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60cc airboat maiden voyage

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Old 12-05-2017, 10:40 AM
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jjonas
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Default 60cc airboat maiden voyage

Maiden voyage my scratch-built airboat the other day! I feel lucky to find open water here in Montana in December, but it probably won't stay that way for long.
Only got to about 1/3 throttle as I was a bit timid with it. Looks like it could use more weight up front?
The cage is made of steel and I've thought about reconstructing it using aluminum to shift the balance forward.
I'm hoping to test out the FPV and auto-pilot soon.
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Old 12-06-2017, 07:02 AM
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Lester Burch
 
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What is the size and weight of your boat.
It looks good.
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Old 12-06-2017, 08:00 AM
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Thanks.
It's 3' x 5' and weighs about 45 lbs. The cage alone weighs 15 lbs. I think one made out of aluminum would only weigh half as much.
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Old 12-06-2017, 08:39 AM
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Where is the CG now? You won’t know if it is right or not until you can give the boat full throttle.


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Old 12-06-2017, 02:04 PM
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jjonas
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Originally Posted by Got RPM View Post
Where is the CG now? You won’t know if it is right or not until you can give the boat full throttle.
.
Good point. Once we get better weather, I'll have to go see what it can do and how it responds.
The CG is about 1.5ft forward of the transom, putting it at about 1/4 of the entire hull length (measured from the transom).
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Old 01-09-2018, 03:01 PM
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ElectricFlyGuy
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I can see why you are hesitant to go much past 1/3 throttle as it may just be top heavy and it seems to sit low in the water. But, you found some nice smooth waters and that is the best kind in that case. It would take some force to uproot it and flip it over. I hope you are prepared for a flip over and the question is, is it very buoyant just in case? Is that box well sealed? If so, then I would say yes it won't sink. My electronics are in a water proof RC case built into my boat. I wouldn't go fast while turning until you build that aluminum frame/cage. I put mine trough heck and it's very stable with my aluminum framework.I'm sure you would have no trouble going near full throttle on smooth water and with as much as it weighs also holding it firmly in the water. Let us know what changes you make and I think a 36" width makes that a very stable boat at 5' long for sure! Very nice! I would like to build a 6' X 3' and was wondering is you did a build thread or if you took build photos? IF not, can you tell us how it is constructed? What plywood? Fiberglass? Your hull don't look very deep. I think the height should be approx 6" to at least 8" ( per your scale) to really float and maneuver well. Thanks. Scott
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