Nice, but I would seriously change the reduction to free up the engine and roll the pitch to those "R" blades. The "R" blades love the pitch. My small block swings a 84" 5 blade Sensenich "S" (superwide.)
+Antrigen UM, you do know that without torque there is no such thing as horsepower right? I am very familiar with airboats and have custom built several big prop monsters and know what I am talking about. With that being said a gear reduction is a torque multiplier.
+Turbo Chevelle I have no doubt that you know what you are talking about. My comment is that this is a workboat and as such requires a lot of very precise small moves to position it often with very heavy loads and that is best accomplished with lower rpm's so that the boat does not suddenly jump. Along with the multiplication of torque, there is a decrease in rotational speed of the output shaft compared to the input shaft when using a reduction gear so the engine would to turn higher rpm's to get the same prop speed taking him out of the torque range of the engine. Torque gets you moving and hp gives you the top end.
I am very aware of the work boats as well quad engine and so on. A friend of mine builds them and I also have worked my boats from survey to pipeline and environmental. The engine like a bigger gear reduction because it takes the load off of the engine resulting in better longevity. Also with the higher reduction ratio equaling lower tip speed you have a huge reduction in noise which is also a plus. My last boat swung an 84" Diameter 5 blade Sensenich Superwide and at wide open throttle at 50 foot the boat registered 89 decibels. The boat was quiet and an absolute bulldozer. At 5200 rpm my prop speed was 1,666 rpm. Everyone said it wouldn't work and it proved everyone wrong. The funny thing is that I did it with a custom built 397ci SBC built with 5.850" rod and custom pin height pistons.
weooow nice big fat beautiful blades, where do you get them? I am dying day and night to find suppliers of cheap around 80" blades or props, my rpm would be around 1100
that looks like alot of fun the roaring of the engines nice looking boat i wish a had a toy like that i also want to say nice boat micheael
gawd ....that boat is amazing....hearing the roar of those awsome v8 s ...what a power house...
I want a Toy like Dat ......... Nice one Ken the more power the better.
I like your boat so good.
@Mako561 Mostly made for shallow water marsh work. Not sure about offshore work.
wow what a shallow clamming rig that would be. i'm jealous in the good way.
Fantastic!!!!
could u route the exhaust down through the hull an exit into the water so more quiet?
??? Maybe but may cause leaks. I've seen some with mufflers and different style blades that quiets them down
That would create too much back pressure and reduce the power.
are you using it for logging or construction/land work?
What kind of engines are those?
You should have a look at my twin engine rc airboats video.
Just didn't water test it yet.
Nice. Post a vid when u water test. I'd like to see that
What props are you running that will handle 5000+ RPM or is that the engine speed and you have gear reduction?
That's the engine speed. I think he is running 2:1 gear reduction
Hola qué tal por fa que dimensiones tiene el bote y que motores tiene gracias
Nice, but I would seriously change the reduction to free up the engine and roll the pitch to those "R" blades. The "R" blades love the pitch. My small block swings a 84" 5 blade Sensenich "S" (superwide.)
I agree
+jrichard73 The boat is running twin 540ci Chevy Big Blocks and I imagine he is trying to turn the props more with torque than hp. Reduction is 2:1
+Antrigen UM, you do know that without torque there is no such thing as horsepower right? I am very familiar with airboats and have custom built several big prop monsters and know what I am talking about. With that being said a gear reduction is a torque multiplier.
+Turbo Chevelle I have no doubt that you know what you are talking about. My comment is that this is a workboat and as such requires a lot of very precise small moves to position it often with very heavy loads and that is best accomplished with lower rpm's so that the boat does not suddenly jump. Along with the multiplication of torque, there is a decrease in rotational speed of the output shaft compared to the input shaft when using a reduction gear so the engine would to turn higher rpm's to get the same prop speed taking him out of the torque range of the engine. Torque gets you moving and hp gives you the top end.
I am very aware of the work boats as well quad engine and so on. A friend of mine builds them and I also have worked my boats from survey to pipeline and environmental. The engine like a bigger gear reduction because it takes the load off of the engine resulting in better longevity. Also with the higher reduction ratio equaling lower tip speed you have a huge reduction in noise which is also a plus. My last boat swung an 84" Diameter 5 blade Sensenich Superwide and at wide open throttle at 50 foot the boat registered 89 decibels. The boat was quiet and an absolute bulldozer. At 5200 rpm my prop speed was 1,666 rpm. Everyone said it wouldn't work and it proved everyone wrong. The funny thing is that I did it with a custom built 397ci SBC built with 5.850" rod and custom pin height pistons.
2:26 wow, I would not have believed that until I saw it
weooow nice big fat beautiful blades, where do you get them? I am dying day and night to find suppliers of cheap around 80" blades or props, my rpm would be around 1100
I think they are from sensenich.com and they can custom build blades to the size you want.
I did not see it plane off set up maybe?
The neighborhood fovorite. Hahahahahahahah, right.
Is that in Bayou Teche?
Yes
Why no seats? No beer holders Lol!
This was just a test to see if it can handle a load. He mounted a large crane on deck and wanted to make sure it would still run dry land
Beer holder is right or left hand! We don't put them down! Lol
It cant even get out of its own way!!! Lol
very cool must be thirsty but I bet it flies with only 1 guy on board.
Insane,,,,,WoW..
Its an offshore airboat
cuanto cuesta
Not a single life jacket, lol
I don't want his fuel bill!!..lol
Barely !
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da fuck ???
to wide to heavy red line it to move on land junk