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Can I build a RC airboat using a car engine?

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Can I build a RC airboat using a car engine?

Old 10-31-2020, 07:30 PM
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LeagueOfChungus1
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Default Can I build a RC airboat using a car engine?

As I said, I need some replies about the title, I have another question. What fuel tank should I use and how should I connect tubes? Engine type is nitro


Last edited by LeagueOfChungus1; 10-31-2020 at 08:47 PM.
Old 11-01-2020, 08:51 AM
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You haven’t supplied enough information for anyone to give you a meaningful answer. We have no idea what engine you want to use, how long you want to run or how big the boat is. What engine? “Nitro” tells us little, is it a .12, a .21 or a .32? Rpm range? Muffler or tuned pipe pressure? Where do you want to mount the tank, on the deck or behind/in front of the engine? Pusher or tractor? Thrown us a bone!




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Old 11-01-2020, 09:00 PM
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My engine is KE15SP which is 2.5cc.I think 40cm length boat will be appropriate for my engine. However Im considering to use OS 15LA airplane engine. The boat will be pusher.
Old 11-02-2020, 06:14 AM
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Sigh. Last chance. Unanswered questions:
  • Rpm range?
  • Muffler or tuned pipe pressure?
  • Where do you want to mount the tank, on the deck or behind/in front of the engine?

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Old 11-08-2020, 04:18 AM
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Airplane engines are MUCH better suited for air LSTs than car engines. Car engines require custom parts made to allow booting a prop onto the crankshaft in most cases. Once the engine is sorted (use the OS LA engine), now you need to figure out how big and what materials you’ll use for the hull. A .15 engine is not all that powerful, so you’ll need to build the hull extremely LIGHT to get it to do much of anything. I tried a pair of Enya .15s on a small flat bottom boat made from thin plywood and pink insulation foam board. It didn’t do much of anything, and the hull only weighed a pound or so.

My advice - if you are a novice builder and you’re scretchbuilding this boat, sell the .15 engines and get a .40 instead. This will afford you more latitude in the weight department.

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