Air Boat on snow?
#1
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Air Boat on snow?
How do air boats do on snow compared to water? Mine do fine in water but only the brushless one will move on grass. We may be getting some snow tonight! Don
#2
I think it is faster than either water or grass. I tried mine on snow, and the idle was a bit high, and was afraid to let it go, as it would have got away until it ran out of fuel. (Actually never tried it since. Big Swamp Buggy)
#3
My biggest boat has an Enya R120 4-cycle on it and at idle with a 13x8 prop it would easily go 5-7mph. It is absolutely scary how fast a boat will go on snow. Electric boats would be much easier to control than an IC boat would be.
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Yeah. they are faster on snow. The one gasser I have will do around 40 on snow/ice but will barley break 30 on water. Harder to control too because they just keep going and going and going, just remember, throttle up to steer and a blowover can bust things if the snow isn't really deep....but it's FUN!
Don't forget to video.
Don't forget to video.
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2" of soft snow, about 30 degrees. Alligator tours air boat.
Ran good but tended to bog down in snow if you turned to fast. lots of fun motor ran very cool, I got cold! Don
Ran good but tended to bog down in snow if you turned to fast. lots of fun motor ran very cool, I got cold! Don
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Hi Guys I am new here.
I would love to see a short video of a air boat on snow.
I am thinking about building one this winter for me and my 6 year old grandson to play with out on are pond out back of are condo next summer. The motor I plan to use is a weed eater motor with a 16x10 3 blade propeller. Now I just have to find the time to start the boat build in between my honey do list and rental work.
I live in the Columbus, OH we just got 2" of that white stuff this morning.
I would love to see a short video of a air boat on snow.
I am thinking about building one this winter for me and my 6 year old grandson to play with out on are pond out back of are condo next summer. The motor I plan to use is a weed eater motor with a 16x10 3 blade propeller. Now I just have to find the time to start the boat build in between my honey do list and rental work.
I live in the Columbus, OH we just got 2" of that white stuff this morning.
#10
Rick in Ohio - I'd start your own thread so you can ask questions and get advice more specific to your build. Just as a baseline, plan your bull build around the prop you plan to use while taking engine size into account. Plan on a size of approximately 42-48" long and 22-24" wide. Flat bottom hulls are easier to construct and behave more like a traditional airboat. Will your engine be setup as a pusher or puller (tractor)? What size engine?
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1QwkSport2.5r
I be-leave the motor is a 18cc and it will be a pusher. The guy that built the propeller conversion kit for me told me to go with a 16x8 2 blade or a 3 blade 16x10 pusher propeller with this motor. I went with the 3 blade thinking I could get a little more push out of the motor. It don't need to go fast ... I am just building it to have fun with when the grand kids are over and when I am not off shooting some where. This will be my first RC!
I be-leave the motor is a 18cc and it will be a pusher. The guy that built the propeller conversion kit for me told me to go with a 16x8 2 blade or a 3 blade 16x10 pusher propeller with this motor. I went with the 3 blade thinking I could get a little more push out of the motor. It don't need to go fast ... I am just building it to have fun with when the grand kids are over and when I am not off shooting some where. This will be my first RC!
Last edited by Rick in Ohio; 11-17-2014 at 08:39 AM.
#12
1QwkSport2.5r
I be-leave the motor is a 18cc and it will be a pusher. The guy that built the propeller conversion kit for me told me to go with a 16x8 2 blade or a 3 blade 16x10 pusher propeller with this motor. I went with the 3 blade thinking I could get a little more push out of the motor. It don't need to go fast ... I am just building it to have fun with when the grand kids are over and when I am not off shooting some where. This will be my first RC!
I be-leave the motor is a 18cc and it will be a pusher. The guy that built the propeller conversion kit for me told me to go with a 16x8 2 blade or a 3 blade 16x10 pusher propeller with this motor. I went with the 3 blade thinking I could get a little more push out of the motor. It don't need to go fast ... I am just building it to have fun with when the grand kids are over and when I am not off shooting some where. This will be my first RC!
I could be wrong, but your recommended prop choice seems too large to me.
#13
To add; at a typical gas engines peak rpm of say 8,500rpm, a 16x8 2-blade requires 2.3hp to turn at that rpm and provides about 14lb of thrust. A 16x10 3-blade spun at the same 8,500rpm requires about 4hp and makes about 20lb thrust. I suspect your engine may turn the 3-blade at maybe 6,500rpm? Best thing I can suggest to do would be get the engine on a test bench and get some props to try on it before building the boat. This will give you a baseline of what the engine can do which then allows you to determine how heavy you can build the boat so it will actually perform satisfactorily. Just my thoughts.
#15
And if you don't want a lot of speed, the lower the pitch, the lower the speed. In a perfect medium, a 6" pitch prop for example will provide 6" of forward movement per revolution. This doesn't take into account the friction of the medium. It is perfectly logical. Low pitch props are like tractors that can pull tree stumps. Example is 4.56:1 differential gears in a pickup truck. High pitch props are like a Ferrari super car with 2.73:1 gears.
Last edited by 1QwkSport2.5r; 11-17-2014 at 09:33 AM.
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I whipped together a tri-hull out of pink foam last winter. I found that it really helps to have a longer center hull for better control.
I used a 70mm edf motor with 4-cell battery.
It is really fast on snow!
https://scontent-a-lga.xx.fbcdn.net/...8b&oe=54D6081B
I used a 70mm edf motor with 4-cell battery.
It is really fast on snow!
https://scontent-a-lga.xx.fbcdn.net/...8b&oe=54D6081B
#18
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Had my Big Swamp Buggy out on powdered snow many times and it was fun !
Had it out on icy snow and it was not so much fun! I got it running and just touched the throttle and it was off sailing !
I was never in space but I could describe it like throwing a hockey puck outside a spaceship. The thing was off and nothing could stop it . Throttling up in an attempt to stop it spinning and to steer didn't accomplish much except to propel it much faster on it's journey. It went all the way down the runway and across a soccer field sized pasture until it finally met an incline and that slowed it down and finally stopped it. Got a lot of exercise that day trudging through 2 feet of ice crusted snow retrieving it.
After that I thought of adding a "water rudder" similar to my float planes but ever did it.
Had it out on icy snow and it was not so much fun! I got it running and just touched the throttle and it was off sailing !
I was never in space but I could describe it like throwing a hockey puck outside a spaceship. The thing was off and nothing could stop it . Throttling up in an attempt to stop it spinning and to steer didn't accomplish much except to propel it much faster on it's journey. It went all the way down the runway and across a soccer field sized pasture until it finally met an incline and that slowed it down and finally stopped it. Got a lot of exercise that day trudging through 2 feet of ice crusted snow retrieving it.
After that I thought of adding a "water rudder" similar to my float planes but ever did it.
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I build an rc sled a long time ago. It was a catamaran with 2 big rudders to steer. it looked nice and was fast with a 25 size engine.
But it was almost impossible to steer, it didn't like to turn and it had to be even, every little hill would get it off track.
And then, it wasn't too much fun, by the time you had everything ready to go, your hands were frozen, so I didn't do any more research.
Today, I'd set it on skis and have a brushless setup. And wear gloves...
But it was almost impossible to steer, it didn't like to turn and it had to be even, every little hill would get it off track.
And then, it wasn't too much fun, by the time you had everything ready to go, your hands were frozen, so I didn't do any more research.
Today, I'd set it on skis and have a brushless setup. And wear gloves...
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I noticed both in the water and on the snow that the wind makes it hard to steer. Would a small chine on the bottom of the boat help keep it straight? Most flat bottom boats are hard to control . A rib going down in the water/snow might help but if it were hard ice you would need what the snowmobilers call a carbide skid. Don
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I'd think it help a lot, but it needs to be real sturdy, you'll be hitting small stones, ice and other things at a high speed.
And if you had to repair it all the time, it would take the fun out of it.
Maybe some spring - loaded contraption would be good here
And if you had to repair it all the time, it would take the fun out of it.
Maybe some spring - loaded contraption would be good here
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Here is some videos of my airboats on the snow. It's a playlist, so sit back and enjoy.
https://www.youtube.com/playlist?lis...VZw6wiW3Oezilq
Yeah, that prop is going to be too big for that engine. I use a 16x8 3 blade on my 36cc airboat.
https://www.youtube.com/playlist?lis...VZw6wiW3Oezilq
Yeah, that prop is going to be too big for that engine. I use a 16x8 3 blade on my 36cc airboat.
Last edited by crispyspa; 11-18-2014 at 08:55 PM.
#25
Nice video's there crispyspa, the SI looks like it handles well with one rudder, and the stunt driving, must have taken a lot of practice Lol.
Sorry Don don't mean to intrude. I made a spring loaded rudder that protruded down below the transom years ago and it worked quite well without an air rudder. I wouldn't run it on the street being made out of aluminum. If you'd like a pic let me know and I'll pop one up for you. Cheers
Sorry Don don't mean to intrude. I made a spring loaded rudder that protruded down below the transom years ago and it worked quite well without an air rudder. I wouldn't run it on the street being made out of aluminum. If you'd like a pic let me know and I'll pop one up for you. Cheers