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-   -   My Laser Cut Air Boat PROTOTYPE (https://www.rcuniverse.com/forum/rc-airboats-246/9095767-my-laser-cut-air-boat-prototype.html)

claserdesigns 09-14-2009 06:30 PM

My Laser Cut Air Boat PROTOTYPE
 


Hello Guys,

I'm designing an Air Boat from laser cut MDF 1/8" forfuture selling and I'm working on the prototyperight now ,reducing weight, testingthe adjustable motor mounts andother stuff,and I was wondering what type of prop should I use. The Airboat measures 15" x 8.5" , I'm using a 6x4 prop and a 2300kv brushless motor with a 11.1v Lipo. My goal is to make a kit with Boat, Motor, Esc and Prop ARR

What prop should I use with the hardware that I currently have? or is the 6x4 a good choice?

The only videos I have so far is on the grass and on the carpet, I will try water once I seal the bottom and add the top cover.

Motor Tested 1,800kv outrunner
[youtube]http://www.youtube.com/watch?v=HqrRKnenyhs[/youtube]

[youtube]http://www.youtube.com/watch?v=1zZWtY3ZmkY[/youtube]

MOTORTested 3,625kv inrunner
[youtube]http://www.youtube.com/watch?v=ZXpgpzYQFoc[/youtube]

[youtube]http://www.youtube.com/watch?v=923hOJm53QA[/youtube]



http://img43.imageshack.us/img43/7987/2015427.jpg

http://img15.imageshack.us/img15/4750/2015426.jpg




</p>

jesupslanding 09-14-2009 11:06 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
lookin good. but i kno nothin bout electric. im a gasser boy.. there is some here that is gonna help

nick_75au 09-15-2009 03:04 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
MDF???

Wouldn't exterior ply at minimum be appropriate, or is this just a trial run?

Other than that, looks like a good build.

Nick

Rowboat 09-15-2009 04:43 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
I like your build , looks good and looks like it has lots of power. One question what size ESC are you using?

nick_75au 09-15-2009 04:57 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
Looks like a super simple 40 amp from Hobbyking, packaging has changed recently though.

b16a2sir 09-15-2009 08:32 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
If you are going to be selling, I would highly suggest to include the prop shield for safety reasons. Looks like a solid boat and well put together, nice job!

claserdesigns 09-15-2009 09:26 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
Yes I choosed MDF because is what Imainly do other parts that I sell, and is light weight and strong, I get super clean cuts with my laser cutter using this material. Using epoxy or fiberglass resing will seal the bottom real good. BUT this is the prototype, I already tested a bare MDF piece under wet conditions to see if I get some expanding reaction like other fiber board materials, and so far nothing happends, the material could chance depending on what happends when I do a LONG test using hot water. I can do this boaton ply, abs, plastic, delrin, acrylic, and other non-metal materials.

A few chances that I will be doing is re-designing the motor mount area ( I will be doing a design for Nitro or Electric motor) the boat will have an universal motor mount base) and adding the prop guard. And making it as light as possible too.


ORIGINAL: nick_75au

MDF???

Wouldn't exterior ply at minimum be appropriate, or is this just a trial run?

Other than that, looks like a good build.

Nick

claserdesigns 09-15-2009 09:30 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
The prop shield is on the works, I think I will have the complete boat done for real testing by this weekend.

ORIGINAL: b16a2sir

If you are going to be selling, I would highly suggest to include the prop shield for safety reasons. Looks like a solid boat and well put together, nice job!

claserdesigns 09-15-2009 09:41 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
I just realize that the motor I'm using is a 1800kv only not a 2300kv, I will install a faster motor and do another test to see how it works.

asmithnc 09-15-2009 10:07 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
As a Prototype it's slow. Whats the weight? I see your tabs all over the place and I think this it's a good idea as seen in the SI3's, you just took it to the extreme. I bet this would be the fastest airboat kit build in the world but I have some issues. You did not ask for advice so I won't. It's nice to see a new guy here with great resourses. Andy

claserdesigns 09-15-2009 11:00 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
Wow, I just tested the other motor that I had a small 3,625kv inrunner and this thing really slide on the grass. But I aparently burn the motor because a funny smell came from the airboat, you can see on the second video that it starts to loose power, a few seconds later I got hit with the burn electronics smell. I think the 6x4 prop that I used is to big for this motor.

I tried to flip the AirBoat several times and nothing happend, I think the 6x4 propeller is perfect size for this Air Boat , but now I need to create the correct combo for the Motor (inrunner or Outrunner) and ESC.

It's hard to control the airboat and record at the same time, I'm using a Airplane stick controller :(
[youtube]http://www.youtube.com/watch?v=ZXpgpzYQFoc[/youtube]
[youtube]http://www.youtube.com/watch?v=923hOJm53QA[/youtube]



This is the motor I tested


http://img183.imageshack.us/img183/1144/2015429.jpg




claserdesigns 09-15-2009 11:05 AM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: asmithnc

As a Prototype it's slow. Whats the weight? I see your tabs all over the place and I think this it's a good idea as seen in the SI3's, you just took it to the extreme. I bet this would be the fastest airboat kit build in the world but I have some issues. You did not ask for advice so I won't. It's nice to see a new guy here with great resourses. Andy
Tell me your advise:) your input is welcome, I want to design a good kit.

Also the motor I tested the first time it was only 1800kv, I just tried a 3625kv motor and now it moves.

asmithnc 09-15-2009 12:00 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
You made me smile.....now it has the r's it was missing. My advice would be to change it's designed but after much thought it's what make it different. Usally we use a single sheet form the transom to the bow but like I said before your is a little different.

Suggestions

Materials: Balsa..Ply or combo.... Depron.... Mdf scares me.

Length: 15" is to short. I see 20" to 22". I fear a short boat will do nothing but spin out on the water.

Motor stand: Is the motor getting any cooling.

Bow: Do away with the blunt nose.

nick_75au 09-15-2009 11:44 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
MDF is a great material I agree but not for boats or anything that will get wet, it will disintegrate unless completely sealed, even moisture from condensation will affect it. Lite ply I think would be great or one of the plastics for that instant finish, no painting:D
Nick

claserdesigns 09-17-2009 11:19 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: nick_75au

MDF is a great material I agree but not for boats or anything that will get wet, it will disintegrate unless completely sealed, even moisture from condensation will affect it. Lite ply I think would be great or one of the plastics for that instant finish, no painting:D
Nick

Found I new material to use, and I also bought different props and motors to test, I think the complete kit will be ready in about a week, I will offer them without motor, with motor and ESC, and with nitro engine mount. (I'm working in a Hovercraft also) :) that will be more fun

claserdesigns 09-18-2009 09:35 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
I just did a test run with the new Motor and Prop combination and it worked great while it last, I tested the boat in the grass and had almost the same speed like video 3 and 4. But on this test I tried on the street and it ran great a couple of times until I decide to record the video when it took fly and smashed into the ground.

Enjoy the video Click HD for better view. (thank God this is the prototype) the crash let me to a faulty motor mount design, that I'm fixing right now.

[youtube]http://www.youtube.com/watch?v=mWVRsdTTunw[/youtube] Right click the video and choose view in youtube if you want to see it bigger

http://img196.imageshack.us/img196/1266/photoof.jpg

claserdesigns 09-20-2009 07:26 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


Here is the finish prototype ready for more testing. (final product would be in plywood)</p>

I have to buy a new 6x5.5 prop to tested (it broke on the crash) the one installed 6x4 and it wont be the same.</p>

I'm going to seal the outside and tested on the water, hopefully everything goes as planned so I can put them for sale on my webpage.</p>

What do you think so far?</p>

http://img16.imageshack.us/img16/8489/2015430medium.jpg</p>

http://img198.imageshack.us/img198/1...5438medium.jpg</p>

http://img21.imageshack.us/img21/721/2015439medium.jpg</p>

http://img21.imageshack.us/img21/5227/2015440medium.jpg</p>

http://img87.imageshack.us/img87/6734/2015441medium.jpg</p>

RS 38-40 09-20-2009 11:33 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
How were you intending to seal the motor wire hole and the rudder push rod hole ?

claserdesigns 09-21-2009 08:06 AM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: RS 38-40

How were you intending to seal the motor wire hole and the rudder push rod hole ?

I will be using a more universal hardware on the final rpoduct the linkage of the rudders, etcwill change,I will be using rubber boots similar this for the wires and push rod holes. For now I can't choose the correct size or hardware to use until I test this on the water :)

http://img32.imageshack.us/img32/4337/trab1577.jpg

claserdesigns 09-21-2009 09:32 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
<span class="postbody">Ok I did a little test with the 6x4 prop, it worked but not as good as the 6x5.5 prop that I tested before. (i'm going to the hobby shop today to buy some spare props before going to the pond/lake)

[youtube]http://www.youtube.com/watch?v=PDfFK3oYmXs[/youtube]</span>

Hijikata 09-24-2009 01:48 AM

RE: My Laser Cut Air Boat PROTOTYPE
 
This is really awesome!!! I want to build an electric myself, but I am not quite sure how to mount the motor, I was looking to do a pusher type. Also, how do you set up the steering servo to control the rudders?

claserdesigns 09-24-2009 03:39 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: Hijikata

This is really awesome!!! I want to build an electric myself, but I am not quite sure how to mount the motor, I was looking to do a pusher type. Also, how do you set up the steering servo to control the rudders?
I will be selling this kit pretty soon I just finished some touches on the final design, the price for this kit will be $69.99, and $119.99 with Motor/ESC/Prop, and its fastttttt

claserdesigns 09-24-2009 03:41 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


Ok guys, FINALLYa water test, it went pretty good but, I need to relocate the battery location to the back, I have to much weight in the front, and I will be adding some small fins at the bottom to get more control.

This is a small test, I will take better videos later on once I finish the new changes.

RIGHT CLICKon the video and choose watch on youtube for HD resolution and bigger size

LAKE TEST (unedited video)
[youtube]http://www.youtube.com/watch?v=Ds-WKlWRW1M[/youtube]</p>

LAKE TEST (slow motion)
[youtube]http://www.youtube.com/watch?v=AjqDzyyO_78[/youtube]</p>

STREET TEST (trying to flipped and testing strenght of the hull)
On this test it flipped more than 5 times, one on camera and the others behind the camera when it pass me, motor mount and rudder design holded very strong, I was lucky that the propeller didnt received any damage. The rudders worked as a shield.</p>

More testing to come.
[youtube]http://www.youtube.com/watch?v=uEajsyfEMYc[/youtube]</p>

kieran3008 09-24-2009 03:55 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
i so want one of these! ship it to uk free of charge :P, how mush would u charge to ship it id want the one with the eletronics

claserdesigns 09-24-2009 04:10 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: kieran3008

i so want one of these! ship it to uk free of charge :P, how mush would u charge to ship it id want the one with the eletronics
I'm guessing shipping alone will be around $25-30 for international

Hijikata 09-24-2009 08:38 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: claserdesigns



ORIGINAL: Hijikata

This is really awesome!!! I want to build an electric myself, but I am not quite sure how to mount the motor, I was looking to do a pusher type. Also, how do you set up the steering servo to control the rudders?
I will be selling this kit pretty soon I just finished some touches on the final design, the price for this kit will be $69.99, and $119.99 with Motor/ESC/Prop, and its fastttttt

Man if you are selling these at christmas time, I will personally come buy one off of you :)

I will be back in home, in Florida, for christmas, and would love to have on of these little guys.

One other question, whats the biggest motor you can have on the ESC you are using :D What is the max amperage?

claserdesigns 09-25-2009 07:51 AM

RE: My Laser Cut Air Boat PROTOTYPE
 



Man if you are selling these at christmas time, I will personally come buy one off of you :)

I will be back in home, in Florida, for christmas, and would love to have on of these little guys.

One other question, whats the biggest motor you can have on the ESC you are using :D What is the max amperage?
The ESC that I'm using is a 40amp , and the motor is an outrunner 2200kv and a 6x4 prop. And to run like this I'm using a 11.1v lipo-2250mAh 30C. I will test the same setup today with a 7.2v lipo for those of you that want to go slower and have safe fun :D

You can use other motors inrunners and outrunners, the motor bracket has a universal mount, but you will have to keep in mind that a 6" prop is the biggest you can use on this airboat.

claserdesigns 09-25-2009 01:53 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


:( I went to my local lake around 20min from home, with my 2-1/2 years old daughter, had all the gear (batteries, extra prop, ETC) EXCEPT a philips screw driver, I prepared the airboat last night and forgot to tight the screws that hold the servo in place, I did one test and I couldn't controlled propertly, it went crazy to the Right or to the Left without me touching the steering, when I check it everything the 2 screws holding the servo were in place but loose, in other words the steering servo was responding but because it was loose it made the rudders crazy when I went full throttle.</p>

Even with that I think it ran a little better.</p>

Tomorrow again I will take another video with all that fixed and I will add some fins at the bottom to make sure I have control.</p>

I have my GPS ready to get some speed readings too :)</p>

Here is the video
[youtube]http://www.youtube.com/watch?v=AJvHrS0ET4U[/youtube]</p>

Hijikata 09-25-2009 02:54 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
Looks awesome, can't wait to hear the speed readings :)


I was thinking you might not need to locate your batter that far back if you put a cage around the propeller. Not only would it make the boat safer, but it would also add weight to the back.

Check out some of the ones on [link]http://www.cajungatorairboats.com/[/link] if you are not sure what I mean by a cage ;)

claserdesigns 09-25-2009 03:18 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: Hijikata

Looks awesome, can't wait to hear the speed readings :)


I was thinking you might not need to locate your batter that far back if you put a cage around the propeller. Not only would it make the boat safer, but it would also add weight to the back.

Check out some of the ones on [link]http://www.cajungatorairboats.com/[/link] if you are not sure what I mean by a cage ;)
I will do a cage for them but I will sell it apart, for those people who want to be safer, but for speed NOCAGE hehe. I'm thinkinh on making the airboat a little longer, but all depends when I fix the problems of the servo and add the fins, and I might raise a little the front lip.

Hijikata 09-25-2009 03:51 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: claserdesigns



ORIGINAL: Hijikata

Looks awesome, can't wait to hear the speed readings :)


I was thinking you might not need to locate your batter that far back if you put a cage around the propeller. Not only would it make the boat safer, but it would also add weight to the back.

Check out some of the ones on [link]http://www.cajungatorairboats.com/[/link] if you are not sure what I mean by a cage ;)
I will do a cage for them but I will sell it apart, for those people who want to be safer, but for speed NO CAGE hehe. I'm thinkinh on making the airboat a little longer, but all depends when I fix the problems of the servo and add the fins, and I might raise a little the front lip.

What is the size now? And I know the Cajun Gators use a slightly raised front lip, give the rake look and it is good for when approaching the water from some angles. It helps keep the nose out of the water ;)

claserdesigns 09-25-2009 09:43 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
I was going to raised the lip a little more, but the boat is running very fast and raising the lip will make the boat take flight. I still have to play with the design a little, but I'm almost there, what is holding me is the taking care of my daughter and having the lake a little far.

Hijikata 09-26-2009 02:43 AM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: claserdesigns

I was going to raised the lip a little more, but the boat is running very fast and raising the lip will make the boat take flight. I still have to play with the design a little, but I'm almost there, what is holding me is the taking care of my daughter and having the lake a little far.

If you put the battery back into its original spot (if it's been moved) and add the lip on the front wouldn't they help balance each other?

You were discussing moving the battery back to keep the nose up, but if you add the lip the speed of the boat will keep the nose up from the natural pushing of the wind. Or is there something here that I am not quite seeing?

claserdesigns 09-26-2009 08:28 AM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: Hijikata



ORIGINAL: claserdesigns

I was going to raised the lip a little more, but the boat is running very fast and raising the lip will make the boat take flight. I still have to play with the design a little, but I'm almost there, what is holding me is the taking care of my daughter and having the lake a little far.

If you put the battery back into its original spot (if it's been moved) and add the lip on the front wouldn't they help balance each other?

You were discussing moving the battery back to keep the nose up, but if you add the lip the speed of the boat will keep the nose up from the natural pushing of the wind. Or is there something here that I am not quite seeing?
Here is a pic that can explain better the changes I made on the layout and the before and after level of the boat.

http://img38.imageshack.us/img38/923...floatlarge.jpg

Rowboat 09-26-2009 06:13 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
That should work a lot better, More control in the turns.

asmithnc 09-26-2009 08:12 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
I see no reason why an electric boat need a prop guard.

stackeddeck 09-26-2009 10:57 PM

RE: My Laser Cut Air Boat PROTOTYPE
 
How much will it cost? :D

claserdesigns 09-26-2009 11:45 PM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: stackeddeck

How much will it cost? :D


So far depends on the final material I'm going to use, right now I can't find good quality plywood on1/8" to be on the pricerangeIhad in mind"kit price at $69.99 (no motor/esc/prop) or $119.99 with motor/esc/prop" this price is not final but it wont be cheaper than that hehe, hopefully I can get the material I need at a good price so I can keep the prices lower. The nitro version will be soon available as soon I finish the last touches on this electric one.

Hijikata 09-27-2009 03:17 AM

RE: My Laser Cut Air Boat PROTOTYPE
 


ORIGINAL: asmithnc

I see no reason why an electric boat need a prop guard.
A little bit of extra safety never hurt anyone, also makes it a bit more of a replica, and finally it ads a bit of extra wait to the back to help counter the weight the battery was putting in the front (this is a non issue now with the relocation of the battery).

asmithnc 09-27-2009 07:41 AM

RE: My Laser Cut Air Boat PROTOTYPE
 

ORIGINAL: Hijikata


A little bit of extra safety never hurt anyone, also makes it a bit more of a replica, and finally it ads a bit of extra wait to the back to help counter the weight the battery was putting in the front (this is a non issue now with the relocation of the battery).

How safe do you need to make an electric airboat. The prop does not move until you hit the throttle. Throw it in and walk away and let the power flow. I have no idea why it needs one.

Now, combustion engine are different. Once fired they always run and there is a risk.

Once airplane guys go to prop guards I too will also follow.


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