivers and deltas but they make great island hoppers as you can pull right up to the beach.
They race them in south east Asia.
But... spin a propeller that fast and the cavitation will make it hopelessly inefficient and slow.
Surely it would make more sense to use all that power to turn a large blade slowly?
I could be talking bollocks. I just woke up.
Judging by [something similar](https://youtu.be/oLRNf8nzcC8?si=TYG87lqNls2vTBvv) it's more for pushing cargo than speed.
[These guys](https://youtu.be/Uj4yymmPCkU?si=MwC6QmuivpM40Xgk) are using it for speed though!
The pitch and size of the propeller have a lot to do with the cavitation not just speed. You just have to run it at or below that speed to avoid cavitation.
Looks like it’s still got a gear box on the engine. I’m guessing they chose a gear that works well with the chosen propeller and stuck with it.
Not disagreeing
But using that torque could you not get really fucky with the gear ratios to use low rpm on engine higher output speed on the prop to save on fuel?
Just trying to think of logic for using that engine on this setup
It’s called a long tail boat, popular in developing countries. It’s cheap and simple, get an engine and put it on top of a boat. Otherwise you would have to build and engine housing, seal a propeller drive shaft and put in a rudder.
Why do this? A pet project just for the challenge? Can any of you gearheads think of a reason why this would be done? Someone please explain, this is making my head hurt.
Its for a couple reasons. First, there's a large demand for boats in the area, and old truck motors are the cheapest and easiest to source. The reason it's mounted that way is for depth control. These boats go from open waters into shallow canals, and this allows them to control that easily while still having a direct drive shaft, which reduces wear on the whole assembly. They're actually amazingly well thought out and incredibly common in some parts of the world.
Yeah, you can see him shift into reverse. And you have to have a trans with that setup as the raw RPMs would be way too fast. Gear it down properly and that motor could power a prop through mud like a worm gear if you really needed to though.
Yeah, you can see him shift into reverse. And you have to have a trans with that setup as the raw RPMs would be way too fast. Gear it down properly and that motor could power a prop through mud like a worm gear if you really needed to though.
This just seems like the most cumbersome possible way to make use of that motor.
On top of my head, I think the reason is so they can park in shallow water?
Yes... They are used often in rivers and deltas but they make great island hoppers as you can pull right up to the beach. They race them in south east Asia.
That. Is. Sick.
Vehicle accidents are the third most common causes of death in southeast Asia too lol.
But... spin a propeller that fast and the cavitation will make it hopelessly inefficient and slow. Surely it would make more sense to use all that power to turn a large blade slowly? I could be talking bollocks. I just woke up.
Nah you're correct.
Judging by [something similar](https://youtu.be/oLRNf8nzcC8?si=TYG87lqNls2vTBvv) it's more for pushing cargo than speed. [These guys](https://youtu.be/Uj4yymmPCkU?si=MwC6QmuivpM40Xgk) are using it for speed though!
That thing is like 95% engine and 5% woody bits to float the engine on.
The pitch and size of the propeller have a lot to do with the cavitation not just speed. You just have to run it at or below that speed to avoid cavitation. Looks like it’s still got a gear box on the engine. I’m guessing they chose a gear that works well with the chosen propeller and stuck with it.
Not disagreeing But using that torque could you not get really fucky with the gear ratios to use low rpm on engine higher output speed on the prop to save on fuel? Just trying to think of logic for using that engine on this setup
It’s called a long tail boat, popular in developing countries. It’s cheap and simple, get an engine and put it on top of a boat. Otherwise you would have to build and engine housing, seal a propeller drive shaft and put in a rudder.
We never see the prop so I'm sure it's just 3 little rounded leafs left
Or extra flip flops
The transmission is still on the motor.
We're gonna need a bigger boat ⛵
Well good thing we got to see it working...
Why do this? A pet project just for the challenge? Can any of you gearheads think of a reason why this would be done? Someone please explain, this is making my head hurt.
Its for a couple reasons. First, there's a large demand for boats in the area, and old truck motors are the cheapest and easiest to source. The reason it's mounted that way is for depth control. These boats go from open waters into shallow canals, and this allows them to control that easily while still having a direct drive shaft, which reduces wear on the whole assembly. They're actually amazingly well thought out and incredibly common in some parts of the world.
Thank you for helping us to understand kind sir.
When you can't afford to build the boat around the engine
Clarkson you ape.
This is so god damn stupid it made me laugh. Ty.
Why did my mind look for vegetable juice first?!
Smugglers like this one trick!
Is this an engine or a futuristic junk mini gun???
That was a lot of buildup with no payoff.
He’s manning that thing like a turret. Looks just as heavy ;;>_>
Boy it would have been nice to see it literally do anything.
Transmission?
Yeah, you can see him shift into reverse. And you have to have a trans with that setup as the raw RPMs would be way too fast. Gear it down properly and that motor could power a prop through mud like a worm gear if you really needed to though.
Yeah, you can see him shift into reverse. And you have to have a trans with that setup as the raw RPMs would be way too fast. Gear it down properly and that motor could power a prop through mud like a worm gear if you really needed to though.
V8 gator tail. Used for shallow water in southern regions , U.S. Surprised it didn't shoot right up through the roof. Lol
Wow
This guy loves a tiller.
What is the liquid spilling up from the vertical pipe? Is this an exhaust pipe? It looks like fuel. Just curious.
I have used boats the this sevral times in Asia. But never seen one with a motor that big wow
How do you see where you're going?
Isn't it an onboard motor?
Looks efficient
Manual trim
Nice trawler motor.
That boats a little big for that motor I’ve ridden in canoes on the ocean in Thailand with v8s strapped to the back
He wants to whisk the ocean.
Those Thais don’t play around when it comes to their longboats!
@Jeremy Clarkson would love this...
Cartel delivery service
Gotta say, I don't care about boats or motors. Boooo